GASTEROPODA. 29 
C. ruser, Lin. Gould, 144, f. 24.  Midd., Malac. 
Rossic., i. 117.—Lamin. From Cape Cod north- 
ward. 
C. marmorevs, O. Fabr. F. et H. C. levigatus, Flem. 
Migh. C. fulminatus, Couth. Gould, 148, f, 23. — 
Litt. Lamin. From Cape Cod northward. 
C. menvicarius, Migh. et Ad., Bost. Jour., iv. 42, 1841. — 
Maine. 
Amicuta vestita, Gray. Chiton vestitus, Brod. et 
Sow., 1828. ©. Emersonii, Couth., 1838. Gould, 
151, f. 19.— Corall. From Cape Cod northward. 
Salem Harbor, in 20 f. gravel, ( Wh.) 
PATELLIDA. 
Pitiptum canpipum, St. Patella candida, Couth. Gould. 
—Corall. D.S. Coral. From Cape Cod northward. 
The shell of this species does not correspond with 
that of Propilidium ancyloide, to which it is referred 
by Forhes and Hanley. ‘There is perhaps some 
doubt as to the necessity of the genus Propilidium. 
This species occurred to me on stones in 40 f. off 
Grand Manan. It has short tentacles, destitute of 
eyes; a large foot; the mantle with a thick edge, 
fringed. (?) The liver is green; above which are scen 
the convolutions of the thick intestine, which sur- 
round it. The intestine is filled with a reddish 
brown mud, and the anus opens on the back of the 
neck. 
Trcrura TEsTUDINALIS, Gray. Patella t.. Mill. P. 
