A. PEBC09ICU8 Dall. IM. IS, \\- 



Slu'll pear-shaped <r conic, with ratlin- am; -li-ln-d ivory 



white, with lour whorls br.-idi- the niicleu- ; t -ml jiture of 



incremental lines ; spiral sculpture of three to live closc-x-t, sharp, 

 punctate grooves in front of the suture, m<>iv di-tant anteriorly, and 

 a similar hut more numerous and uniformly spaced si-rii-> just behind 

 the pillar, behind which again are four or five widely separated 

 similar grooves the posterior near the periphery ; between them and 

 near the periphery, as well as behind it, are no -rooves or but faint 

 spiral obsolete stride; suture distinct but not channelled ; la.-t whorl 

 much the largest; outer lip straight, simple, slightlv thickened; 

 body with a moderate deposit of callus; pillar as in A.curtnluM, but 

 less strongly twisted and with the plait and recurved margin sub- 

 equal ; although the margin is continuous, there is a rather deep 

 sulcus behind the anterior end of the pillar, corresponding to a 

 groove, which bounds the columella callus; longitude of shell, 5; 

 latitude, 3 ; longitude of aperture, 3 mill. (Dall). 



Near Galapagos Is., in 812 fms. (Albatross). 



A. perconicus DALL, Proc. U. S. Nat. Mus. xii, p. 296, pi. 12, f. 7, 

 1889. 



This shell and the last species seem to stand in an intermediate 

 position between Actceon of the typical kind and Cinulia. If the 

 outer lip should eventually become much thickened, of which, how- 

 ever, there is no satisfactory evidence, these shells might be referred 

 to Cinulia. If the A. curtulus recalls Pedipes mimbilis Muhlfeldt 

 in its form and sculpture, A. perconieus recalls P. elongatus Dall. 

 (Dall). 



A. OVULUM Pfeiffer. 



Shell small, ovate, shining, white ; spire conic. Whorls 6, nearly 

 flat, the last three times the length of the spire. Columella Implicate 

 at base. Aperture entire, oblong, narrow; lip simple, widened in 

 the middle. Length 1'66, diam. -75 mill. (Pfr.'). 



Cuba. 



Tornatella ovulum PFR., Arch. f. Nat urg. vi, 1 S40, p. '2 :>('>. .1 i-taeon 

 (Actceonideat) ovulum MORCH, Mai. Bl. xxii, p. 170. 



Da!l (Blake Rep. Gastr., p. 41) remarks that this may be an im- 

 mature Marginella. 



ACTION AUSTRALIS Quoy-& Gaim. (Astrol. ii, p. 317), / 

 in Nudibranchiata. 

 12 



