i:i ii BA, 227 



Tills Spceie> exrrrdin-ly iVM-mhlcs t lie V"ll JILT "I" I 't rirn/n.< f>iiii</i- 



A';itson, luit is very much broader in proportion toils length. 

 i'.. A. Smith is much larger and slimmer II 



i;. i t MICRA Crosse. PI. 23, figs. 43, 1 1. 



Shell imperforate, small, thin, Bubeylindrieal, >hining, smooth, 

 BUbpellucid, white ; spire nearly flat, the apex strongly project i n i: : 



whorls :;.]. the last large, nearly as loin: as the whole shell ; aper- 

 ture narrow, enlarged toward the base. Alt. 4', diam. '2 mill. (C. 



A /'.). 



Xj>'-ncers Gulf, S f . Austm/iu. 



l'i cionicra CROSSE, Journ. de Conchyl. 1865, p. 40, pi. 2, f. 7. 

 etimicrus ANG., P. Z. S. 1865, p. 188. 



R. APICULATA Tate. PI. 23, fig. 45. 



Similar to U. eumicrus Crosse, but distinguishable by its sunken 

 spire, the papillary apex of which is exserted beyond the level of 

 the body whorl. The anterior extremity of the shell is more gradu- 

 ally tapering, and the shoulder of the body whorl is less abruptly 

 arched, consequently U. apiculaius is more fusiform than its ally. 

 It is also much larger. 



King George's Sound, S. W. Austrnlin. 



Utrieulus apwulatus TATE, Trans, and Proc. and Rep. Philos. 

 Soc. of Adelaide, for 1878-9, p. 138, pi. 5, f. 3. 



R. ORYCTUS Watson. PI. 21, fig. 5. 



Shell subcylindrically oblong, tumid below the middle and 

 rounded in front, obsoletely striate in the lines of growth, truncate 

 above, when the crown is sharply angulately edged and excavated 

 with a papillary apex. Sculpture: Longitudinals the ordinary 

 ridges and furrows in the lines of growth are feeble, except on the 

 crown, where the old lip edge scars are strongish, close and hair- 

 like. Spirals none, except that round the edge of the crown there 

 runs a sharp angulation in continuation of the outer lip. Color 

 ivory-white, somewhat streaked longitudinally. Mouth a little 

 longer than the body, and at the top, to a small extent, enlarged, 

 slightly curved on the inner side, and there in front gibbous; on 

 the outer side It is nearly straight. Whorls 3 ; the last encircles 

 all the rest, which only appear on the crown, where each rises above 

 its predecessor in a round-faced curve; the first is papillary and 

 immersed, the last rises above on the margin in a sharp edge and is 



