Jrom the Gulf of California, elc. 397 
ing a sinuosity at the posterior inferior angle. Hinge of two deeply 
cleft divergent teeth in the right valve, (or four arranged in pairs,) 
and three in the left, of which the middle one is unequally bifid. 
No lateral teeth. Siphonal sinus acute, extending to the centre of 
the valve. 
Length one and three fifths inches ; height one and a half inches ; 
breadth seven eighths of an inch. 
Inhabits Mazatlan. Lieut. Green. 
This shell has very nearly the outline of Cyth. prostrata, espe- 
cially its pouched ventral margin, but is much more ventricose an 
very different in sculpture. It is also very much like A. tenuis, 
Sowb., but is larger, and has a distinct lunule. A. Chinensis is also 
allied in form. 
TELLINA MINIATA (Plate XVI. Fig. 1.) 
Telina miniata, Gould; Proc. B. S. N. H., Nov. 1851, IV. 90. 
T. transversa, ovata, tenuis, valde hians, convexiuscula, concentrice striata, 
erubescens; apicibus antemedianis; latere antico semiovali; latere postico 
iangulari ; intus miniata ; 
Shell transversely ovate, thin, widely gaping posteriorly, slightly 
Convex, delicately striate concentrically, with vestiges of numerous 
radiating stris ; deep roseate at the beaks and across the middle of 
disks, and zoned with roseate elsewhere: beaks anterior, acute 5 
anterior end semioval ; posterior end ovate-triangular, acute at tip, 
Which is near the median height; dorsal margin slightly declin- 
ing; ventral margin a little depending at middle. Interior brigh 
Tose-red throughout : siphonal sinus opposite the middle of sa v E 
tral margin, pyramidal and truncated at tip. Hinge with two ^ 
cate, diverging, equal cardinal teeth in each valve ; nymphe strongly 
developed. 
Diam. longitudinal two inches; vertical one and one fourth 
inches; transverse five eighths of an inch. 
Inhabis San Juan. Lieut. Green. ! i 
Compared with the analogous West India species, T. rosea, Gmel., 
it is longer, thinner, less lenticular, more inequilateral, mos sd 
minated Posteriorly, ventral and posterior margin less. -— 
arcuate ; color more roseate externally, and altogether so internally. 
