21. Spondylus radians ? Lam. Hist. 6 pt. 1 192.
Icon. Chemn. Conch. 7 t. 45. f. 469. 470. Ency. Meth. plate 191. f. 5.
22. Pecten maximus ? Lam. Hist. 6 pt. 1 163.
Ostrea maxima, Gmel. Syst. Nat. 1 3315.
Icon. Chemn. Conch. 7 t. 60. f. 585. Ency. Meth. plate 209. f. 1. a, b.
The shell before me is probably distinct from the above species, but is too much worn down to be separated from it; in its present state it seems to agree tolerably well with the species to which it has been referred.
23. Pecten asperrimus, Lam. Hist. 6 pt. 1 174.
This beautiful species was originally found by MM. Peron and Lesueur on the coast of Van Diemen's Land.
24. Lima minuta (n.s.)
Testa ovato-oblonga valde tumida clausa radiatim costata, costis transverse costato-striatis, auriculis minutis, margine crenato.
This shell, which was brought up by the deep sea sounding-lead, being only one-sixth of an inch long, and one-fourth high, is the smallest species of the genus. It is white, ovate, oblong, turned and closed at the ends; the surface is deeply radiately ribbed; the ribs are concentrically rib-striated, which gives their sides a denticulated appearance; the edge is crenulated, and the umbones are acute, a small distance apart, and nearly in the centre of the hinge margin, which is straight.
25. Pinna dolabrata, Lam. Hist. 6 pt. 1 133.
Pinna bicolor, Chemn. Conch. Cab. t. 90. f. 234.
Icon. Chemn. 8 t. 90. f. 780 ?
The shell, figured by Chemnitz, appears to be a variety of this species with the anterior end uncurved, which has most probably been caused by some injury on the anterior basal edge.