^ EDGAR A. SMITH. 



Neobuccinum tenerum. 

 (PI. I., figs. 2, 2a.) 

 Shell small, ovately fusiform, thiu, subpellucid, horn-colour, covered with a very 

 thin periostracum, exhibiting somewhat remote, .slender, threadlike, arcuate, 

 longitudinal lirte, and rather obscure spiral striae between them. Whorls 6^ convex, 

 the first 2j, forming the large protoconch, smooth, glossy; the rest not shining, 

 separated only by a slightly oblique suture, the last rounded above, contracted 

 anteriorly ; aperture subpyriform, acuminate above, and produced anteriorly into a 

 short, open channel ; labrum just a trifle thickened, brownish white within, gently 

 curved in the middle when viewed laterally, very slightly faintly expanded, with a 

 very shallow, broad, indistinct sinuation towards the suture ; columella curved above, 

 rather straight below the middle, covered with a thin glossy callosity. Length, 15 

 millim. ; diam., 7; aperture, 6-5 long, 3-3 broad. Operculum (pi. I., fig. 2a) 

 horny, reddish brown, marked externally with lines of growth, and exhibiting a 

 nucleus which is paucispiral at the nuclear end. Lower surface roughened, with a 

 narrow, red, raised ridge, parallel with the outer margin, which is smooth and shining. 

 Length, 5 millim. ; width, 3. 



Ofi" Coulman Island, 100 fathoms. 

 The general form of the .shell and the character of the operculum agree with 

 Neohuccinum. It is of thin and delicate texture, and the very fine periostracum is 

 produced upon the threadlike ril)lets at the upper part of the whorls, formino- a 

 sort of fringe below the suture. The riblets are about twenty in number on a whorl. 

 Only a single specimen was obtained. 



Trcschelia ? 

 (PI. I., fig. 8.) 



Ofi' Coulman Island, 100 fathoms. 



A young specimen, 19 millim. in length, is of interest as indicating the presence in 

 the Antarctic region of a large species allied to Troschelia or Sipho, indeed, it bears 

 considerable resemblance to the upper part of the northern Trosch. berniciensis (King). 

 It consists of about seven whorls, which are slightly convex, increase slowly, and, 

 although rather water-worn, the five upper ones exhibit traces of spiral striation. The 

 two last whorls are covered with numerous thread-like spiral lirse, some of which are 

 thicker than others. These are crossed by oblique delicate lines of growth, and a thin 

 straw-coloured periostracum invests the entire shell, excepting the upper worn volutions. 

 Being a young shell, it is impossible to describe the probable form of the aperture or 

 the character of the labrum and anterior canal of the adult. The last whorl is 

 somewhat inflated at the middle, and contracted below into a short twisted recurved 

 beak. The operculum is reddish, horny, and of the ordinary fusoid or unguieulate 

 character, exhibiting distinct lines of growth and a terminal nucleus. A large operculum 



