330 TESTACEOUS MOLLUSCA. 
perforation, and its rather more extended and somewhat differently 
Jormed internal appendage. 
T. Japonica. Sow. Th.1, p. 344, t. 68, f.7, 8—TEREBRATULINA J. 
Gray, Brach. p. 50, probably. Oblong, rounded ventrally, thin, 
whitish ; valves nearly equally convex, with numerous radiating rather 
irregularly dichotomous striz, which very minutely denticulate the 
edge, and are very closely arranged on the sides near the hinge, 
where the outline is rather flattened. Upper valve somewhat pro- 
duced and truncated dorsally; perforation moderately large, very 
oblique, incomplete; hinge-area indistinct, with obsolete deltidia ; 
internal appendages small, one-third the length of the valve, with 
two narrow little branches and then a broad flexuous loop. 14. 
Japan. The loop is termed “ anelliform” by Gray. 
T. Ancusta. Adams and Reeve, Samar. p. 71, t. 21, f. 2.—TERE- 
BRATULINA A. Gray, Brach. p.50. Elongated-oval, slightly com- 
pressed, transparent white, radiated with very fine and close rugulose 
costelle ; beak truncated; valves nearly equal, with a slight mesial 
indentation, a little smuated ventrally. 42. Japan. Very like 
T. Caput-SERPENTIS. 
T. Cancettata. Koch in Kust. vii. 1, t. 2, b, f. 11, 2, 3—Sow. 
Th. 1, p. 358, t. 71, f. 93, 4, 5—TereBratutina C. Gray, Brach. 
p. 50. Ovate-oblong, ventricose, brownish, with very slender close- 
set radiating striz, that are finely decussated by the lines of growth ; 
edge very finely crenulated, flexuous. Valves very unequal; upper 
one the more convex, oblong, acuminated and truncated dorsally ; 
lower one subovate, with the dorsal edges sloping. Perforation large, 
round, complete; hinge-area aeds with rather large obsoletely 
erooved deltidia, that are united in the middle; loop short. 3. 
T. ApysstcoLa. Adams and Reeve, Samar p. 72, t. 21, f. 5.— 
TEREBRATULINA A. Gray, Brach. p.51. Subovate-trigonal, tapering 
to the beak, subtruncated and retuse ventrally, pellucid flesh-colour, 
obscurely radiated with obsolete costelle and raised striz ; beak pro- 
duced ; perforation moderate, entire. Valves nearly equally convex ; 
lower one bluntly acue ae dorsally, with a slight mesial depression. 
3. Cape G. Hope. 
T. Cumrneit. fel MNT C. Davids. Z. P. 1852, t.14, f. 17, 
8, 9.—Gray, Brach. p.51. Very small, somewhat pentagonal, gibbous, 
yellowish white, rayed with very numerous minute intercalated raised 
striz ; with very small ears; beak small, obliquely truncated by a 
round incomplete perforation; deltidia separate; margins slightly 
sinuated ventrally ; loop anelliform. }. Chinese Seas. 
T. Evansut.— TEREBRATELLA EK. Davids. Z. P. 1852, t.14, f.7,8,9 
—Maeas E. Gray, Brach. p. 99, f. 11, 2. Subovate, pale red, with 
a few unequal bifurcated ribs; beak tapering, slightly recurved, with 
