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



Little Minch. 18/0: Atl. 3, Vigo B., 13, 16, 17a, Setubal B., 

 24, C. Sagres, 26, 29, 30 ; Med. 45. _ 



Distribution. Iceland and Loffoden I. to Sicily and the Adriatic ; 

 3-400 fms. 



Fossil. Upper Tertiarles : S. Italy. Post-tertiary : Norway ; 

 0-10 ft. 



Besides the synonyms given in * British Conchology,' this species 

 is Erycina fabida of Brusina. 



Body whitish, with minute flake-white specks : mantle having its 

 edges closely fringed with short but rather stout tentacular processes 

 or cirri, which are studded with tubercular points and are sometimes 

 branched : tubes separate throughout, remarkably long and cylin- 

 drical ; incurrent or lower tube microscopically veined lengthwise 

 and marked on the inner side with two white lines ; its orifice is 

 furnished with slight tooth-like points ; orifice of excurrent tube 

 contracted when at rest : foot tongue-shaped, thick and expansile. 



. 4. SCROBICULARIA LONGICALLUS, Scacclli. 



Tellina longicallus, Sc. Notizie, p. 16, t. 1. f. /. 



'Porcupine' Exp. 1869: St. 5, 37, 38, 45-455, Little Minch. 

 1870 : Atl. 1, 3, 6, 8, 9, Vigo B., C. Sagres, 26-34, 36, Tangier B. ; 

 Med. 45, Capo de Gata, 51, 55, xldventure Bank, off Rinaldo's 

 Chair. 



Distribution. LofToden L to the jEgean and Adriatic, ofiF the Cana- 

 ries ('Challenger' Exp.), E. Mexico (Blake's Exp.) ; 50-1125 fms. 



Fossil. Upper Tertiarles : Biot, Italy. Post-tertiary : Norway. 



Syndosmya telUnella, Seguenza ; in the younger state Ligula pro- 

 fundissima, Forbes. Philippi misquoted Scacchi's specific name, 

 and called it " longicallis" instead oi longiccdlus, which is more in- 

 telligible if not more classical than tlie other. 



This shell is larger and more compressed and thinner than S. alba, 

 is not so oval, and is somewhat flexuous at the posterior side ; the 

 cartilage and its pit are elongated and much narrower. In (S. alba 

 the pit is spoon-shaped. The lateral teeth are far longer in the 

 present species. Excellent figures of -S. longieallus are given in 

 Professor G. O. Sars's work on the arctic MoUusca of Norway. It 

 is also a British species, and was regarded by me as a large form or 

 variety of S. alba. The range of depth at which S. longicallus has 

 been found living is very remarkable, extending according to the 

 ' Porcupine ' Expedition from 20 to 2435 fms. 



5. SCROBICULARlA ALBA, W. Wood. 



Mactra alba, W. Wood, in Linn. Trans, vi. p. 165, t. xvi. f. 9^12. 



S. alba, B. C. ii. p. 438, pi. viii. f. 4 ; v. p. 189, pi. xlv. f. 3. 



' Porcupine' Exp. 1869 : St. 3, North Channel, 40(var. radiata), 

 near Belfast. 1870 : Atl. Vigo B., C. Sagres ; Med. Cartagena B,, 

 50, G. Bona. 



Distribution. Finmark to Sea of Marmora, Adriatic, Mogador ; 

 2-400 fms. Bay of Biscay (' Travailleur ' Exp.) ; 604-645 fms. 



