392 NEW MARINE MOOjLUSCA. 



fourth; in profile it shows a deep trigonal sinus between 

 the suture and the angle, and is then convex; inner lip 

 arched, callously expanding over the columella. 

 Length, 12.5 m.m.; breadth, 5 m.m. 



Locality: Type from 80 fathoms 10 miles east of 

 Schouten Island, with six others. It seems nearest to D. 

 jaffaensis Verco, but is larger, and the sculpture is suf- 

 ficientlv distinct. 



DRILLIA SUBVIRDIS, N.S. (PL. XIV., FIG. 18.) 



Shell subfusiform, solid; colour greenish white; in- 

 terior of aperture dark green; wdiorls 'jy2, including a 

 protoconch of two smooth rounded whorls. The sculp- 

 ture consists of numerous strong, smooth, rounded ribs, 

 which are not separated by any intermediate space, and 

 which spring directly from the suture. There are about 

 15 of these ribs on the penultimate whorl; a deep groove 

 or depression on the upper part of the whorl almost re'- 

 duces the ribs to vanishing point, above which they re- 

 appear with a strong bend towards the left, and give the 

 effect of a row of tubercles at the suture. There is one 

 faint impressed line about the upper third of the body 

 wdiorl, and a number on the base; aperture short and 

 broad, widely open anteriorly, with scarcely any contrac- 

 tion for a canal; outer lip simple, rounded, with a deep 

 notch at the suture ; columella strongly arched ; lip broadly 

 expanded over the body whorl, developing a strong 

 callosity vvdiere it curves round above the sinus; oper- 

 culum ovate, with apical nucleus. 



Length, 16 m.m.; breadth, 6 m.m.; length of aperture, 

 6 m.m., but a cotype is 20 m.m. long. 



Locality: Type from eight to nine fathoms ofl Pilot 

 Station, Derwent Estuary, with others; also two very 

 dead and broken from 40 fathoms three miles east of 

 Schouten Island. 



This fine species is one of the largest members of the 

 family in Tasmania. It is remarkable that it should have 

 escaped detection so long. It is nearly related to D. 

 woodsi Beddome, ])ut is distinguished by the long 

 straight ribs — not nodulous — and which continue to the 

 suture, although bent by the sinus groove and by its 

 stouter form and much larger size. 



