220 EEV. E. BOOG WATSON ON THE 



This resembles the Turritella sinuata, Eeeve ; but in that the 

 apex is much finer, the earlier suture much shallower, and the 

 whorls of much slower increase. It is extremely like some speci- 

 mens in the British Museum, on a tablet numbered " 906. Bass 

 Strait," and on the back of which there is written " 45 fms., coarse 

 sand and dead shells ;" but they are, I think, distinct. In many 

 respects it recalls the well-known Mediterranean and Atlantic 

 species T. triplicata, Broc. ; but it is a smaller and more delicate 

 species than that, and the finer spiral sculpture is very much 

 more delicate and irregular. 



2. TuEEITELIA. ACCISA, n. Sp. 



St. 162. April 2, 1874. Lat. 39° 10' 30" S., long. 146° 37' E. 

 S.E. Australia, off E. Moncceur Island, Bass Strait. 38-40 fms. 

 Sand. 



SJiell — Subulate, a very little contracted at the edge of the 

 flatfish and little conical base, with a strongly fur- 

 rowed suture, on the lip a deep sharp sinus, thin- 

 nish, speckled. Sculpture. The surface is closely 

 covered with very fine sharp scratches on the 

 highly curved lines of growth, which are specially Lab ^ 

 crisp on the base, where they are flexuous and Turritella ac- 

 unbroken. Spirals — there are on the last whor\ oisa, W. 

 two keels, one near(about 0'04 millim. from) the top, 

 the other a little further (about 0'05 millim.) from the bottom 

 of the whorl : both are blunt, roundly swollen bands defined by 

 the sutural contraction, but the upper one is slightly the sharper; 

 the under one is the stronger and better defined, the sutural con- 

 traction below it being more abrupt instead of presenting the 

 mere sloping shoulder which lies between the upper band and 

 the suture. Between these two carinations the slightly im- 

 pressed surface is scored by several threads and furrows, of 

 which sometimes one, sometimes two are stronger than the rest. 

 Similar threads, but with feebler furrows, occupy bhe suprasu- 

 tural contraction, the suture being marginated on its upperside 

 by a small slightly swollen band ; where the suture ceases at 

 the upper corner of the mouth, this band forms the roundly angu- 

 lated edge of the base, strongly defined by the furrow which 

 lies above it. Besides these stronger spirals, the whole surface 

 is irregularly scored with fine spiral threads. Towards the apex 

 the minuter sculpture disappears, the two keels lose their pro- 

 minence, and the whor]s are sharply carinated by one of the 



