MARINE MOLLUSCA OF THE UNITED STATES. 59 
nearly closed and consisting only of an arcuated, linear, vertical, 
aperture. 
Length about 6 mill. 
Buzzard’s Bay. Dredged in three to eight fathoms. (Stimpson.) 
Massachusetts to N. Carolina. 
Genus LUNATIA, Gray. 
Zool. Proc. 1847. 
1. L. HEROS, Say. Fig. 96, 97 (triseriata), 98 (Nidus), 99 (Ani- 
mal). 
(Natica.) Journ. Philada. Acad., ii. 248. 1822. 
N. catenoides, 8. Wood, 1848 (teste Jeffreys. ) 
Var. N. triseriata Say. Journ. Phila. Acad., v. 209. 
Shell large, thick, globular-ovate; whorls five, convex; spire 
considerably elevated. Aperture oval; the callus reflected over a 
small portion of the large, patulous, and coarsely wrinkled um- 
bilicus, Epidermis thin and yellowish; beneath this, ashen gray. 
Aperture dark reddish-brown occasionally tinged with yellowish. 
Occasionally grows to the length of five inches. The young 
shell is sometimes marked by three revolving series of parallel 
oblong brown spots, twelve or fourteen in each row (N. triseriata). 
These markings are lost on the subsequent whorls. 
The nidus is composed of sand agglutinated into a bowl-shaped 
mass, open at the top. The eggs are attached tothe interior sur- 
face. 
This may be the N.ampullaria of Lamarck, as surmised by some 
of our conchologists, but the description does not sufficiently 
characterize it. 
New England, southward to New Jersey. 
2. L. Granuanpica, Moller. Fig. 100. 
(Natica.) Faun. Grenl., 7. 1842. 
Nalica pusilla, Gould (not Say), Invert. Mass., edit. i. 287, f. 166. 1841. 
Shell suboval, smooth, glossy or with faint incremental and re- 
volving lines; whorls four, regularly rounded; spire moderately 
elevated, obtuse; suture distinct and deep; lip sharp, acute; callus 
pressed laterally into the umbilicus, leaving a narrow curved linear 
opening. Epidermis ash-colored, beneath bluish-white. 
Length 12.5, diam. 11 mill. 
Massachusetts northwards. 
