TRIBE BRACHIOPODA. ay! 
drawing does not suit this shell; it exhibits a very decided rostellum, 
and absolutely simple and reniform lower scars, that greatly exceed the 
upper ones tn size. 
C. Anomana.*«— PateELLA A. Mill. Z. D. t. 6.— P. Distorta, 
Mont. Tr. Lin. 11, p. 195, t. 18, f. 5—Anomta Tursinata, Dil. in 
part. — Criopus A. Flem. — Cra. Rosrrata, Brit. Mar. C.— 
OrpicuLa Norveeica, Lam. from synonymy.—Brown.—Cra. N. Sow. 
Th.1, p.368, t.73, 7.15, 6, 7—Cra. R. Brit. Mol. 2, p.366, t.56,f.7,8. 
Rounded-subquadrate, retuse above: upper valve depressed-conical, 
smooth, not thick, either rufous-brown, reddish chocolate, or paler or 
darker liver colour, else rayed with these hues on a paler ground ; 
its upper scars large, its lower ones still larger, nearly confluent, each 
divided by a few somewhat radiating, obscure, groove-like mdenta- 
tions: upper scars of the lower valve separate, ovate, almost linked 
together in the middle; lower scars large, ovate, and somewhat 
angular above; rostellum obtuse; disk palmato-radiated; margin 
thickened, and somewhat scabrous. 4...%. Scotland; N. Europe. 
The apex is frequently submarginal. 
C. Rosrrata.—Anomta Crantonarts, Ch. (not Lin) f. 687, f. ¢, d. 
—C. R., Hening. Mon. Cran. p. 3, f. 38.—Desh. ed. Lam. 7, p. 302.— 
Sow. Th. 1, p. 368, t. 73, f. 12, 18, 14. Lower valve rounded-sub- 
trapeziform, nearly straight above; upper scar orbicular; lower ones 
small, somewhat lunulate, united below; rostellum small, rather 
sharp; disk with palmated and digitated impressions ; border granu- 
lose, irregular and thickened below: upper valve thinner, white, 
somewhat radiatingly rugose, internally with two elevated ridges 
diverging from the centre towards the upper corners. 4. Mediter- 
ranean. 
DISCINA=ORBICULA. 
Suborbicular, inequivalve, compressed, devoid of ligament or hinge : 
upper valve depressed-conical, of a more or less horny substance, tts 
vertex nearly central; lower valve more or less flat, membranaceous, 
perforated. 
Paes hamEcLOskS, | Brod. ae Ps £6a0) pol e4 + 7. L.. 4.98. 
f. 8, 4, 5.—Desh. ed. Lam. 7, p. 318.—Sow. Th. 1, p. 365, t. 73, f. 1. 
Of a horny substance, nearly orbicular, rather depressed, chestnut- 
brown, covered with elevated concentric lamelle; disk of adhesion 
oblong, close to the dorsal or upper edge, perforation oblong, placed 
near the dorsal part of the disk. %. Peru, in groups. 
D. (O.) Lavis. Sow. Tr. Lin. 13.—Sow. G.—Desh. ed. Lam. 7 
> 
p. 817.— Reeve, t. 129, f. 1, 2.—Sow. Th. 1, p. 365, t. 78, f. 2, 3. 
