125 



GoNiGORiA CLAVATA. (Radiata, PL III. fig. 1.) 



Coral clavate, rounded at the end, simple, or rarely forked. 



Hab. ? 



The coral is almost two inches high, and the thickest part is about 

 one-third of an inch in diameter. 



I take this opportunity of presenting a figure of another Coral, 

 which, although described by me several years since, has not yet been 

 engraved. 



NiDALiA occiDENTALis, Gray, Proc. Zool. Soc. 1835, p. 60. (Ra- 

 diata, PI. III. fig. 2.) 

 Hab. West Indies, Montserrat. 



3. Description of a new genus of Bivalve Shells, and a 



Sea Egg, from New Zealand. 



By J. E. Gray, Esa., F.R.S., P.B.S. etc. 



Mr. Richard Taylor, of Wanganui, New Zealand, has kindly sent 

 to the British Museum a series of marine and freshwater shells, col- 

 lected by him in 1847. Among many other interesting specimens is 

 one which combines the form and internal appearance of a Solen with 

 the hinge-characters of a Mactra, and evidently forming the type of a 

 genus not hitherto observed. It may be thus named and character- 

 ized: — 



Vanganella. 



Shell equivalve, oblong, transverse, thin, compressed, rounded be- 

 hind, rather produced and tapering in front, covered with a thin, 

 hard, polished periostraca ; the inner surface of each valve straight, 

 with two diverging, thickened ribs just within the stars of the ab- 

 ductor muscles, which are large and far apart, and the upper front 

 edge of the valve double ; siphoual inflection short, broad ; hmge- 

 tooth of left valve folded together, moderate ; of right valve small, 

 separate ; lateral teeth short, small, close to hinge-tooth of left valve 

 double ; the ligament small, just within the cardinal edge, not sepa- 

 rated by any shell plate from the cartilage, and partly hidden from 

 view by the upper edge of the hinge-margin ; the cartilage very large, 

 inclosed in a large, elongate, shallow, triangular pit on the upper part 

 of the hinder internal rib. 



The position of the cartilage-pit and the internal ribs at once sepa- 

 rate this genus from Spisula. 



Vanganella Taylorii. 



Shell rather compressed, white, smooth, covered with a pale brown- 

 ish-white poMsh ; periostraca darker coloured on the upper part of 

 the front edge ; the upper hinder slope irregularly wrinkled with 

 periostraca. 



Hab. New Zealand. 



