PLATE XVIII. 



Fig. ... 1. ScAPHARCA PoNTiCEEiANA, ^'Ori., p, 35-5; nortli-east of Serdamnngalum, Anialoor 



groujj. 



Figs. 2—5. Trigonoarca Galdrina, rJ'O/'ii., p. 355 ; hqvlx Stnpermatiir, Arrialoor grojtp. 



Figs. 6 — 11. Macrodon [Grammatodon] Japeticum, Forbes, p. 350; specimens of different 

 sizes showing the distinct oruamentation of the two valves ; Anialoor, Arrialoor 



group. 



Figs. 12 & 14. Teigonoarca Trichinopolitensis, Forbes, p. 353; east of Anapaudy, Trickinopoly 



gro^qj. 



Fig. ... 13. Trigonoarca Brahminica, i^o^'ie*, p. 354 ; south-east of iluUoor, Arrialoor group. 



