17 
cancellated, nucleus smooth. Aperture elongate, purple brown in 
the throat; outer lip sharp, yellowish, internally cen:iculated, 
with a prominent tooth at its outer edge. Columella purple, canal 
short, umbilicus nearly covered by the columellar callus. Siphonal 
fasciole strong. Externally painted with longitudinal broad black 
and narrow whitish streaks, interrupted by the white dental 
groove and 8 or 4 narrow yellowish revolving carinae, which, 
except the keel, are inconspicuously elevated. Lon. .55; Lat. ,33 
in. Habitat—Coronado Islands, off San Diego, California. Hemp- 
hill, 3 specimens.’’—Robert E. C. Stearns, Conchological memor- 
anda No 6 (May 18, 1871); Am J Conch 7:—(1871), with f. 
Exposed shingle beaches. Also at Todos Santos bay. 
(This species forms the link between the two preceding 
species. D.) 
154 Monoceros engonatum var. spiratum Blainv 
More common on sheltered rocky beaches. Santa Rosa Island 
to Todos Santos bay. 
155 Fusus Kobelti Dall, var. unicolor 
One specimen. San Diego. 
[It differs from the type in being more slender and in the ab- 
sence of the usual chocolate color on the larger riblets.—Dall. ] 
156 Siphonalia kellettii Fbs 
Very rare at San Diego, apparently abundant at Todos Santos 
bay, where large numbers of dead shells are washed avhore. 
[Dredged alive in 16 fathoms off Catalina Island harbor in 
1873.—Dall. ] 
157 Macron lividus A Ad 
Not rare near low water; ocean beaches. Also Todos Santos 
bay. 
158 Nassa fossata Gould 
Dead shells of this and the following abundant, apparently 
common in deep water. 
159 Nassa perpinguis Hinds 
San Diego. Also at Todos Santos bay. 
[Not rare at Catalina in 16 fathoms. D.] 
160 Nassa mendica var, cooperi Fbs 
Rare at low water at La Playa, also at Todos Santos bay. 
161 Mitra maura Swains 
Dead shells often washed ashore on the ocean beaches. Santa 
Barbara Islands. 
162 Erato vitellina Hds 
Not common. 
163 Erato columbella Mke 
False bay and La Playa. Rare. 
164 Marginella regularis Cpr 
San Diego. Not rare. Monterey. 
165 Marginella subtrigona Cpr 
San Diego. Rare. Monterey, and Santa Barbara, Cal. 
