.

sur

van

5. CHIARUGI, A.

Legni fossili della Somalia Italiana,

Palaeontographica Italica, 32, Suppl.

I, 106-118. 1933. 6. CHOWDHURY, K. AHMAD

A fossil dicotyledonous wood from

Assam. Ann. Bot. 50, 501-510.

1936. 7. CRIE, L. .

Recherches la Flore Pliocene de

Java. Samm. Geol. Reichs. Mus.

Leiden, 5, 1-22. 1888. 8. DEN BERGER, L. G. Fossiele Houtsoorten uit het Tertiair

Zuid-Sumatra. Verhand. Geol. Mijnb. Gen. Nederland en Kol. 7,

143-148. 1923, 9.

Unterscheidungsmerkmale von rezen

ten und fossilen dipterocarpaceengattungen.

Bull. Jard. Bot. Buitenzorg.

(3), 8, 495-498. 1927. 10. DESCH, H. E.

Commercial Timbers of the Malay

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17 : Dicot. 1931. . 12. Evans, P.; METRE,

W. B. & Singh, B.
H.

Additional fossil localities in the upper

Tertiary of the Garo Hills, Assam.
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Cong. 381.

1932. 13. FOXWORTHY, F. W. , Dipterocarpaceae

Dipterocarpaceae of Malay Peninsula,

Malayan For. Rec. No. 10. 1932. 14. GAMBLE, J. S.. A Manual of Indian Timbers. 1922. 15. GOEPPERT, H. R. Die Tertiarflora auf der Insel Java.

1854. 16. GUPTA, K. M.

Critical Remarks on Dipterocar poxylon

burmense, Holden: Irrawadiocylon, Gen. Nov., Proc. Ind. Aca. Sci. I, 9, 549-555. 1935.

.

17. GUPTA, K. M.

A review of the Genus Dipterocarpoxy-
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Surv, India, 47, 267-272. 1916.

18. HOLDEN, R.

19. KANJILAL, U. N. & P.

C. & Das, A. 20. KRAUSEL, R.

aus

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1922.
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Ueber einige Fossile Holzer aus Java.

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23.

24. LECOMTE, H. .

25. MOLL, J. W. & JANS

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Mikrographie des Holzes der auf Java

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27. PFEIFFER, J. P. & VAN HEURN, J. F. C. . Some Fossil Woods from Java not yet

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Hills. Rec. Geol. Surv. Ind., LI,

126-129. 1919. 29. RECORD, S. J. & MELL, C. D. .

Timbers of Tropical America. 1924. 30. RECORD, S. J. . Timbers of North America. 1934.

22,

33. Rode, K. P. .

34. SCHUSTER, J. .

Diagnostic value of measurements in
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Woods of Philippine Dipterocarps.

Philippine Jour. Sci. 291-344.

1923.
A Silicified Dicotyledonous Wood :

Dryocylon mohguænse sp. nov. from
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131-138. 1936. .
Ueber Nicolien und Nicolien ahnliche

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35. SEN. J.

36. SEWARD, A. C. . 37. SOLEREDER, H, .

38. VREDENBURG, E.

on

ܕ

Dipterocarpoxylon garoense, sp. nov., G. S. I. Type No. 16502.
Fig. 1. Transverse section showing distribution of vessel, rays and vertical gum

ducts. Note the arrangement of gum ducts at the right hand corner

(Gd). x 10. Fig. 2. Transverse section showing distribution of small (Sv) and large vessels in

comparison with that of gum ducts (Gd.) x 40.

Fig. 3. Transverse section showing parenchyma and tracheids round the vessels. Note also the distribution of metatracheal parenchyma cells.

X 75. FIG. 4. Transverse section showing a pair of gum ducts surrounded by rows of

parenchyma cells. 35. Fig. 5. Tangential section showing distribution, width and height of rays. Note also the size and shape of the cells forming different types of rays.

>50. Fio. 6. Tangential section showing tyloses in the vessels.

X110.

PLATE 16.

Dipterocarpoxylon garoense, sp. nov., G. S. I. Type No. 16502. Fig. 1. A vessel element showing inter-vessel pits. X 90. Fig. 2. Radial section showing inter-vessel pits (Ivp) and fungal hyphæ (H.)

X 440. Fig. 3. Radial section showing vessel-ray pits (Vrp). Note their distribution and

size. X 440.

Dryoxylon sp., G. S. I. No. K40/485. Fig. 4. Transverse section showing general structure of the wood. x 10. Fig. 5. Tangential section showing size and distribution of rays. Note the shape of individual cells of rays.

X 75. Fig. 6. Transverse section showing distribution and arrangement of wood fibres.

X 35.

ON SOME Fossil FISH-SCALES FROM THE INTER-TRAPPEAN BEDS

AT DEOTHAN AND Kheri, CENTRAL PROVINCES, BY SUNDER Lal HORA, D.Sc., F.R.S.E., F.N.I., Assistant Superintendent, Zoological Survey of India, Calcutta. (With Plates 17 and 18.)*

CONTENTS.

PAGE.

267 269 269 271 274 277 278 281 282

.

INTRODUCTION
SYSTEMATIC DESCRIPTION.

Clupeidae
Osteoglossidae.
Cyprinidae
Polyacanthidae
Serranidae
Nandidae

Pristolepidae
GEOLOGICAL AGE OF THE INTER-TRAPPEAN BEDS AND SOME OBSERVA-

TIONS ON THE ECOLOGICAL CONDITIONS OF THAT PERIOD
LIST OF REFERENCES
EXPLANATION OF PLATES

.

284 292 294

.

INTRODUCTION.

The fossil fish-scales described below were collected by Mr. H. Crookshank, Superintending Geologist, Geological Survey of India, from the Inter-trappean beds about mile to the east of Deothan (22° 19' : 77° 35') and about 1 mile to the east of Kheri (22° 22': 77° 29') in the Central Provinces. In his memoir on the 'Geology of the Northern Slopes of the Satpuras between the Morand and the Sher Rivers' (1936, p. 288), he made a reference to my tentative conclusions regarding the identity of some of the fish scales, but later he collected much more varied material. A brief reference was also made to these scales by Crookshank, Sahni, and the writer at the General Discussion on the Age of the Deccan Trap' held at the 24th meeting of the Indian Science Congress at Hyderabad in 1937. In the following account the various types of scales are described and their probable relationships elucidated. Oppor. tunity has also been taken to describe some other infra- and inter