388 THE CANADIAN NATURALIST. [Vol. X. 



POLYZOA OF THE QUEEN CHARLOTTE ISLANDS. 

 PRELIMINARY NOTICE OF NEW SPECIES. 



By the Rev. Thomas Hincks, B.A., F.R.S. 



In this paper I propose to give a diagnosis of a number of 

 Polyzoa from the Queen Charlotte Islands, entrusted to me by 

 Dr. G. M. Dawson, on behalf of the Geological Survey of 

 Canada. 



These forms will be more fully described and figured in a 

 special report on the Polyzoa of these islands, which I hope to 

 publish hereafter. As the preparation of the plates may occupy 

 some time, it seems better to record the new species at once, and 

 so avoid the risk of being anticipated after much labor has been 

 expended on the work. 



All critical notes on the species will be reserved for the 

 Report. 



Family Membraniporidce. 



Membbanipora, De Blainville. 



MEMBRANIPORA NIGRANS, N. SP. 



Zocecia ovate (variable, sometimes arched above and narrow- 

 ing downwards, sometimes broad-ovate, sometimes oval), irregu- 

 larly disposed, margins much elevated, crenate, the whole front 

 of the cell covered by a rather coarse stout membrane of a black 

 color; oral valve large ; on each side at the top a pointed avicu- 

 larium, placed on the margin, depressed at the base, the beak 

 sloping upwards, mandible directed obliquely downwards ; very 

 large avicularia, slightly raised in front, with a broad triangular 

 mandible, which is bent abruptly in the middle, scattered 

 amongst the zooecia. Ooeciwn very shallow, just covering the 

 extremity of the cell, smooth, with a raised rib across it a little 

 above the oral mar2:in, 



Zoariiim of a deep black color, formiog a large irregularly 

 spreading crust. 



Loc, Houston-Stewart Channel, Queen Charlotte Islands (Z)r. 

 6r. M. Dawson). 



membranipora exilis, n. sp. 



Zocecia oblong, quincuncial, subtruncate above and below, set 

 closely together, of considerable size and delicate material, mar- 

 gin thin, a good deal raised, the front wall wholly membranous; 

 at the top of the cell 2 spines, and 3 or 4 on each side (or some- 



