322 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. l...f. 



T. Dilatata. Lam. 2.— Sow. Th. 1, p. 352, t. 70, /. 48, 9.— 

 T. Gaudichakdi, Bl. Diet. Sc. Nat. — Waldheimia D. Gray. Brack. 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 large, separate ; 

 mesial ridge very slight. Lower valve nearly orbicular ; internal ap- 

 pendage large, three-fourths the length of the shell, reflected as in 

 Californica. 1£. 



T. Californica. Kaster, vii. 1, £.2, b, /. 21, 2, 3. — Sow. Th. 1, 

 p. 352, t. 70, /. 50, 1, 2. — Waldeimia 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 obtusely angular; deltidia oblong, triangular, and 

 united ; no mesial ridge. Lower valve orbicular, without a mesial 

 furrow : internal appendage large, two-thirds the length of the shell ; 

 loop reflected. 2...1-|. California; the largest of the Terebratul^e. 1 



T. Rosea.— Anomia R. Mawe (1823), t. 15,/. 4.— IF. S. An. t. 2, 

 /. 2.— T. R. Sow. G.—Desh. ed. Lam. 7, p. 350,—Beeve, C. S. 1. 126, 

 /. 4.— Sow. Th. 1, p. 357, t. 71,/. 74, 5, 6, 7.— Bouchardia R. David. 

 B. Geol. Fr. — B. Tulipa, Gray, Brach. p. 101. Oblong-oval, rather 

 depressed, slightly attenuated dorsally, thick, subequivalve, smooth, 

 rose-coloured, with paler radiating marks ; margin entire, somewhat 

 flexuous, reflected 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 



1 This, with the six preceding species, and T. Flavescens and 

 Grayi, belong to the genus Waldheimia. " Smooth or plaited ; 

 foramen complete; loop elongated, and reflected; septum of the 

 smaller valve elongated." 



