164 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
Form as in E. variegata; but whorls, except the nuclear, very delicately 
striate, the last with about ten striae. (Tryon and Pilsbry, Manual of Con¬ 
ch ology.) 
Type in United States National Museum. Type locality, Cape San 
Lucas, Lower California. 
Range. Catalina Island, California, to Panama. 
Described as Eucosmia sub striata . 
Family TURBINIDAE 
Genus ASTRAEA Bolten, 1798 
Subgenus Pomaulax Gray, 1850 
Shell trochiform, elevated conic, angulated and nodose at the periphery, 
obliquely ribbed, not umbilicated; inner lip arcuated, with a wide callus, 
which is channeled, anteriorly truncated. Operculum with three radiating 
ribs and perforated axis. (Tryon and Pilsbry, Manual of Conchology.) 
This is the description of the subgenus Pomaulax . 
Type. Astraea undosa Wood. 
Distribution. North Pacific, America and Japan. 
Astraea undosus Wood, 1828 
Plate 102; Plate 103 
Index Tcstaceologicus, Supplement 16; PI. 5, Troclius, fig. 1. 
Shell large, conic, imperforate, white, covered with a strong obliquely 
lamellose corneous epidermis; whorls six to eight, planulate, with oblique 
radiating tuberculate costae above; periphery with an undulating nodose 
carina; base flattened, with three to five concentric corrugations; aperture 
subovate, very oblique, angular, pearly within; columella dilated, with a 
semicircular groove at the position of umbilicus, the umbilicated tract 
bounded by a white grooved ridge. Alt., 80; diam., 110 mm. (Tryon 
and Pilsbry, Manual of Conchology .) 
Type in ? Type locality, California. 
Range. San Pedro, California, to Cerros Island, Lower California. 
Subgenus Pachypoma Gray, 1850 
Astraea inaequalis Martyn, 1784 
Plate 108, figs. 1, 2 
Figures of Nondescript Shells, Universal Conchology, tablet 1, PI. 31. 
Shell conic, imperforate, rather solid, with a chestnut brown cuticle, 
lighter beneath; whorls six to seven, planulate above, sutures slightly im- 
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