406 LIST OF LABRADOR MARINE ANIMALS. 



POLTZOA. 



Tab ulipor a patina Johnst. Common. 



T. hispida Johnst. Frequent on sertularians in 50 feet. 



T. flabellaris Johnst ? 



Diastopora verrucaria M. Edw. (Millepora verrucaria O. Fabr.) 

 Frequent in 50 feet. I have species from Greenland from which it 

 does not differ, also from the Bay of Fundy, 



Stonapora expansa n. sp. Creeping,flat, expanding; the branches 

 widening at the origin of new ones, rugose. Cells in the young 

 long, slender, erect, slightly recurved ; arising singly, or in groups 

 of two or three at irregular intervals along the branch. Old speci- 

 mens broader, cells horizontal, apertures hardly raised above the 

 surface, emarginated. 



A small slender white species, the erect tubes in the young 

 longer than the width of the branch. It differs from the 

 European A. major in being broader and more expanded.* 



Idmonea pruinosa Stm. Frequent from the Bank. 



Hippothoa rugosa Stm. Abundant. All the polyzoa here 

 enumerated are, unless otherwise stated, from the Bank, in 50 feet 

 hard stony bottom, occurring on stones, shells, &c. 



H. borealis D'Orb. (H. divaricata Lamx. ?) Abundant. 



H. expansa Dawson. Frequent. I have also dredged it at 

 Mt. Desert, Me., in 15 feet. 



Lepralia annulata O. Fabr. A group of three cells, with two 

 spines on each side of the distal margin, occurred. 



L. crassispina Stm. which I take to be the representative of 

 the European L. Peachii, and which assumes its forms, was one of 

 the most abundant species. 



L. trispinosa Johnst., or an allied species was very abun- 

 dant. It is also abundant in Maine, as far south as Portland. 



L. pertusa Thomps. I cannot distinguish my specimens by any 

 permanent characters from the British species occurring on a stone 

 with Crania anomala. It is oval or broad oval, somewhat flattened 

 or convex, punctured somewhat coarsely, with ridges separating 

 the cells, which are arranged in no special order. Aperture round, 



* S. compressa n. sp. I have another narrow compressed, very convex 

 species from Greenland. It is adherent, creeping, much rounded above. 

 Cells in a single alternating row, being short and thick, and opening a 

 little outwards ; at the end of the branch much thickened and enlarged, 

 giving rise to three or four cells. It varies in the size and relative 

 distances of the cells. William Coll. Exp. 



