NO. 22SS. JVEW AIOLLUSKS OF THE FAMILY TURRITIDAE—DALL. 6S 



adult type of four succeeding moderatelj^ rounded whorls separated 

 by a distinct, not appressed suture ; spiral sculpture of a prominent 

 sharp thread on the periphery slightly angulating it; above this on 

 the last whorl are two and below it on the base six or seven some- 

 what smaller threads with wider interspaces followed to the end of 

 the canal by a more adjacent series of similar threads; axial sculp- 

 ture of (about 10 on the last whorl) rounded ribs extending from 

 the suture over the base with much wider interspaces; incremental 

 lines close-set, sharp, minutely raised, giving a frosted effect to the 

 surface; aperture narrowly ovate, the outer lip thin, sharp, the 

 anal fasciole feebly indicated, the inner lip and pillar smooth, the 

 canal distinct, straight, short, and narrow. Height of shell, 4.25; 

 of last whorl, 2.75 ; diameter, 1.25 mm. Cat. No. 211384, U.S.N.M. 



Range.— ^iaiiow 2823, off La Paz, Lower California, in about 26 

 fathoms, broken shell. U. S. Bureau of Fisheries. 



It is possible that these shells may not be completely adult and 

 that the aperture may be modified later, but none of the many speci- 

 mens obtained show any indications of it. 



MANGILIA (KURTZIELLA) DANAE, new species. 

 Plate 21. fig. 6. 

 Shell minute, wdiitish, with a narrow brown band below the 

 periphery in front of which the suture is laid; nucleus small with 

 one and a half polished whorls followed by four and a half sculp- 

 tured whorls; suture distinct, undulated not appressed; spiral 

 sculpture of a strong cord at the periphery angulating the whorls, 

 with smaller threads (sometimes alternated) covering the rest of 

 the surface with about equal interspaces; spiral sculpture of (on the 

 last whorl 10) slightly sigmoid ribs, widest at the periphery, reach- 

 ing the suture and fading out on the base, with narroAver inter- 

 spaces; on th.e obscure anal fasciole the interspaces are markedly 

 concave; aperture narrow, the anal sulcus wide, shallow, the outer 

 lip varicose; the inner lip smooth, the pillar straight, the canal 

 hardly differentiated. Height of shell, 4.5; of Inst whorl, 3: di- 

 ameter, 1.7 mm. Cat. No. 265920, U.S.N.M. 

 Range.— Mwl&g^^ Gulf of California, Dr. Paul Bartsch. 



MANGILIA (KURTZIELLA) KEBE, new species. 

 Plate 20, fig. 10. 

 Shell small, yellowish white, slender, acute, with two smooth 

 nuclear and five or six subsequent whorls; spiral sculpture of fine 

 equal uniform threads covering the whole whorl separated by nar- 

 row grooves and given a frosty appearance by fine sharp incremental 

 lines; axial sculpture of (on the last whorl eight or nine) narrow 

 rounded ribs extended over the whole whorl with wider interspaces 



