26 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.56. 



Range. — Station 3018, off Cape Tepoca, Lower California, in 36 

 fathoms, sand, bottom temperature 63.3° F. ; U. S. Bureau of Fish- 

 eries. 



CRASSISPIRA ARSINOE, new species. 



Plate 6, fig. 4. 



Shell biconic, acute, dark brown with paler projections and a red- 

 dish brown nucleus of two smooth whorls followed by nine subse- 

 quent whorls; suture closel}' appressed, obscure, somewhat undu- 

 lated with two fine threads and a garland of elongated paler nodules 

 between it and the constricted spirally grooved anal fasciole; other 

 spiral sculpture of on the last whorl sharp narrow channeled grooves 

 with wider flattish interspaces, which cut the axial sculpture into 

 nodules, there are half a dozen closer threads on the canal; there is 

 apart from the fasciole no finer spiral striation such as is found in 

 most of the species of the group; axial sculpture of (on the last 

 whorl about 14) feeble ribs beginning at the fasciole, obsolete on 

 the base and only prominent as single, double, or triple nodules at 

 the shoulder, there are four or five rather distant spiral rows of 

 nodules between the shoulder and the canal; the incremental lines 

 are very fine and sharp ; aperture narrow, anal sulcus wide and shal- 

 low with a marked subsutural callus; outer lip thin sharp, smooth 

 inside, with no very evident varix behind it; throat brownish, inner 

 lip and pillar with a smooth layer of enamel, the anterior edge raised 

 on the canal; the latter short wide, hardly differentiated from the 

 aperture. Height of shell, 17 ; of last whorl, 9.5 ; diameter, T.5 mm. 

 Cat. No. 56135, U.S.N.M. ' 



Range. — Bartolome Bay, Lower California, H. Hemphill. 



? CRASSISPIRA RUGITECTA Dall. 



Plate 7, fig. 6. 



Turris (C7-assispiya) rugitecta Dall. Proc. U. S. Nat. Mu.s., vol. 54, No. 

 2134, p. 226, April 5, 1918. 



Shell solid, acute, dark reddish brown, with a pale peripheral band 

 and eleven rapidly enlarging whorls exclusive of the (lost) nucleus; 

 suture closely appressed, obscure, with four or five strong spiral 

 cords between it and the anterior edge of the anal fasciole which is 

 moderately constricted; between this and the succeeding suture are 

 five or six rather close-set flattish cords, obsolete on the summits of 

 the ribs, the whole surface polished; on the last whorl there are 

 about 14 of these cords extending to the canal near which there are 

 a few intercalary smaller cords but no fine spiral striation; axial 

 sculpture of (on the last whorl 16) nearly vertical ribs with narrow 

 interspaces, beginning abruptly in front of the fasciole and becom- 

 ing obsolete on the base; incremental lines rather strong; anal sulcus 

 wide, rounded, not deep, separated from the suture by a strong 



