SYKES : MOLLUSCA OF " PORCUPINE " EXPEDITIONS. 183 



Pleueotomella ? n.sp. 

 Two specimens from the cruise of 1870, Station 17, seem worthy of 

 being noticed. They are very young apparently, and belong to the 

 group of P. subaraneosa, Dautz. & Fischer, but they differ from all 

 other forms of this group known to me in the fact that the spirals are 

 almost obsolete and only traces of them are seen. So little is yet 

 known of the variation in this group that I have not endowed them 

 with a specific name. 



Spiroteopis clytoteopis, n.sp. PL XVI, Figs. 4, 4ff. 



Shell elongate fusiform, pale brownish white (dead), spire well 

 produced. Whorls 5, angulated and convex. Protoconch of two 

 whorls, large, glassy, and bulbous, smooth save for indistinct traces of 

 microscopic spirals. The remaining whorls are strongly, angulated 

 and carinated at the peripherj-, this carina appears on the later whorls 

 as if duplex ; below this carina is a second, smaller one, and two more 

 are obscurely indicated below. The mouth is strongly angled, and the 

 canal is spout-like and slightly twisted. Long. 8, lat. vix 4 mm. 



"Porcupine" Expedition, 1870, Station 17. 



Eleven specimens, all, except the type, being very young. Akin 

 to the well-known S. modiola, Jan, but slightly broader in proportion 

 to the length. Further, the present shell may be distinguished by 

 the additional spirals below the carina, which are not present in 

 S. modiola, Jan ; the canal is also more produced in S. chjtotropis. 



We may compare the sculpture with that of S. monotropis, Dautz. & 

 Fischer, which appears to be a more elongate shell, with a small and 

 pointed protoconch. 



Spiroteopis (?) megalacme, n.sp. PI. XVI, Figs. 5, 5«. 



Shell small, conical-fusiform, spire well raised, fairly solid. Colour 

 (dead) whitish-brown, with a white protoconch. Whorls 6, turreted, 

 regularly increasing. Protoconch large, white, the first whorl and 

 a half smooth, then closely-set longitudinal riblets are seen, and the 

 whorl becomes carinate. The remaining whorls are acutely carinate, 

 with an area below the suture, either smooth or with arcuate striae : 

 below the carina appear numerous longitudinal riblets, decussated by 

 spiral carinations, giving the shell a somewhat prickly or nodulous 

 appearance. The mouth is small, with a well-marked sinuation above ; 

 columella vertical, a little twisted at the base. Long. 5, lat. 2*5 mm. 



"Porcupine" Expedition, 1870, Station 17. 



Four specimens, three being immature. The details as to the 

 protoconch are taken from a younger specimen than the type. 



Spiroteopis (?) Melvilli, n.sp. PI. XVI, Figs. 6, Qa. 

 Shell small, elongate, spire well raised, varying a good deal in the 

 relative proportions of length and breadth ; colour hyaline white. 

 Whorls 6, turreted, carinated, regularly but slowly increasing, suture 

 well marked, with a small strap-like rim below it. Protoconch large, 

 white, smooth, elevated. The remaining whorls are marked by 

 a strong spiral keel, which is either smooth or bears acute nodules ; 



