97 



umbilicus broad, deep, and finely crenulated by the endings 

 of the lauielliu, aperture round, with a thin varix. Diani., 

 3 mill. 



This form which, though decidedly similar to many Aus- 

 tralian forms, is distinct from any yet described. Quite recently 

 I have seen in the collection of Mr. W. F. Petterd, a specimen 

 dredged from the Tasmanian coast, so that the species is still 

 living. 



Margarita kekwickii. n.s. Shell small, thin, broadly 

 globosely conical, deeply umbilicate ; spirally lirate and shin- 

 ing ; whorls seven, rapidly decreasing in size, rounded and 

 equally spirally lirate with alternating large and small fine 

 lirse, the larger ones sharp, and the lowest projecting a little, 

 forming a groove over the suture, the smaller microscopic, and 

 not visible above the basal and penultimate whorl ; aperture 

 round, peristome almost meeting on base, outer lip thin ; 

 columella curved and thin, umbilicus acutely margined and 

 with curved ribs at right angles to spiral lirae. Long, and 

 lat. 5. Named after my late friend the overseer of Stuart, 

 the great explorer, who accompanied him on all his expedi- 

 tious, and was one of the most courageous and indefatigable 

 of his followers. The fossil has no known living congener 

 in Tasmania. 



Trochus josephi. n. s. Shell very small, broadly pyram- 

 idal with a small, smooth, white, rounded apex of H whirls ; 

 spire conspicuously latticed ; whorls 6-7, with three conspicu- 

 ously keels, the lowest projecting much over the suture ; keels 

 closely latticed regularly by somewhat broader sub-distant 

 sloping ribs which seem to pass under the keels, and to cause 

 them to become nodular as the point of intersection, in addi- 

 tion the whole shell is very finely striate ; base flat, with 

 numerous spiral alternating lirse; aperture subquadrate, simple, 

 entire. Long. 3, width of base, 2. 



Thalotia alternata. n, s. Shell turbinately conical, 

 spire elevated, acute ; whorls six, very slightly convex, granu- 

 losely ribbed; on the last whorl the spiral ribs are twelve in 

 number, three conspicuous and largely granulose, and the rest 

 with small sometimes sharp edged grains or reduced to fine 

 lines ; they are disposed thus — each granulose rib has fine lirse 

 at each side of it, and the large and small ribs alternate ; 

 suture inconspicuous, base convex, rounded at the periphery, 

 with spiral granulose ribs and fine lirae regularly alternating ; 

 aperture obliquely quadrate, nacreous, outer lip thin, smooth 

 inside ; columella s ightly twisted with an obsolete tubercle 

 at the base. Lon. 12, lat. 10. 



Not like any of our existina: Thaiotias. 



S0LA.EIXJM (Tokinia) aiBBULOiDEs. n. s. Shell thick, sub- 



H 



