EEPORT ON THE GASTEROPODA. 309 



Some of Bellardi's fossil Surculas from Piedmont, such as Plcurotoma (Simula) Lamarcki, or 

 Plcurotoma forastii, or Plcurotoma recticosta with a shorter and broader snout, would resemble thi3 

 more than any. An elongated Plcurotoma crennlaris, Lam., would have some resemblance, but I 

 really do not know with what to compare it. The form of its ribs is slightly suggestive of Plcurotoma 

 consociata, E. A. Sm. 



39. Pleurotoma (Drillia) kymatoessa, 1 n. sp. (PI. XXVI. fig. 5). 



Station 162. April 2, 1874. Lat. 39° 10' 30" S., bug. 146° 37' E. Off East 

 Moncoeur Island, Bass Strait. 38 fathoms. Sand and shells. 



Shell. — Small, strong, narrow, white, wavily-ribbed, spiralled, with a short and small 

 last whorl, a short base, a small snout, a high spire, and a small blunt white apex. Scuty- 

 ture: Longitudinals — there are in the middle of each whorl about 14 feeble little ribs which 

 do not extend to either suture nor to the base ; the last forms a strong varix remote from 

 the outer lip edge and extends from the suture to the canal ; there are, besides, fine hair-like 

 lines of growth. Spirals — above the periphery there are fine rounded threadlets evenly and 

 rather remotely parted ; at the periphery there are about four somewhat stronger than the 

 others, parted by shallow widish furrows, in which there is generally a much smaller thread- 

 let; on the base are 20 to 25 fine round threads, stronger than those at the shoulder aud 

 weaker than those at the periphery ; they are extremely equal and regular till at the very 

 point, where they become weak and unequal. Colour greyish porcellanous white, with a 

 faint stain of ruddy brown both at the top and at the point of the mouth on both lips, and a 

 very faint trace of the same on the base. Spire high, narrow, conical, subscalar. Apex 

 blunt, rounded, but small, consisting of 1\ quite smooth convex whorls, of which the small 

 extreme tip is a little flattened down on one side. Whorls 9 in all; they are subangulated 

 above the middle, short, the last is small, subtumid above with a short rounded base, 

 narrowing rapidly to a stumpy, twisted, slightly reverted, and very emarginate snout. 

 Suture barely recognisable, except for the contraction of the whorls rounding into it above 

 and below. Mouth narrowly pear-shaped, with a short, narrow, bent canal in front. Outer 

 lip rather strong, with a narrow undulated edge ; it has a deep, narrow, rounded, marginated 

 sinus above, separated from the suture by a long, strong, narrow tongue or shelf; the 

 margin of the sinus is prolonged obliquely downwards in a strong, narrow, remote, white 

 varix, in front of which the lip projects in a long prominent sweep. Inner lip thickened and 

 tubercled above ; it is thin and short on the body, where it is flat ; it joins the pillar at an 

 obtuse angle and then runs very direct down the oblique pillar, which has no twist but a 

 sharp straight edge, and a sharp but strong point ; behind the edge there is a very minute 

 shallow furrow. H. 0"98 in. B. 0"19. Penultimate whorl, height 0-08. Mouth, height 

 0-19, breadth 0-09. 



1 xv/iarottc, wavy. 



