Pecten frigidus, 
nomen Pectini profundorum maris polaris incolæ novum datum. 
Ad. S. Jensen. 
1876. Pecten fragilis Jeffreys, Ann. Mag. Nat. Hist. (4) XVIM, p. 424 
(partim). 
1879. P. fragilis jeneen I Frøs. Zool. Soc. Lond., p.561 (partim), PI. 45, 
ig. 1 ad dextra 
1879. P. fragilis Friele, Så d. auf d. norw. Nordmeerexped. bei Spitz- 
bergen gef. Mollusken; Jahrb. Deutsch. Mal. Gesellsch. VI, 64. 
1901. P. fragilis Friele & omgå The Norwegian North Atlantic Exped. 
Zool., Mollusca III, ey 
1902. P. biscayensis nede mm Locard), Moll. d. ersten Nordmeerfahrt d. 
Fischereid. , Michael Sars" 1900; "Bergens Museums Aarbog 1902, 
Nr. 2. 8, 15. £..17, 
Testa complanata, iuklerer suborbicularis, 
Paulo altior quam longior, margine ventrali simul cum, 
antico semicirculum formanjte, postico leviter arcuato 
aut fere recto, paulo inæquivalvis, valvula sinistra 
magis convexa, awuriculis parvis, inæqualibus, posterio- 
ribus minoribus, a testa leviter modo definitis, anterio- 
rum sinistra triangularis, dextra liris paucis squamu- 
latis ornata, margine dorsali denticulato, sinu byssali 
breviore acuto. Valvulæ tenuissimæ et fragiles, per- 
lucentes, argenteæ, cuncentrice plicatæ, plicis circiter 
1) Figura sinistra, quoad conturam, eandem testam ab interiore visam 
demonstrat, sed forma et sculptura esterioris 6 
20 
