68 MOLLUSCA. 
widely reflected, flexuous in its course, not decidedly flattened. 
Throat pale violet or slightly livid. 
Diameter over three-fifths of an inch; axis two-fifths of an inch. 
Found in Oregon, at Astoria and Fort George, on the Columbia 
River, by Dr. Pickering and Mr. Drayton. 
This is one of the shells from beyond the Rocky Mountains, corre- 
sponding in types found on the Atlantic slope. It is closely allied 
to H. palliata, but is smaller, more convex beneath, and lacks the 
columellar tooth. It is still somewhat doubtful if it is really distinct 
from H. colhumbiana, which may possibly have been described from 
small, denuded specimens, but I cannot, with a magnifier, discover on 
Mr. Lea’s specimens the papille on which hairs might have been 
situated, and which are so readily seen in this species. The lip is 
also considerably broader, and peculiarly flexuous. 
Figure 35, animal with the shell; 35a, 35 6, two views of the shell ; 
35, portion of the shell magnified. 
Hetix Loricata (Gould). 
Testa parva, depressa, flavo-viridis, arcte umbilicata, squamulis undique 
loricata, subtus conveza: spira anfractibus quinque cum dimidio con- 
vexiusculis, arcté volutatis, ultimo superné ad peripheriam subangu- 
lato: apertura contracta, lunata, trilobata, dente laterah, dente basal, 
et dente columellari lamelliformi ringens ; peristomate albo, reflexo, 
callo copioso conjuncto. 
Heliz loricata, Goutp; Proceed. Boston Soc. Nat. Hist., 1. 165. 
Aug. 1846. Expedition Shells, 17; Binney; Land Mollusks, 11. 145, 
pl. 29:4; f.,2: 
SHELL small, depressed, spire less convex than the base, thin, of a 
yellowish-green colour, having the surface everywhere ornamented 
with small, crescentic scales of the epidermis, in relief, arranged along 
the lines of growth in quincunx. Whorls five and a half, shehtly 
convex, separated by a deeply impressed suture, and forming a low 
conical spire ; the periphery of the last whorl is angular near its poste- 
