390 THE CANADIAN NATURALIST. [Vol. X. 



head,"), very slighty hooked at the extremity, apparently 

 jointed to an extremely thin pedicle, mandible slender, pointed. 

 Ooecium (?). 



Loc. Houston-Stewart Channel, Queen Charlotte Islands (^Dr. 

 G. M. Dawson). 



Family Cribrilinidw. 

 CRIBRILINA, Gray. 



CRIBRILINA FURCATA, N. SP. 



Zooecia ovate, quincuncial, very regularly disposed, mode- 

 rately convex ; surface smooth and lustrous, often of a reddish- 

 brown color, on each side four to six shallow grooves, radiating 

 to a median line, and a central one below, which are occupied by 

 a row of roundish pores set very closely together, the ridges be- 

 tween them slightly raised, usually bearing several elliptical 

 pores : orifice arched above, straight below, much broader than 

 high, on each side a stout bifid spine (occasionally simple) ; peri- 

 stome much thickened in front and rising into a central mucro. 

 Avicidaria none. Ocecium large (covering about half the cell 

 above it), rounded, taller than broad, depressed in front, with a 

 shallow oral arch ; surface smooth, rather thickly punctured. 



Loc. Off Cumshewa Harbor, Queen Charlotte Islands (Dr. G. 

 M. Daw soil). 



CRIBRILINA HIPPOCREPIS, N. SP. 



Zooecia ovate, quincuncial ; surface lustrous, flattish (sutures 

 very shallow), traversed by radiating ridges (three to five on each 

 side), which pass from the sides to the centre (no median keel), 

 the grooves between them occupied by a line of rather large ob- 

 long pores ; at the margin of each ridge an elliptical foramen, 

 covered in by a delicate membrane : orifice large, well arched 

 above, constricted a little above the lower margin, which is 

 straight ; operculum of a rich reddish brown ; peristome not ele- 

 vated, lower margin much thickened, usually terminating on each 

 side in a knob ; large, elongate, depressed spatulate avicularia 

 scattered amongst the cells. Ooecium (?). 



Surface of zoarium flat; color brown, with a tinge of red, in 

 old states white and highly calcified. 



Loc. Cumshewa Harbor and Houston-Stewart Channel, Queen 

 Charlotte Islands, on shell (D?-. G. M. Dawson). 



