240 



INOCERAMUS MORESBYENSIS. (Nom. Prov.) 



Fig. 11. Inoceramus Moresby ends. Outline of an imperfect left valve to shew 

 the alation of the hinge line behind the heaks. 



Shell moderately convex in front, especially in the umbonal region, 

 and obliquely compressed behind : posterior dorsal margin abruptly 

 inflected. Height somewhat greater than the length, greatest length 

 just below the winged expansion of the hinge-line above : anterior 

 margin shallowly concave immediately under the beaks and somewhat 

 convex below : ventral margin rounded narrowly in front and obliquely 

 as well as more broadly so behind : posterior margin obliquely convex 

 below, straighter and widening outwards above. Hinge margin appar- 

 ently ascending above, behind the beaks, in such a manner as to form 

 a thin alate prominence or expansion whose exact outline is not known 

 but whose posterior margin seems to have been obliquely truncated or 

 subtruncated : beaks anterior, terminal, curved inwards and forwards. 



Surface marked with numerous, very irregular and rarely continuous 

 subconcentric plications. 



North shore of Cumshewa Inlet, Moresby Island : a few imperfect 

 specimens. 



