114 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
calantibus; lineis incremente minoribus decussantibus; margine acuto; 
apertura plerumque rotundata: cicatrice musculari a margine parum re- 
mota, regione capitis valde interrupta. Long., 7; lat., 46; alt., 33 poll. 
(Carpenter.) 
A somewhat higher form, less worn by attrition, but having the essen¬ 
tial characters of H . cranioides. (Tryon, Manual of Conchology.) 
Type in Mrs. Boyce's Collection, Utica, New York. Type locality, 
Santa Barbara, California. , 
Range. Crescent City, California, to San Diego. 
Hipponix barbata Sowerby, 1835 
Proceedings, Zoological Society of London, 5; 1835. Tryon, Manual of Conchology, 
8:135; PI. 40, figs. 2, 3. 
Hipp. testa pallide fulva, subelevato-conica, radiatim confertim striata; 
margine ventrali producto; epidermide piloso-barbata; margine interno 
crenulato. (Sowerby.) 
Shell depressed, apex suberect, subposterior, whitish, concentrically 
and radiately striated, with a pilose brownish epidermis, aperture margin 
smooth. Length, .75 inch. (Tryon, Manual of Conchology .) 
Type in Museum Cuming. Type locality, coral reefs around Too- 
bouai, one of the Society Islands. 
Range. Crescent City, California, to Panama and the Galapagos 
Islands. 
Family CALYPTRAEIDAE 
Genus CALYPTRAEA Lamarck, 1799 
Shell oval, limpet-like; with a posterior, oblique, marginal apex; in¬ 
terior polished, with a shelly partition covering its posterior half. (Wood¬ 
ward, Manual of the Mollusca.) 
Type. Calyptraea chcncnsis Linnaeus. 
Distribution. West Indies, Honduras, Mediterranean, West Africa, 
Cape, India, Australia, West America. 
Calyptraea contorta Carpenter, 1865 
Proceedings of the California Academy of Sciences, 3:215. 
G.t. parva, tenui, albida; vertice nucleoso planato, extante, minimo, 
anfr. uno et dimidio planorbi-vormibus, apice conspicuo; dein conoidea, 
elevata, solute spirali, suturis impressis; superficie rudi, laminis incre- 
17161 
