OF SOUTHEEN INDIA. 41 



20. — C, angiistata (see ^^V^(?^ in Denksch.. Akad., Wien^ 1865^ xiv, pt. ii, p. 112). D'Orbigny 

 calls this species, which is a true Corhda, C. suh-angustata, and reserves the former name for the 

 tertiary M^a ? angustata, Sow. This last is, however, certainly not a Corhiila, though I would not 

 venture to assert positively to what genus that shell belongs without examining the orio^inal speci- 

 men itself; it may be a Himella or CorUilomya, but the cartilage process appears to be similar to 

 that of Cryptomya, to which genus it also probably belongs. 



21. — C. substriatula is a true Corhila, 



22. — C. lineata of Miiller is more likely a Corhulomya, than a Corhila; it is rather compressed 

 and nearly equi valve. 



23. — C. ohtusa of the same author is also a sub-equivalve species, and more probably 

 belongs to one of the sub-genera of NecBra, than to Corhula, Bosquet considers it to be a Poromyaj 

 (Foss. flora and fauna v. Limb., &c., in Staring^s Bodem. v. Nederland). 



24. — C. ovalis Pictet suggests to be a Thracia, but unless the original specimen be examined 

 nothing positive can be said of it. Morris does not even accept the species in his list of British 

 fossils. 



25.— C. velata, Schafhseutl, (Bayern's Leth. Geog., p. 176), may be a valve of a Corhila, but 

 it would be labour in vain to theorize on that author^s ideas of geological formations. 



26-27. — G, caudata, Nillson, and C, cometa, Coq., belong to all appearance to Necera, but the 

 form which Goldfuss, (Petr. Germ., p. 251, pi. 151, fig. 17), describes and figures as a species 

 identical with G. caudata of Nillson is certainly quite a different one. 



28-29. — Conrad describes from Palestine, in the official report of Lynches Expedition, C. suhlmeo- 

 lata and syriaca, Fraas (Wiirtemb. Jahresh. xxiii, 1867, p. 236), considers the former as identical 

 with C. striatula. Sow. The same author also states that Conrad's C. congesta, which is said to have 

 been without any reason referred to the Jurassic period, is based upon a cast not admitting of specific 

 determination. I have, I am sorry to say, not as yet been able to get access to Conrad^s ''^official 

 report.''^ 



30-40. — Meek in his Check-list of Inverteb. cretaceous fossils of North America (Smiths. Misc. 

 Coll., No. 177, 1864,) quotes Corh. crassimarginaia, crassiplicata, Mtfalensis, Foulkei, Qraysonensis, 

 Killgardii, inor7iata, occidentalism subcompressa, Tioomeyi, and Gorhdamella gregarea. I have not 

 been able to ascertain whether Gabb''s C suh-caudata is to be retained as an independent species. 



41-46. In the Palseont. of California (vol. i and vol. ii, p. 233, &c.,) Gabb describes — 

 ? C. primorsa, C, TrasJciij cultriformis, parilis, Hornii, and alceformis. The last but one species may 

 prove to be a Corhdomya, and the first is also posteriorly peculiarly pointed, but it may be only a 

 youDg valve of a Corhula. 



47-48. — G. Chilensis, from Chili, and C Columbiana, from Columbia. 



49-53. — From India I shall have to add the following five species ; C striatuloides , parsura, 

 cancellifera, minima, and exidans ; the three first belong to the Trichinopoly, the fourth to the Arria- 

 loor, and the fifth to the Ootatoor group. 



NEMRA, 



54-57. — Pictet and Campiche quote in the ^^ Paleontologie Suisse^"* N, Sabaudiana, Sanctce- 

 erucis, caudata, and (^idllanensis , to which N. cometa, {Corbida apud Coquand, Monog. fitage 

 Aptien, 1865, p. 102,) has most likely to be added. 



57<^. — Necera brevirostris, Alth, sp. (Nucula id., Alth) is described from the upper cretaceous 

 deposits near Lemberg (Desc. des Moll. foss. de la craie des ... Lemberg, &c., par E. Favre, Geneve 

 1869, p. 103). 



58. — Bosquet (in Staring ^s Bodem v. Nederland) names a Necera longicauda, but I have not 

 yet met with the description of the species. 



Eichwald (Leth. ross., 1867, xi livr., p. 743,) describes from ^^gres verts^'' near Orenbourg 

 a Necera tenuis, but the shell has evidently nothing to do with that genus ; it is either a Leptomya, 



L 



