360 Transactions. 



Art. XXXV. — Descriptions of New Species of Neiv Zealand 



Mollusca. 



By Henry Suter. 



[Read before the Wellington Philosophical Society, 2nd October, 1907.] 

 Plates XXVIII-XXX. 



1. Tonicia cuneata, n. sp. Plate XXVIII, figs. 1-2. 



Shell oblong-ovate, rather small, valves much raised, the 

 intermediate valves beaked, angled above, with cuneiform 

 sculpture. Anterior valve with 4 low and smooth ridges with 

 serrated margins, corresponding with the slits, anterior margin 

 with the same number of slightly projecting lobes, posterior 

 margin a little concave ; sculpture between the riblets con- 

 sisting of deeply engraved grooves and punctures, leaving nume- 

 rous wedge-shaped patches of various size ; the whole surface 

 dotted with minute eyes. Of the intermediate valves, the. 

 first is notably larger than the following 5, all are sinu- 

 ated on the latero-anterior sides and narrowed, convex in 

 front and prominently beaked behind ; dorsal area V-shaped, 

 smooth, microscopically transversely finely striate ; pleural 

 tracts with a few narrow longitudinal and divergent serrated 

 grooves ; lateral areas not raised, with an anterior obtuse dia- 

 gonal ridge, sculpture similar to that of the head-valve ; the 

 small, reddish eyes sc vttered over the whole surface. Posterior 

 valve with a V-shaped dorsal area, its sides serrated, mucro at 

 about the posterior fourth, posterior slope moderately concave, 

 posterior margin slightly lobed, the lobes corresponding with 

 the slits ; sculpture beautifully wedge-shaped, with the postero- 

 lateral ridges corresponding with the anterior slits ; the whole 

 surface covered with minute eyes. Girdle moderately broad, 

 leathery, yellowish, almost naked, with very few silvery fine 

 hairs near the margin. Colour a dirty-while; anterior valve 

 with the riblets reddish-white, the grooves and punctures rusty ; 

 intermediate valves with the central area light-olive, bordered 

 by white, ornamented with very fine longitudinal reddish lines ; 

 grooves on the pleural and lateral areas rusty, a few light-blue 

 spots scattered over the areas ; posterior valve having the 

 central area coloured as the intermediate valves, the grooves 

 rusty, the cuneiform nodules light-blue on the pleural tracts, 

 white, with a few blue spots, posteriorly. Interior greenish- 



