16 SHELLS OF NEW ENGLAND. 
CYCLADIDA. 
Cycuas sruinis, Say. Gould, 72, f. 53. 
C. RHOMBOIDEA, Say. Adams, in Thomps. Hist. Ver- 
mont. 
C. eLecans, Adams. Gould, 74, f. 55. 
C. parTuMEIA, Say. Gould, 73, f. 54. 
C. peLtiucipa, Prime, MS.  C. calyculata, Adams, 
Thomps. Hist. Vermont. 
C. truncata, Lins. Gould, Am. Jour., 1848. 
C. orpicutaria, Barratt. Linsley, Conn. Cat. 
Pistpi1um puBium, Gould, in Agassiz’ Lake Superior, 
345.  Cyclias dubia, Say. Gould, 75, f. 56. 
P. minus, St. Cyclas minor, Ad. et Migh. 
P. Apamsi, Prime, MS. Cyclas nitida, Ad. et Migh. 
(preoc.) 
_ P. ventTricosum, Prime. Bost. Proc., iv. 68. 
KELLIADA. 
MontacuTa ELEvATA, St. M. bidentata, Gould, 59. 
(non Angl.) —Lamin. New Bedford Harb. (Shiv- 
erick.) On the sands of Chelsea Beach, thrown up 
alive, (W. 58.) It differs from MM. bidentata in the po- 
sition of the beaks, and in its proportions. 
Turtonra minuta, Alder. F. et H. Venus minuta, O. 
Fabr.— Litt. Mass. Bay. This species, not before 
noticed on our coast, I have found abundantly in 
June, about the roots of the fuci which cover the 
boulders at Point Shirley. 
