On some new and peculiar Mollusca. 231 



Var.= T. castmiea, Kiener, I. c. pi. 7. f. 14. 



Var.= T. laurina, Hinds, Thesaurus Concli. i. pi. 42. f. 27, 



Var.= r. stylata, Hinds, I. c. pi. 44. f. 79. 



Var.= T.jamaieensis, 0. B. Adauas, Contrib. Concliol. i. p. 68. 



Hab. West Indies. 



XIX. — New and peculiar Mollusca of the Patellidge and other 

 Families of Gastropoda procured in the ' Valorous ' Expe- 

 dition. By J. GwYN Jeffeeys, LL.D., F.R.S. 



PatellidsB. 



Tectura rubella, Fabricius. 

 Patella nibella, Fabr. Fn. Gr. p. 38G. 



Body grejish-white, with numerous and close-set brownish 

 streaks in front : head semicircular : mouth concave, opening 

 horizontally, and puckered : mantle thick : tentacles awl- 

 shaped, contractile, with blunt tips : eyes small, black, sessile 

 on the tentacles at their outer base : foot oval. Sluggish. 



Godhavn, 5-20 fms. ; Station 4, 20 fms. ; 5, 57 fms. 

 (dead) ; Holsteinborg, 3-12 fms. Greenland (Fabricius and 

 others). Spitzbergen (Torell) ! Tromso, Norway (M. Sars). 

 Labrador (Packard, fde Whiteaves) ; Newfoundland (Ver- 

 kriizen) ! 



Young shells have a butotn-shaped (and not a spiral) apex, 

 which turns to the broader and longer end, as in Lepeta ; but 

 in the latter genus the apex is spiral. The apex is strongly 

 striated lengthwise, and resembles that of Ancylus. 



In a Greenland specimen, which I received from Dr. 

 Morch, I found two fry with perfect shells enclosed in the 

 concavity of the foot. Perhaps T. rubella may be the type of 

 a distinct genus (say Erginus, from one of the Argonauts). I 

 see no reason for changing the opinion which I expressed in 

 the third volume of 'British Conchology,' p. 246, for retaining 

 the generic name Tectura in preference to the later and objec- 

 tionable name Acmcea, although Mr. Dall and the Eev. J. E. 

 Tenison Woods prefer to use Acmcea. 



Lepeta cceca, O. F. Miiller. 



Patella c<sca, 0. F. Miiller, Zool. Dan. Prodr. p. 237. no. 2866. 



Body of a pale yellowish colour, pinkish about the head : 

 mouth round, opening vertically : mantle thick : tentacles awl- 

 shaped, and thick : eyes none : foot oval, stout. 



