822 TESTACEOUS MOLLUSCA. 
valves nearly equal, smooth, without mesial ridge or furrow; margin 
entire, straight, its ventral portion very obsoletely sinuated. Apex 
of the upper valve recurved, with a small entire perforation ; cardinal 
area small, rounded laterally, with small narrow united deltidia. 
Lower valve flattish, its internal appendage elongated, recurved. 
Java Vs..3. 
T. Dimatata. Lam. 2.—Sow. Th. 1, p. 352, t. 70, f. 48, 9.— 
T. GaupicuarDt, Bl. Dict. Sc. Nat.— Wartpueimia D. Gray, Brach.59. 
Nearly orbicular, thin, smooth, pale brownish ; valves unequal; margin 
flexuous, entire. Upper valve slightly acuminated dorsally, reflected, 
obtuse, with a large incomplete perforation ; cardinal area rather large, 
flattened, with obtusely angular sides ; deltidia rather lar ge, separ ate ; 
mesial ridge very slight. Lower valve nearly orbicular ; internal ap- 
pendage large, three-fourths the length of the shell, reflected as m 
Catirornica. 14. 
T. Catirornica. Auster, vii. 1, t. 2, b, f. 21, 2, 3.—Sow. Th. 1, 
p. 352, t. 70, f. 50, 1, 2.— WarpeEimia C. Gray, Brach. p. 60. 
Nearly orbicular, slightly acuminated dorsally, gibbous, light brown ; 
valves nearly equal, smooth; margin entire, sloping from the apex, 
then straightish and very obsoletely sinuated in the middle of the 
ventral margin. Upper valve slightly beaked, apex short, slightly 
acuminated, ‘reflected ; perforation small, entire; cardinal area rather 
broad, its edges obtuscly angular ; deluain oblong, triangular, and 
united; no mesial ridge. Lower valve orbicular, ae ihane a mesial 
furrow: internal appendage large, two-thirds the length of the shell ; 
loop reflected. 2...15. California ; the largest of the TEREBRATULA.? 
T. Rosza.—Anomia I. Mawe (1823), t, 15, f. 4.—W. S. An. t. 2, 
f.2.—T. Ti. Sow. G.— Desh. ed. Lam. 7, p. 850,—Reeve, C. 8. t. 126, 
f.4.—Sow. Th. 1, p.357,t.71, f.74, 5, 6, 7.—Boucuarpia R. David. 
B. Geol. h’r.—B. 'Tuntpa, Gray, Brach. p. 101. Oblong-oval, rather 
depressed, slightly attenuated dorsally, thick, subequivalve, smooth, 
rose-coloured, with paler radiating marks; margin entire, somewhat 
flexuous, retiected ventrally. Upper valve the larger, rather produced 
dorsally, truncated ; perforation very small, complete, apical; cardinal 
area rather wide, with united deltidia, which are marked by a mesial 
groove. Lower valve ovate, slightly attenuated and rounded at the 
ventral portion, broader at the dorsal portion, from whence the sides 


t This, with the six preceding species, and T. FLavescens and 
GrayI, belong to the genus WaLpHEIMIA. “Smooth or plaited ; 
foramen complete; loop elongated, and reflected; septum of the 
smaller valve elongated.” 
