BY C. HEDLEY. 439 



Obtortio vulnehata, n.sp. 

 (Plate xL, fig.52.) 



Shell elongate-conical. Colour dull white, a purple dash on 

 the columella, apex tinged with brown. Whorls nine, inflated at 

 the periphery, contracted at the suture. Sculpture : a varix 

 frequently occurs on the back of the last whorl, and another on 

 the penultimate whorl. Radials perpendicular, about fifteen, 

 prominent at the periphery, declining towards the suture, on the 

 final whorl tending to disappear. Spirals about eight cords on the 

 last whorl, parted by broad and shallow interstices, on the earlier 

 whorls about five, of which two or three on the periphery are 

 most prominent. Two apical whorls smooth. Aperture oval, 

 subchannelled anteriorly, outer lip simple, columellar lip thickened 

 and reflected. Length 4; breadth l'25mm. 



Abundant, in 5-10 fathoms, off the Hope Islands. This is a 

 larger, more solid, and more coarsely sculptured shell than 0. 

 fulva Watson. The stain on the columella seems a useful 

 recognition-mark. 



On further examination I find that the protoconch of this 

 genus is not heterostrophe, as I supposed at first. I would, there- 

 fore, withdraw it from the Fyramidellidce^ and transfer it to the 

 Rissoidce. Bittium dij^lax Watson,* appears to be another member 

 of the genus. 



The descriptions and figures of Fenella suggest to me that this 

 genus of A. Adams might embrace the species I include in 

 Obtortio, but I have rejected that genus because Watson and 

 Melvill, who had the advantage of examining actual specimens, 

 did not employ it. 



Cerithium nodulosum Bruguiere. 



Cerithiitm nodulosum Bruguiere, Ency. Meth., Vers, ii. 1792, 

 p.478; id., Brazier, Proc. Linn. Soc. N. S. Wales, i. 1877, p.313; 

 id., Dall, Proc. Philad. Acad. Nat. Sci. 1907, p.3G6. Cerithium 



" Watson, Chal). Rep, Zool. xv. 1886, r.55G, pl.xxxviii., f.4. 



