TORNATINA-RETUSA. 203 



curve of the body is convex, and so passes on regularly to the point 

 of the pillar, which is very oblique and carries a strong, twisted, 

 oblique, longitudinally furrowed tooth ; between this tooth and the 

 body is a very small furrow. Alt. 022 in. diam. 0*1. Mouth, 

 breadth at same place, 0'02. ( Wats.). 



Port Jackson, Sydney, N. 8. Wales, 2-10 fms. 



Utriculus (Tornatina') avenariits WATS., J. L. S. L. xvii, p. 328 ; 

 Chall. Rep. Gastr. p. 658, pi. 49, f. 5. 



Compare T. apicina Gould, and T. brenchleyi Angas. 



This species a good deal resembles, not the Bulla turrita Moll., 

 but Sowerby's figure of that species in Thesaurus, pt. 2, pi. cxxi, 

 fig. 28. In perfectly fresh specimens the spiral furrows, which I 

 have described as very faint, may be distinct; but in the ten Chal- 

 lenger specimens they are only traceable with certainty near the 

 edge of the labial pad. Utriculus canaliculatus (Say), is a much 

 smaller and stumpier form, much broader above with a minute apex 

 turned over on its side. ( Wats). 



T. HOFMANI Angas. PL 22, figs. 37, 38. 



Shell cylindrical, white very finely striated by the lines of growth, 

 with a few distant irregular transverse striae discernible toward the 

 lip on the body- whorl; whorls 5*, the upper ones slightly convex, 

 and channelled at the sutures, the last a little shouldered above and 

 very slightly concave in the middle ; apex sharp ; aperture narrow 

 above, dilated below, and rounded at the base; outer lip thin, 

 arched when viewed laterally, and slightly contracted in the middle ; 

 columella somewhat thickened below, with a small blunt flexuous 

 projection near the base, and covered by a callus extending nearly 

 to the top of the whorl. Length 3 lines, breadth H lines. ( Ang). 

 Sow and Pigs reef, Port Jackson (Brazier)'. 



T. hofmani ANG., P. Z. S. 1877, p. 39, 189, pi. 5, f. 19. 

 Evidently not a typical Tornatina. 



Genus RETUSA Brown, 1827. 



Retusa BROWN, 111. Conch. Gr.Brit., Edit. 1, 1827 ; Conch. Text- 

 book (edit. 4), p. 97. BUQ. DAUTZ. & DOLLF., Moll. Rouss., p. 527, 

 Coleophysis FISCHER, Manuel de Conch., p. 555, 1883, type trun- 

 catulus Brug. Utriculus BROWN (in part), 111. Conch. Gt. Brit., 

 1844 (2 edit), p. 58. Not Utriculus Schumacher, 1817 (Conidce). 



