CLASS GASTROPODA 
49 
prolonged. Operculum size of the aperture. (Tryon, Manual of Con¬ 
eirology.) 
Type. ? 
Distribution. Tropical and subtropical. Fossil, Carboniferous. 
Vermicularia eburnea Reeve, 1842 
Conchologia Systematica, 2:46; PI. 152, fig. 2. 
Shell white, loosely whorled, with distant, subobsolete longitudinal 
sculpture. (Tryon, Manual of Conchology.) 
Type in Cuming Collection. Type locality, South America. 
Range. West coast, North, Central, and South America; San Pedro, 
California, to Panama. 
Genus ALETES Carpenter, 1857 
Whorls larger than in Section Macrophragama Carpenter; columella 
with a very faint, median, thread-like line; color usually yellowish brown, 
the early whorls chestnut. Operculum concave externally, with 5 to 6 
spiral laminae, the last abrupt; interiorly convex, shining, with irregular 
spiral lirae; muscular area irregular, opaque. (Tryon, Manual of Con¬ 
chology.) 
Type. Example: Vcrmetus carinatus Quoy. 
Distribution. West coast of North America; Peru; Galapagos 
Islands, Panama. 
Aletes squamigerus Carpenter, 1856 
Proceedings , Zoological Society of London, 226. Tryon, Manual of Conchology, 8:181; 
PI. 54, figs. 73, 74. 
A.t. majore, flavido-albida, solute spirali, plerumque glomerata; super- 
ficie costis spiralibus, squamis instructis; costilus pluribus intercalantibus, 
squamulis minoribus; squamis et squamulis imbricatis, arcuatis; interdum 
aperturam versus sculptura obsoleta. (Carpenter.) 
Yellowish white, usually conglomerated, loosely twisted, becoming 
erect, loosely longitudinally costate, with intermediate raised lines, scaly 
decussated, the erect anterior portion marked by rugose incremental striae 
only. (Tryon, Manual of Conchology .) 
Type in Santa Barbara, California. 
Range. Monterey, California, to Payta, Peru, and the Galapagos 
Islands. 
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