NO. 2288. NEW M0LLU8KS OF THE FAMILY TVRRITIDAE—DALL. 19 



subsutural callus; outer lip thin, moderately arcuate, not varicose, 

 inner lip with a coat of enamel with the anterior edge raised; pillar 

 short, straight, the canal hardly differentiated from the aperture. 

 Height of shell, 14: of last whorl, 7; diameter, 5 mm. Cat. No. 

 56038, U.S.KM. 



Range. — On the beach at the head of the Gulf of California, col- 

 lected by Dr. E. Palmer. 



CLATHRODRILLIA (CARINODRILLIA) HALIPLEXA, new species. 



Plate 5, fig. 5. 



Shell with 12 whorls, excluding the (defective) nucleus, pale 

 brown, acute, with inconspicuous suture, with eight or nine prominent 

 axial ribs with equal or wider interspaces and faint incremental 

 lines; anal fasciole wide, constricted, a single strong cord and fine 

 spiral threads between it and the suture; in front of the fasciole are 

 about six strong cords slightly swollen as they override the ribs, with 

 much wider interspaces occupied by fine spiral threads, the cord at 

 the periphery stronger than the rest ; the base with threads of inter- 

 mediate size, close-set ; outer lip sharp, arcuate, undulate by the ends 

 of the spiral cords ; anal sulcus short, pear shaped with no subsutural 

 callus; body throat and pillar white, smooth, canal short, recurved. 

 Height of shell, 27: of last whorl, 13; diameter, 8 mm. Cat. No. 

 212355, U.S.N.M. 



Range. — Station 2824, near La Paz, Lower California, in 8 fath- 

 oms: U. S. Bureau of Fisheries steamer Albatross. 



7 CLATHRODRILUA (LAEVITECTUM) EBURNEA Carpenter. 



Plate 1?>, ag. 5. 



Drillia eburnea Cabpenteb, Proc. Zool. Soc. London, 186.5, p. 280; not 

 Pleurotoma ehurnea Bonelli, 1842. 



This differs from all the other species of the group in having all 

 the sculpture obsolete, so that the shell except on very close scrutiny 

 appears perfectly smooth except near the apex. The color is a pinkish 

 white, with a brownish decollate apex. I have been puzzled where to 

 put it, as it combines characters of several groups but feebly ex- 

 pressed. 



Range.— G\\\i of California, Rowell. Type, Cat. No. 22817, 

 U.S.N.M. 



? CLATHRODILLIA (KYLIX) ALCMENE, new species. 



Shell small, pinkish white, polished, acute, with a flat-topped 

 nucleus of two polished, prominently peripherally keeled whorls and 

 about eight subsequent whorls ; suture appressed, with a retractively 

 nodulous, thickened band in front of it, forming the posterior mar- 

 gin of the anal fasciole; sculpture of (on the last whorl 22) some- 

 what sigmoid rounded ribs with subequal interspaces, reaching from 



