NO. 2207. WEST AMERICAN MELANELLID MOLLUSKS—BARTSCII. 303 



poriphory, so that tho basal portion is behind the piano of tho pe- 

 ripheral edge; inner lip short, moderately thick, curved and slightly 

 reflected over the base, the reflected portion fusing with tho thin 

 parietal callus. 



Two specimens of this species (Cat. No. 132072), are in tho collec- 

 tion of the United States National Museum. They came from tho 

 Gulf of California. Both have lost their tips; one of these, the type, 

 has 10^ whorls remaining, and measures — length, 20 mm.; diameter, 

 7.5 mm. This is the largest species so far known from the west 

 coast of America. 



MELANELLA (MELANELLA) MICANS Carpenter. 



Plate 34, figs. 1-6. 

 Eulima micans Carpenter, Rep. Brit. Ass. Adv. Sci. (1863) 1864, p. 659; Proc. 

 Phila. Acad. Nat. Sci., 1865, p. 63. 



Shell straight, elongate-conic, bluish-white when the animal has 

 been removed. When the animal has been allowed to dry in the sheU, 

 it appears tlirough the substance of the shell and gives it a mottled 

 brownish aspect. The brownish coloration when present usually 

 extends over the upper half of the specimen. Whorls flattened, 

 decidedly appressed at the summit. Sutures appearing as a very 

 fine impressed line. Base moderately long, well rounded. Aperture 

 oval; posterior angle very acute; outer lip thin at the edge, bent back 

 immediately below the summit, then forward to form a claw-shaped 

 element, the center of which coincides with the periphery; there is 

 another backward deflection of the outer lip at its junction with the 

 inner lip which is moderately strong, curved and t^^^sted and partly 

 reflected over and adnate to the base; parietal wall covered ^\^th a 

 moderately thick callus. 



The tyi^e and another specimen (Cat. No. 14850, U.S.N.M.) were 

 collected by Doctor Cooper, at San Pedro, California. The type has 

 four whorls and measures — length, 9.5 mm.; diameter, 3 mm. An 

 adult specimen (Cat. No. 15317, U.S.N.M.), having 15 whorls, meas- 

 ures — length, 12.5 mm.; diameter, 4 mm. The present form ranges 

 over the Oregonian and Californian fauna! areas, decreasing in size 

 from the north, southward. Geologically it is knowTi from the upper 

 and lower San Pedro series of California. 



The following specimens have been examined: 



> 1 Type. 



