1881.] 'lightning' and 'porcupine' expeditions. 723 



3. PsAMMOBiA tellinella, Lamarck. 



P. tellinella. Lam. An. s. vert. v. p. 515 : B. C. ii. p. 392, pi. vii. 

 f. 4; V. p. 187, pi. xlii. f. 1. 



'Porcupine' Exp. 1870 : Atl. St. Vigo B. 



Distribution. Loffoden Is. and Faroe Is. to Sicily; 0-85 fms. 



Fossil. Upper Tertiaries : Coralline 

 tertiary : Uddevalla. 



(- 4. Psammobia vesi>ertina, Chemnitz. 



Lux vespertina, Chemn. Conch.-Cab. 

 a, b. 



Psammobia vespertina, B. C. ii. p. 398 ; 



'Porcupine' Exp. 1869 : St. 7 (fragment). 



Distribution. Bergen to the^Egeau, Adriatic, Mogador, Senegal?, 

 Canaries ; 0-40 fms. 



Fossil. Upper Tertiaries : Coralline Crag, Italy. Post-tertiary : 

 Belfast and Killiney, Calabria. 



I am now inclined to think that Dillwyn may have been right in 

 considering this species the Tellina albida of Linne. The hinge is 

 certainly " absque dentibus marginalibus ;" and the description 

 agrees also as to colour, which is very variable. P. intermedia of 

 Deshayes (Proc. Zool. Soc. 1854, p. 319), =P. costata, Hanley, apud 

 jMcAudrew, is certainly a monstrous variety of P. vespertina, having 

 stronger and more oblique concentric ridges. The types, from 

 Algiers and Faro in Portugal, are now before me. 



i^ 1. DoNAX vittatus. Da Costa. 



Cuneus vittatus, Da Costa, Brit. Conch, p. 202, pi. xiv. f. 3. 



Donax vittatus, B. C. ii. p. 402, pi. vii. f. 5 ; v. p. 188, pi. xlii. 

 f. 5. 



'Porcupine' Exp. 1870 : Atl. St. C. Sagres (ralve). 

 Distribution. Norway to Egypt, Adriatic, Mogador ; 0-25 fms. 

 Fossil. Upper Tertiaries and Post-tertiary: British Isles, S.W. 

 France, Italy; 0-1360 ft. 



For synonymy see B. C. ii. pp. 405, 406. 



'/ 2. Donax venustus, Poll. 



D. venusta, Poli, Test. utr. Sic. ii. p. 80, t. 19. f. 23, 24. 



'Porcupine' Exp. 1870 : Med. St. Algesiras B., 40, 41, 50 51. 



Distribution. Mediterranean from Gibraltar to the iEgeau and 

 Black Sea, Adriatic, Madeira ; 0-8 fms. 



Fossil. Upper Tertiaries : S. France, Italy. Post-tertiary : 

 Calabria. 



Differs from D. vittatus in being shorter or narrower, and in 

 haying the posterior side obliquely furrowed or striated. 



t 3. Donax trunculus, Linne. 



D. trunculus, L. S. N. p. 1127 (partly): B. C. ii. p. 407; v. 

 p. 188, pi. xlii. f. 6. 



'Porcupine' Exp. 1870 : Med. St. 51, Benzert Road (young). 



