424 



above, strongly protracted in its median part, columellar margin strongly contorted, with a 

 narrow, thin layer of enamel. 



Alt. 45, lat. 1574; apert. alt. 24, lat. 6 Mill. 



This species is very peculiar by its shape and sculpture. I find no allied forms, 



6. Sw^cida brachytoma n. sp. PI. XXVII, fig. 11. 



Stat. 284. 8°43'.iS., i27°i6'.7E. Timor-sea., 828 M. Grey mud. i Spec. 

 Stat. 300. io°48'.6S., i23°23'.iE. Timor-sea. 918 M. Fine grey mud. i Spec. 



Shell elongately fusiform, with long spire and short canal, strong, white under a greyish 

 epidermis. Nucleus wanting, remaining whorls 8, scarcely convex, their upper part excavated, 

 separated by a conspicuous, waved suture ; sculpture consisting of strong, rounded ribs, scarcely 

 appreciable in the excavation, 1 1 in number on last whorl, below the suture are short folds, 

 mainly corresponding to the ribs, with an intermediate one in the interstices; of spirals a stronger 

 one at the limit between ribbed part and excavation, making the ribs slightly tubercled, and 

 2 or 3 fainter ones lower on; base of last whorl with about 10 grooves; moreover the shell 

 is reticulated by numerous unequal, but always much finer spirals and growth-striae. Aperture 

 oblong, angular above, ending below in a wide, short canal, slightly directed to the left; peri- 

 stome strong, scarcely with a sinus above, which is uncommonly shallow, columellar margin 

 moderately flexuous, with a rather thick, smooth layer of enamel. 



Alt. 47, lat. 12Y3; apert. alt. 17721 l^t. 4 Mill. 



This species has much puzzled me; if the columella had been folded, I should have 

 taken it for a Mitra\ however Mr. Smith, who had the kindness to compare it, agrees with 

 me that it is a Surcula^ but not typical; the specimen from Stat. 284 is still very young, but 

 evidently belongs to the same species. I know no species that is allied. 



7. Surcula obhLsigemmata n. sp. PI. XXVII, fig. 12. 



Stat. "j^. 4°22'.iS., i8o°i6'.9E. Makassar-strait. 2029 M. Fine grey mud. i Spec. 



Stat. 137. Channel between Makjan and Halmahera. 472 M. Fine, dark muddy sand. 2 Spec. 



Stat. 271. 5°46'.7S., i34°o'E. Arafura-sea. 1788 M. Bluish green mud. i Spec. 



Shell broadly fusiform, with pyramidal spire and rather long, slender canal, thin, yellowish- 

 grey. Nucleus of largest specimen wanting, remaining whorls 6, not very convex, but apparently 

 so by a row of coarse, obtuse, rounded beads, near the base of upper whorls and the peri- 

 phery of last whorl, where they are 14 in number; a second row of small tubercles, rounded 

 in upper whorls, having the character of oblique folds on lower ones, runs just below the deep 

 suture, on a subsutural rib; lower on the shell is lirate, 2 faint lirae in the interstices of the 

 peripheral beads, 2 strong ones below the beads of last whorl and numerous fainter ones on 

 base and canal ; the shell is covered with very fine growth-lines, last whorl strongly attenuated 

 below. Aperture oval, angular above, ending in a rather long, narrow canal below ; peristome 

 thin, with a wide, rather shallow sinus above, then strongly protracted; columellar margin rather 

 straight, directed to the left near and along the canal, with a thin layer of white enamel. 



Alt. 22Y2, lat. 97^; apert. alt. 137^, lat. 37^ Mill. 



60 



