456 MOLLUSCA FROM THE HOPE ISLANDS, N. QUEENSLAND, 



Head Island was catalogued (These Proceedings, xxxii. p. 484) as 

 Clathurella edychroa Hervier,"^ not otherwise known from Aus- 

 tralia. With a larger series, it is now apparent that the Aus- 

 tralian shell consistently differs from the Lifuan, by a whorl less, 

 smaller size, and by coarser sculpture. Other members of this 

 peculiar group are M. cancellata Beddome, J/, telescopicdis and 

 M. jjentagonalis Verco, aud M. latarla Hedley. A more distant 

 relation is M. hilum Hedley. 



Mangelia calcata, n.sp. 

 (Plate xliv., fig.90.) 



Shell small, solid, ovate, turreted. Colour uniform grey. 

 Whorls, four remaining [apex missing in the only example seen]. 

 Sculpture : oblique, wave-like, radial folds, five to a whorl, 

 expanded and projecting prominently at the summit of each 

 whorl. The whole surface overrun by fine, close-packed, spiral 

 threads. Aperture linear, sulcus an almost closed tube at the 

 top of a bold varix, outer lip insinuate near the base, canal very 

 short. Length 3-6; breadth 1-5 mm, 



A single example, from 5-10 fathoms, Hope Island. This is a 

 notable shell; the broad flanges suggest the idea of being trodden 

 under foot; the subtubular posterior notch and the closely corded 

 sculpture are both peculiar. 



Mangelia gracilenta Reeve. 

 (Plate xliv., fig.91.) 



Pleurotoma gracilenta Reeve, Conch. Icon. i. Pl.xiv., f.ll4; P. 

 contracta Reeve, op. cit. f. 11 6,(1843); P.fusoides Reeve, op. cit. 

 PLxxxviii., f.349,(1846); Jide E. A. Smith, Zool. Coll. Alert, 1884, 

 p.39. 



This species has not been cited from Queensland, but I had 

 already recognised it, from 15 fathoms, off the Palm Islands, 

 from Mapoon, from off the Horsey River, and from 5 fathoms, 



* Hervier, Journ. de Conch, xliv. 1897, p.l46; xlv. 1897, p. 109, Pl.iii., f.2. 



