64 Russell's Familiar Notice of some of the 



PATELLA. Latin, a littte basin. > (Both in allusion to its 



ALVEUS. Conrad. Latin, a trough. $ figure.) 



SYN. PATELLOIDEA. (Gaimard.) See " Couthouy's Remarks 



on two species of Patelloidea." Boston Journ. Nat. Hist. 



Vol. ii., p. 171, &c. 



A delicate, semitransparent, small shell, beautifully diversified 

 in markings, spotted with white, scarcely exceeding one fourth 

 of an inch in length. 



Abundant on the sandy shores of the vicinity, especially near 

 Orne's Point, North Salern, and contiguous to the Marine Rail- 

 way, South Salem. 



Journ. Acad. Nat. Sc. Phil., vol. vi., page 267, plate xi., fig. 

 20. 



Cabinet of Boston Society of Nat. Hist., No. 777. 



Cabinet of the Society. 



PATELLA AMCENA. Say. Latin, pleasant, delightful, (signifi- 

 cant of its beauty.) 

 SYN. PATELLOIDEA. Gaimard. 



A larger, thicker and more showy species than the preceding, 

 and not so common. Within, variously marked with brown and 

 white, sometimes with a deep margin of pure white. 



Obtained by searching at low tide among the rocks, to which 

 it will be found closely adhering. 



Lynn beaches and other rocky shores on the coast of New 

 England. 



Described by Say, in Journ. Acad. Nat. Sc., Phil., vol. ii., 

 p. 223. 



Cabinet of the Society. 



CREPIDULA. Latin, a little slipper. 

 FORNICATA. Latin, an arch. 

 Arched or convex Crepidula. 



A Genus nearly related to Patella, yet quite distinct. Adhe- 

 rent to various marine substances, this shell seldom quits its res- 

 idence ; a striking similarity in habits to the preceeding. 



The present species bears no unapt resemblance to a boat, 

 with a small half deck ; being more convex than most others. 



