17 



cancellated, nucleus smooth. Aperture elongate, purple brown in 

 the throat; outer lip sharp, yellowish, internally denaculated, 

 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 3 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 shingl« 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 ashore. 



[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 col umbel la 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. 



