CLASS GASTROPODA 
191 
Volutopsius callorhina stejnegeri Dali, 1884 
Proceedings of the United States National Museum, 7 :346; PI. 2, fig. 5. 
It is slightly more elongated than the original specimen from the 
Callorhinus rookery at St. Paul Island, and presents other characters, 
which, if constant, would separate it perhaps specifically. The shell has 
five and a half whorls (the nucleus is gone) and presents indications of 
about nine, obscure, irregular, transverse ribs; the surface sculpture where 
preserved is fine and sharp, like that of Chrysodomus kroyeri; the epider¬ 
mis pale brown, extremely thin, and dehiscent. The shell has a grayish- 
green tint, perhaps partly from a confervoid growth, the aperture as in 
my figure of Strombella callorhina, the margin inside yellowish, the throat 
livid white, the columellar side with a touch of dull purple. Long, of 
shell, 60; of last whorl, 40; of aperture, 28.5 mm. (Dali.) 
Type in United States National Museum, No. 40935. Type locality, 
St. Paul Island, Pribilof Islands. 
Range. Known only from type locality. 
Volutopsius regularis Dali, 1878 
Plate 4, fig. 6 
Proceedings of the California Academy of Sciences, 5 :60; PL 2, fig. 6. 
Shell of four whorls, obtusely fusiform, and with the last whorl 
somewhat inflated. Nucleus mammillated, whorls smooth, moderately 
convex, with a distinct, though not channeled suture. Aperture eleven- 
seventeenths the length of the shell, elongate, produced in front, with 
the outer lip moderately thickened and the inner lip without callus. Canal 
almost straight; short narrow. Long., 1.8; lat., .9 in. 
Type in United States National Museum. Type locality, Unalaska. 
Range. Pribilof, Aleutian, and Sannak Islands, Alaska. 
Described as Volutopsis beringi regularis . 
Volutopsius castaneus Morch, 1858 
Plate 4, fig. 2 
Novitates Conchologia Mollusca Marina, 7; PL 1, figs. 1, 2. 
N. testa ovata, badia tenui, laeviuscula, spira exserta, apice obtusa; 
anfractibus senis convexis sutura profunda divisis, plicis increment haud 
regularibus instructis, ultimo peramplo; apertura magna oblonga; colum¬ 
ella parum sinuata paullum callosa; cauda brevi lata subcurvata; labro 
simplici; faucibus lacteis, subroseis. Neptunea castanea Morch in sched. 
Ex insula Sitka Exstata in collectione clar. Romberg Hamburgensis. 
[1911 
