GASTEROPODA. 379 
Figure 483, animal, with the shell, seen from beneath ; 483 a, aper- 
ture of the shell, normal form; 483 }, 483 c, outlines of a variety. 
CaLYPTR&#A FasTiciata (Gould). 
Testa parva, tenuis, levis, rotundata, elevato-conica, concentricé et 
tenuissime striata, epidermide fuscescente induta.; spird anfractibus 
tribus planulatis, apice sub-mediano, acuto : lamella interna spirals, 
striata ; margine soluto, ad centrum duplicato, haud appresso, umbil- 
cum parvum efformante. 
Calyptrea fastigiata, Goutp ; Proceed. Boston Soc. Nat. Hist., 11. 
161. August 1846. Expedition Shells, 15. 
SHELL small, thin, smooth, rounded at base, elevated-conical; the 
apex central, acute; the spire composed of three flattened whorls. 
Surface faintly marked by very delicate lines of growth, and covered 
by a thin, pale-yellow epidermis. Interior white, with a spiral 
lamella (septum) commencing at the vertex, and making half a revo- 
lution, terminating at the margin; its free edge folded. 
Diameter half an inch; altitude five-eighths of an inch. 
Inhabits Puget Sound, Oregon. 
In shape, size, and interior, scarcely differing from C. pileolus, 
D’Orbigny. But that shell has a rough surface, is white, and is 
ribbed about the vertex. It is also like C. sguama, Deshayes. 
Figures 484, 484, 4840, dorsal, basal, and lateral views of the 
shell. 
Hipponix impricata (Gould). 
Testa solida, obliqué elevato-conica, rubescens, costults acutis radiantibus 
quadraginta ad quinquaginta, et lamellis concentricts concinne wmbrr- 
cato-clathrata ; apice submediano: apertura rotundata-ovata: intus 
coccinea. 
