TRIBE BRACHIOPODA. 821 
T. Lenticunaris. Desh. Mag. Z.1841, t.41.—Sow. Th. 1, p. 360, 
t. 72, f. 108, 9, 0.—WatpHeEmia L. Gray, Brach. p.58. Orbicular, 
lentiform, smooth, dark red, subinequivalve, marginal line ascending 
from the umbo, then nearly straight, and very slightly sinuated at 
the ventral margin. Upper valve slightly acuminated and recurved 
dorsally ; perforation small, complete; cardinal area flattened, angular 
on the sides; deltidia rather large, flat, united. Lower valve circular, 
the internal appendage consisting of a single mesial rib (one-third the 
length of the shell) and two branches setting off from the umbones. 
2. New Zealand. 
T. Cranium. Mill. Z.D. Prod.—Mont. T. L. 11, p. 188, pl. 13, f. 2. 
—Sow. Th. 1, p.354, t. 70, f. 60, 1, 2.—Br. Mol. 2, p. 857, t. 57, f. 11. 
—Anomia C. Gm.—T. Virrea, Fl.—Watpueiia C. Gray, Brach. 
p. 58. Ovate, subtruncated at the ventral murgin, slightly acumi- 
nated dorsally, gibbous, pale, somewhat diaphanous; valves equally 
convex ; margin flexuous, slightly sinuated at the broader extremity, 
entire. Upper valve somewhat produced, slightly recurved and 
obliquely truncated at its dorsal end; perforation large, incomplete ; 
cardinal area indistinct, rounded, its deltidia small, lnear, separate. 
Lower valve slightly flattened, and somewhat angular at the broader 
extremity; internal appendage large, two-thirds the length of the 
valve, forming two lateral loops, one on each side, and then uniting 
to form one very large upper loop. 1. N. Hurope; Britain, rarely. 
T. SepriaerRA. Loven, Ind. Scand. 29.—WaLpHEmMIA 8S. Gray, 
Brach. p.59.—Davids. Ann. N. H.1855, t.10, f.1. Whitish, smooth, 
subpellucid, tumid, ovate-trigonal, strongly beaked, slightly biplicated ; 
ventral edge truncated, meeting the sides at obtuse angles; perfora- 
tion large, round; deltidium connate; smaller valve with a produced 
raised median septum; loop reflected, three-fourths as long as the 
interior of the shell. 13%. N. Europe. 
T. Groposa. Lam. 4.—Bl1. t. 52, f. 2.—Sow. Th. 1, p. 359, t. 71, 
f. 99 to 101.—WatpHemia G. Gray, Brach. p.59. Ovate, ventri- 
cose, subequivalve, whitish, very smooth, slightly trilobed ventrally ; 
margin entire, straight, sinuated at the ventral portion. Upper 
valve slightly acuminated dorsally, its vertex subretlected and trun- 
cated ; perforation large, oblique, nearly complete ; cardinal area large, 
rounded on the sides; deltidia large, triangular, separate; mesial 
ridge broad, rounded, not very distinct. Lower valve rounded, slightly 
lobed ventrally; internal appendage large, two-thirds the length of 
the valve, and formed as in CatiFornica. 13...1}. 
T. Prcra.—Anomta P. Ch. 11, f. 2011, 2.—A. Cranium, var. 
D. p. 295.—A. Rupra, W.S. t. 2, An. f.4.—T. P. Sow. Th.1, p. 351, 
t. 70, f.43, 4.—WarpHemia P. Gray, Brach. p.59. Ovate, slightly 
acuminated dorsally, thin, red with somewhat radiating white spots ; 
a4 
