CLASS GASTROPODA 
129 
with an obscure, nearly obsolete, spiral sculpture like flattened-out threads, 
over which run microscopic, close-set, spiral striae; suture with the whorl 
in front of it feebly channeled and the excavation bounded by an obsolete 
thread; top of the whorls flattened, part of the base bordering the umbili¬ 
cus also flattish, the remainder of the whorl rounded, turgid; umbilicus 
wide and deep, its walls excavated and closely spirally striated aperture 
oblique, semi-lunate, outer lip thin, base rounded; the angle where the 
lip meets the body filled with a smooth white callus, the anterior angle of 
the pillar lip also thickened. Height of shell, 51.0; of last whorl, 49.0; of 
aperture, 44.0; maximum width of shell, 50.0 mm. (Dali.) 
Type in United States National Museum, No. 172859. Type locality, 
Drake's Bay, California. 
Range. Port Althorp, Alaska, to Catalina Island, California. 
Subgenus Neverita Risso, 1826 
Polinices recluzianus Deshayes, 1841 
Guerin, Magasin de Zodlogic, Mollusca, PI. 37. 
Testa ovata-conoidea, turgida, levigata, substriatave, griseo-plumbea, 
basi albescente, ad suturam zona fusca circumdata, umbilico magno, callo 
maximo semiclauso, callo sulco inaequaliter bipartito, columella superne 
callosissima, superne, alba interne macula fusca nautata, apertura occato- 
semilunari, superne canaculata intus albo-fuscescente. (Deshayes.) 
Shell solid, conically globose, columella strongly callous from the su¬ 
perior function of the outer lip, nearly filling the umbilicus; fawn-color, 
or yellowish-brown, lighter or whitish below, interior chocolate, callus 
usually white. Length, 3 in. (Tryon, Manual of Conchology.) 
Type in ? Type locality, Mers de Californie. 
Range. Crescent City, California, to Tres Marias Islands, to Chile. 
Polinices recluzianus imperforata Stearns, 1909 
U. S. Geological Survey, Professional Paper, 59:88. 
In the variety imperforata found living in the vicinity of San Diego, 
and in the Pleistocene of the upper San Pedro at Deadmans Island, there 
is an additional thin deposit of callus filling the open part of the umbilicus 
and overflowing on the adjacent portion of the base. (Dali.) 
Type in United States National Museum. Type locality, San Diego, 
California. 
Range. Crescent City to San Diego, California. 
[ 731 ] 
