BY C. HEDLET. 743 



spaces, discontinuous from whorl to whorl, increasing in thick- 

 ness as the shell grows, produced to the base, amounting to six- 

 teen on the penultimate; the last five gradually vanish from the 

 base upwards and onwards, leaving a smooth space behind the 

 aperture. Beneath the suture, along all the sculptured whorls, 

 winds a cord less prominent than the ribs, uniting and over- 

 riding them. On the anterior extremity are seven small, but 

 sharp, spiral threads, ceasing where the ribs commence. Aper- 

 ture vertical, narrow, posteriorly channelled, outer lip slightly 

 thickened and everted; within, three small denticles decreasing 

 anteriorly, inner lip with a raised margin plicated by the anterior 

 spirals. Canal short, broad, and slightly recurved. Length, 4*5; 

 breadth, 2-1 mm. 



Hah, — Abundant in Port Jackson, under sticks and stones in 

 the zone of the Avicennia mangrove. Compared with its nearest 

 ally, Z. regulus, this is a stouter shell, with more widely spaced 

 ribs. Except that the Sydney shell has the ribs a little further 

 apart and knobbed on the summit, it is like Reeve's figure of C. 

 atomella (as, but not of Duclos).* 



Zafra almiranta, sp.nov. 

 (Plate Ixxxv., fig.92.) 



Columhella lentiginosa Brazier, Proc. Linn. Soc. N. S. Wales, 

 i., 1876(1877), p.228, (not of Hinds). 



Shell small, solid, conical. Colour buff with a peripheral and 

 basal row of ferruginous dashes. Whorls six. Sculpture : the 

 first two whorls smooth, remainder radially ribbed. Ribs pro- 

 minent, widely spaced, fifteen on the last whorl, their tops cut 

 off" as a bead-row by a subsutural furrow. The base has six, 

 crowded, spiral cords, of which the smaller inner ones are nodu- 

 lose at the passage of the ribs. Aperture narrow, several denti- 

 cles within the outer lip. Length, 3*5; breadth, 1-6 mm. 



Hab. — Abundant in 10-30 fathoms, off Darnley Island, Torres 

 Straits (J. Brazier). Named in memory of the ship of Torres, 

 the first European vessel to traverse this Strait. 



* Reeve, Conch. Icon., xi., 1858, PI. xx., fig.108. 



