278 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
Type in United States National Museum, No. 211068. Type locality, 
United States Fish Commission, Station 3180, in the Gulf of the Farallones, 
off San Francisco, California, in 24 fathoms. 
Range. Straits of Juan de Fuca to Coronado Islands. 
Genus AESOPUS Gould, 1860 
Testa fusiformis, gibbosa, antice late truncata; apertura lunata, angulo 
postico callo impleto; columella simplici vitreo induta; sutura prope aper- 
turam abnormaliter arcuata. (Gould.) 
Shell fusiform, gibbous, widely truncate in front; aperture lunate, 
with a posterior callus, columella simple, vitreous; suture abnormally 
arcuate near the aperture. The curious curve of the suture near the pos¬ 
terior angle of the aperture, as if it had been drawn backward, thereby 
pulling back this angle and curving the last whorl downward, is very 
peculiar. (Tryon, Manual of Conchology.) 
Type. Aesopus japonicus Gould. 
Distribution. California, Lower California, Panama, Japan. 
Aesopus eurytoides Carpenter, 1864 
Annals and Magazine of Natural History, scries 3, 14:47. 
T. testa parva, turrita, gracili; albida, saepius fascia circa peripheriam 
maculis fusco-aurantiacis picta; anfr. nucl. mamillatis, lavibus; norm, v., 
effusis, subplanatis, ultimopaulum constricto; costulis radiantibus circ. xx., 
aperturam versus evanidis; apertura subquadrata; labro haud incrassato, 
interdum intus subtiliter striato, haud dentato; labio appresso; columella 
abrupte truncata. Long., .03; long, spir., .02; lat., .11 poll. (Carpenter.) 
Variat basi fusco tincta, seu tota superficie ut in Nitidella cribraria 
picta. (Carpenter.) 
White, with a revolving series of brown maculations on the periphery; 
sometimes the base is brown, or the whole surface brown-spotted; with 
about twenty longitudinal riblets, becoming evanescent toward the aper¬ 
ture; aperture subquadrate, lip scarcely thickened, striae finely within, 
columella abruptly truncate. Length, .3 in. (Tryon, Manual of Con¬ 
chology .) 
Type in British Museum? Type locality, Cape San Lucas, Lower 
California. 
Range. San Diego, California, to Panama. 
Described as Truncaria eurytoides. 
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