944 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [NoV. 29, 



on the posterior side of tlie right valve, which becomes laminar to- 

 wards the upper part of the rostrum ; it commences below the beak, 

 and is connected on the side with the outer ridge or wall of the 

 cartilage-pit : inside glossy ; edges notched by the ribs : muscular 

 scars triangular, large, and well marked on the posterior side, and 

 strengthened by a short upright plate. L. 0"4, B. 0'5o. 



' Porcupine '■ Exp. 1870: Atl St. 16, 17, 24-28a. 



Distribution. Off Bermuda (' Challenger ' Exp.), Azores ('Jose- 

 phine' Exp.); 200-600 fms. 



May be distinguished at all ages from N. costellata by its more 

 globular shape and much shorter rostrum, and by the greater con- 

 tinuity of the ribs on the posterior side. See also my remarks in 

 the 'Annals and Magazine of Natural History' for December 1876 

 in comparison of the present species with N. striata. 



V 20. Ne.era costellata, Deshayes. 



Corbula costellata, Desh. Expl. Scient. Mor. (Geol.), p. 86, 

 t. vii. f. 1-3. 



N. costellata, B. C. iii. p. 49 ; v. p. 191, pi. xlix. f. 3. 



'Porcupine' Exp. 1869: St. 1, 6, 10,13, 14,25,35,61. 1870: 

 Atl. 1, 2, 3,3a, 9, 10, 13, Setubal B., C. Sagres, 26-29; Med. 

 Cartagena B., 55, Basel Amoush, Adventure Bank. 



Distribution. Bergen to G. Egina, Adriatic, Madeira, Canaries, 

 Jamaica?, G. Mexico? ('Blake' Exp.), New England; 10-250 fms. 



Fossil. Miocene : W. Indies ? Pliocene : Belgium, N. France, 

 Italy, Morea. 



Anatina radiata and A. ruggeri of Maravigna, according to 

 Aradas and Benoit, besides other synonyms given in ' British Con- 

 choloey.' 



\J 



■'OJ 



21. Ne.era striata, Jeffreys. (Plate LXXI. fig. 11.) 



N. striata, Jeffr. in Ann. & Mag. N. H. Dec. 1876, p. 495. 



'Lightning' Exp. : St. 4, 6 (living). 



'Porcupine' Exp. 1869 : St. 23 (living), 23a (fragment). 



Distribution. N. Atlantic (' Valorous ' Exp.), between Norway 

 and Novaya Sembha (' Voringen ' Exp.), between the Butt of 

 Lewis and the Faroe Isles (' Knight Errant' cruise), Bav of Biscay 

 (' Travailleur ' Exp.), New England ? ; 85-1450 fms. 



Probably N. multicostata of Verrill and Smith ; but I have not 

 yet been i'avoured with the promised opportunity of comparing 

 specimens. 



. 1. Corbula GiBBA, Olivi. 



Teliina yibba, Olivi, Zool. Adr. p. 101. 



C.ffihba, B. C. iii. p. 56, pi. ii. f. 5 ; v. p. 192, pi. xlix. f. 6, 

 'Porcupine' Exp. 1869: St. 1, 2 (and var. rosea), 6, 9, \Q, IS 

 (fry), Donegal B. (var.), 19 (fry), 21 (fry), 23ff, 25. The Minch, 

 Loch Torridon, off Lerwick. 1870 : Atl. 10, Vigo B., 13, Setubal 

 B., C. Sagres, 26, Tangier B. ; Med. Cartagena B., 50, 55 (fry), 

 G. Bona, Benzert Road, Basel Amoush, Tunis B., Adventure Bank. 



