166 CEETACEOUS PELECYPODA 



186. — V, cretacea, d^Orb._, (ibid,,) is ^^ ovato-eompressa, antice brevi, postice mgulata'' — sie ! 



187. — V. Hallii, Gabb; 1862, (olim V. OrUgnyana^ Gabb, non id. Forbes)^ Proc. Am. PL 

 Soc, vol. viii; p. 235. 



188. — Cypnmena sjAssa, Conrad^ (Am. Journ. Conch.^ v, [1869], p. 44), from New Jersey, 

 (a very insufficient cast) . 



189. — Gemma f cretacea, Conrad, (ibid, v, p. 96,) is from Mississippi. 



Thetironia, (vide Catalogue des ^^ Thetis connues/' Pictet et Campiche in Pal. Suisse, 4™® ser., 

 S'^^ part., p. 209). 



190-198. — Thetis Benevieri, minor, Icevigata, Prestensis, major, Genevensis, Sanctce-crucis, 

 Botomagensis, and undulata, 



Gorhula gigantea, Sow., often referred to Thetironia, is most likely a Poromya, and Corbula 

 IfBvigata, Sow., "'suggested to belong to the same genus, will be noticed as the type of a new genus, 

 Fimbriella, in the family Lucinidje. 



\^%,—?Th, elongata, Gabb, (Pal. Calif., ii, p. 186, pi. 30, fig. 80,) seems rather to have the 

 form of a Crassatella than that of a Thetironia. 



The following is the list of our South Indian cretaceous species. 



200-210. — Baroda [Icanotia r\ Pondicherriensis, Forbes, sp., Baroda \Icanotia'\ elicita, 

 StoL, Gytherea plana, Sow., G. Ganidana, Stol., G. Arcotensis, Forb., sp., C. lassula, StoL, 

 Gyth. [Callista'] solitaria, Stol., G, [Gall.'] sculpturata, StoL, G. [Gall.'] fabulina, Stol., G. [Gall.] 

 laciniata, StoL, G. [Gall.] minntula, StoL, G. [Gall.] vagrans, StoL, G. [Garyatis] turgidula, 

 StoL, G. [Gar.] Telugensis, StoL, G. [Car.] intercisa, StoL, Gyprimeria analoga, Forbes, sp.. 

 Gyp. Oldhamiana, StoL, Gyp. obesa, d^Orb., sp., Briphyla leriticularis, Goldf., sp., Eriphyla Forbe- 

 siana, StoL, Er. diversa, StoL 



Of doubtful species there are large numbers. Pictet and Campiche point out several, 

 and many more could be added ; but as I have not examined authentic specimens, and as the 

 figures do not allow any better conclusions to be made than those upon record, I shall not notice 

 them further, I may only mention the following — 



Gytherea Herzogii, Hausmann, in Goldf. Petr. Germ., ii, p. 239, pi. 149, %. 10. Judging 

 from the general character of the shell and especially its strongly crenated internal margins, it is, 

 I think, pretty certain that this species is an Eriphyla. 



Venus perovalis, and also F. Syriaca and indurata of Conrad from Palsestine, are said by Fraas 

 to be in a state hardly sufficient for determination (vide Wiirt. Nat. Jahreshefte, xxiii, 1867, 

 p. 238). 



Astarte ? discus, Sharpe, (Quart. Journ. Geol. Soc, Lond., vi, p. 177,) from Spain could 

 be an Eriphyla with a flat strong shell, but the hinge is not known. 



Fen. exularis. Keys., a little tumid oval species. Eichwald (Leth. Ross., livr. xi, 1867, p. 712,) 

 supposes that this may rather be a neocomien than a Jurassic shell. 



Taking now a very general view of the characters of cretaceous species which 

 are up to the present known, and supposing that only some of my suggestions are 

 correct ( — at least those in which I have examined the hinges, or of which good 

 figures exist), we may be allowed to summarise the investigations regarding the 

 representation of the Venerib^ in cretaceous rocks in the following words — 



Of the TAPE8IN2E we find only a few doubtful species belonging to Pullastra, 

 Semitapes, Tapes^ and one species of Amygdala ; on the other hand, many belong 

 to the new genus Baroda and its sub-genus Icanotia; they are all in external 



