MOLLTJSCA OF THE ' CHALLENGER EXPEDITION. 223 



glaze across the body nor round the base of the pillar ; but on 

 older specimens this may probably exist. Pillar is a little con- 

 cave, rather direct, with a thin rounded edge. Epidermis a very 

 thin and delicate calcareous membrane, obviously not extraneous ; 

 it adheres to the top of the spirals and stretches across their fur- 

 rows. It is sparsely cleft by minute gaping rents in the direc- 

 tion of the lines of growth, and the microscopic sculpture of the 

 shell is traceable in it, but rather on its under than its upper sur- 

 face. H.0-95. B. 0-28, least 0-25. Penultimate whorl, height 015. 

 Mouth, height 0'16, breadth 0'14. 



This species has some resemblance, both in form and sculpture, 

 to T. Jcnysnaensis, Krauss, but it is narrower, suture less im- 

 pressed, whorls not so convex ; the embryonic apex is very like, 

 but in the ' Challenger ' species it is a little more swollen and 

 depressed. 



4. TtJRRITELLA PHILIPPENSIS, n. sp. 



St. 161. April 1, 1874. Lat. 38° 22' 30" S., long. 144° 36' 30" E. 

 Off entrance to Port Philip, S. Australia. 38 fins. Sand. 



Shell. — A narrow cone ending a little abruptly in a sharp point, 

 profile Hues straight, base angulated and flat, of a sufi'used brown 

 colour with longitudinal brown flecks. Sculpture. Longitudinals 

 — fine, numerous, close, much-curved lines of growth. Spirals — 

 there is a slight angulated swelling at the top and bottom of each 

 whorl (that at the top being rather nearer the suture than that at 

 the bottom); between these the surface of the whorl is slightly 

 concave, with a flat feebly projecting band in the middle, the 

 upper and lower edge of which is defined by a spiral thread ; 

 besides these, which are absent in the upper whorls, the whole 

 surface is marked by irregular and unequal narrow and almost 

 obsolete spiral threads, which are stronger on the base. The 

 generic microscopic spirals are strong, but without delicacy or 

 depth. Colour ruddy light brown, with darker longitudinal 

 curved flecks ; on the upper whorls the centre of the whorl is 

 coloured and the top and bottom is white ; the three apical whorls 

 are porcellanous white. Spire perfectly conical in its profile lines. 

 Apex, the last whorl contracts suddenly and rises in a fine 

 rounded, but almost sharp, point. Whorls 11 ; but the shell is 

 not full-grown. They are almost flat on the sides, with a slight 

 angular contraction into the suture above and below ; the flat 

 base is angulated at the edge and is a little conical. Suture is 

 slightly impressed by a shallow broadish angular depression 



