66 Russell's Familiar Notice of some of Ike 



VELUTINA. Blainville. SYN. GALERICULUM. Brown. 



RUPICOLA. Latin, living on rocks. 



Rock Velutina. 



A very delicate shell, first discovered by Dr. Charles Picker- 

 ing, (formerly of this city,) on the shores of this vicinity, affixed 

 to rocks. 



Fragile, almost transparent, covered with a brown epidermis ; 

 aperture very large, left side slightly reflexed into an apparent 

 ootumella : whorls, two first small, body whorl large. 



Is not this Oxynoe glabra; Couthouyl Of four specimens in 

 my possession, no two are exactly similar. One is covered with 

 the epidermis, and was taken from an haddock's stomach, from 15 

 fathoms ^of water. The three others collected at Phillips' beach 

 by J. True, though evidently the same species, yet vary in them- 

 selves. The smallest, a little more than 0.02 inch long, has no 

 perceptible reflexion, is covered with an epidermis, and has a 

 dozeji or more raised longitudinal striae, which by comparison 

 with the next specimen, seem confined to the epidermis ; its 

 margin more reflexed; the last smooth, with minute striae, light 

 rose color. This gradation in the form of the left margin would 

 seem to agree with Blainville's description of Velutina, which 

 although " Sans collumelle," yet presents, ( 'ledroit se reunis- 

 sant au gauche, par un depot calcaire, lamelleux." 



These shells are worthy of being searched for, and would con- 

 stitute no mean addition to any collection. A very fine speci- 

 men of extra size is in possession of Wm. Oakes, gathered by 

 him on Ipswich beach. 



Described and figured in Journ. Acad. Nat. Sc. Phil., vol vi., 

 p. 266, pi. xi., figs. 17, 18, by T. A. Conrad. 



See also Blainville's Malacologie, Art : Velutina, p. 469, and 

 forCouthouy's Oxynoe Glabra, see Boston Journ. Nat. Hist., 

 vol. ii., p. 90. Gould's Report, &c., April, 1838, Catal : New 

 Shells. 



The Marine Shells only, of the order TRACHELIPODA, are de- 

 scribed, as follows. 



