SYKES: ON NEW MAEGINELLID^ AND PLEUEOTOMID^. 317 



Long. 8 mm. ; diam. max. 4 mm. 



J?« J. _" Porcupine " Expedition, 1870, Station 24, ofE Cape 

 St. Vincent, in 292 fathoms. 



A species with no very salient characters. As compared with the 

 forms described and noticed by Locard,^ it differs fi'om M. impudica, 

 Fischer, in its much smaller size, as also in shape ; from M. Marocana, 

 Loc, in its more pyramidal shape and in the relative length of the 

 earlier whorls ; from M. crustata, Loc, in its more slender form and 

 more produced spire ; from M.parvula, Loc, in the relative proportions 

 of the spii'e and body- whorl, etc. 



I have seen five adult shells and five young. 



Genota vafka, n.sp. PI. XVII, Fig. 9. 



Shell elongate, mitriform, spire well produced ; apex acute ; pale 

 yellow, with brown bands ; sculpture, protoconch smooth, the next 

 few whorls marked by spirals with a few oblique longitudinals, the 

 whorls slightly angulated in the middle ; gradually these longitudinals 

 become stronger, until on the penultimate whorl there is a row of 

 nodules just below the suture, followed by a few spirals and another 

 row of larger nodules below ; the last whorl has, in addition to this 

 sculpture, a number of smaller nodules aiTanged in regular spiral, as 

 also arcuate longitudinal, rows, these being continued to the base of the 

 shell ; whorls 10, plano-convex ; aperture elongate, naiTow, fairly 

 straight, with a well-marked, wide notch below the suture. 



Long. 31 'o mm. ; diam. max. 10 mm. 



Hah. — "West Africa (Keppel). 



Eelated both to G. mitrccformis, Kien., and G. papaJis, Eve. As 

 compared with these the present shell may be separated by its less 

 produced spire, the conspicuous rows of granules or nodules on the last 

 whorl, and the well-marked double row of nodules on the upper whorls. 



PrSIONELLA EEMOKATA, n.Sp. PI. XVII, Fig. 11. 



Shell elongate, turreted, fairly solid, shining, pale yellowish-white ; 

 protoconch acute, polished, whitish, smooth ; sculpture, 3-4 spirals on 

 the earlier whorls, mainly collected below the sutures ; on the last 

 whorl, in addition, about 6 spirals encircle the base, and indications of 

 others are seen between the two series ; the second, third, and fourth 

 whorls also show traces of longitudinal sculpture, which appears on 

 the later whorls only as lines of growth; whorls 11|, flat, the last 

 measuring just over half the length of the shell ; aperture ovate, with 

 a short canal, lip thin. 



Long. 38 mm.; diam. max. 13 mm. 



Hab. — West Africa (Keppel). 



The nearest ally appears to be the shell described by Petit ^ as Fimis 

 Mtlleti, but the present species is a trifle more slender, the whorls are 

 not so tabulate, and the longitudinal sculpture to which that author 

 refers is almost entirely lacking. 



' Exped. Scient. Trav. Talisman, vol. i. 

 2 Journ. Conchy]., 1851, p. 77, pi. i, fig. 6. 



