40 MOLLUSCA FROM THE CRAG. 
12. Pecten Isuanpicus, Miller, Tab. V, fig. 1. 
Prcren Isuanpicus. Mill. Zool. Dan. Prod., p. 248, No. 2990, 1776. 
— — Chem. Conch. Cab., vii, p. 314, pl. 65, figs. 615-16, 1782. 
— Brown. Mlust. Conch. Gr. Brit., pl. 33, fig. 3, 1827. 
— — Flem. Brit. An., p. 385, 1828. 
— i Desh. 2d ed. Lam., vii, p. 145, 1836. 
— — Gould. Invert. Massach., p. 133, fig. 87, 1841. 
— — Miller. Ind. Moll. Green., p. 16, 1842. 
— — G. Sow. Thesaur. Conch., vol. i, p. 75, pl. 17, figs. 159-160, 1843. 
— — Dekay. Nat. Hist. New York Zool., p. 173, pl. 11, fig. 206, 1843. 
— — Lovén. Ind. Moll. Seand., p. 30, 1846. 
—~ — Chenu. Conch. lust. Pecten., pl. 32, figs. 1—4. 
— —_ Forb. and Hanl. Hist. Brit. Moll., vol. ii, p. 303, 1849. 
— — Middendorff. Mem. de \’Acad. des Sci. St. Petersb., p. 526, t. 12, 
figs. 7-8, 1849. 
= G. B. Sow., Jr. Thesaur. Conch., vol. i, p. 75, pl. 17, figs. 159—161, 
1847. 
OstrEaA Istanpica. Gmel. Syst. Nat., p. 3326, 1788. 
= = Turt. ed. Linn., vol. iv, p. 267. 
== = Shaw. Zool. Misc., vol. xxiii, t. 978, 987. 
= == W. Wood. Ind. Test., p. 49, pl. 10, fig. 21, 1825. 
—  CINNABARINA. Born. Mus. Cees. Vind., p. 103, 1780. 
= — Dillwyn. Desc. Cat. Rec. Shells, p. 256, 1817. 
Preotrn Peau. Conrad. Amer. Mar. Conch., p. 12, pl. 2, fig. 2, (fide Gould). 
Ency. Method., pl. 212, fig. as 
Lister. Hist. Conch., pl. 1057, fig. 4. 
Spec. Char. Testd suborbiculari, equilaterali, convexiusculd, subequvalvi, radiata, 
radiis numerosissimis, bisulcatis, scabriusculis ; auriculis inequalibus. 
Shell suborbicular, equilateral, slightly convex, subequivalve, covered with nume- 
rous close-set, somewhat scabrous bisulcated rays or costulated striz; auricles 
unequal. 
Locality. Clyde Beds. 
Recent, Scandinavia, Greenland, and North American Seas. 
This handsome shell is rejected by British Conchologists, as a living inhabitant of 
our own Seas, it must necessarily, therefore, fall into the hands of the British 
Paleontographist, as a fossil species, it being abundant in the Clyde Beds. Dead 
valves have been dredged up in the Scottish and Zetland Seas, from depths varying 
from thirty to one hundred fathoms. 
It is, essentially, a Boreal species, and is found living upon the Banks of New- 
foundland, where it is said by Dr. Gould, to be the favorite food of fishes. I have 
not as yet seen a specimen from any of the three Formations into which the Crag has 
been separated, although fragments of what may belong to this species have been 
found in the Mammaliferous Crag, at Bramerton, and what were considered to 
