CLASS GASTROPODA 
239 
lip, and 14 to 16 on the inner. Length, 11.5; breadth, 8.6; height, 7.2 mm. 
(Raymond.) 
Type in University of California. Type locality, 60 fathoms off Cata¬ 
lina Island, California. 
Range. Monterey to San Pedro, California, to Cortez Bank. 
Trivia sanguinea Gray, 1832 
Descriptive Catalogue of Recent Shells, Cypraea. Tryon, Manual of Conchology, 7: 203. 
Ovate, purple-brown, back stained in the middle with a blood-red spot, 
whitish at each end, ribs whitish, dorsal impression almost obsolete. 
Length, .35-5 inch. (Tryon, Manual of Conchology.) 
Type in Museum Cuming. Type locality, St. Elena, West Colombia. 
Range. Catalina Island, Magdalena Bay to Salina Cruz, Mexico; 
Ecuador. 
Genus ERATO Risso, 1827 
Shell obovate, polished; spire short, conical, distinct; aperture linear; 
outer lip without varix, but thickened towards the middle, and denticulated 
within; columella with distinct plaits at the fore-part. (Tryon, Structural 
and Systematic Conchology .) 
Type. Erato laevis Donovan. 
Distribution. Europe, West Indies, South Africa, Indian Ocean, 
Philippines, Polynesia, tropical western America, California. Fossil, 
Eocene—Europe, South Australia, North America. 
Erato vitellina Hinds, 1844 
Zoology of the Voyage of H. M. S. Sulphur, PI. 13, figs. 22, 23. 
Testa obeso-ovata, caeruleo-rufescente; spira retusa; labio incrassato, 
grosse vii-dentato; columella, granulata; apertura inferne dilatata, ad basin 
effusa. (Hinds.) 
This is the largest species hitherto described, but is not otherwise very 
prominently distinguished. It possesses the peculiar livid color common 
to most of the species, varying to white near the sutures and at the back 
of the lip; the latter is of a horny-green color. (Hinds.) 
Range. Bodega Bay, and Farallon Islands to San Diego, California. 
Erato albescens Dali, 1905 
Nautilus, 18:124. 
Shell whitish, thin and polished, with four whorls; the spire low and 
nearly covered with a thin glaze extending from near the aperture; shell 
[ 537 ] 
