POLYZOA 



195 



GENUS Eucratea 



E. chelata. A small, delicate species rising from a creeping stem. 

 It has branches composed of single rows of horn-shaped cells having an 

 oblique aperture on the side. Found at extreme low-water mark on 

 hydroids, shells, stones, and Fucus. (Plate XLIX.) 



GENUS Cellularia 



C. ternata. Zoarium filamentous, spreading, about one inch high, 

 white, calcareous, branched in a forking manner ; cells long, narrowest 

 at base, arranged in series of three and on the same plane, apertures 

 oblique and facing one way ; horny joint between each cluster of cells. 

 This species grows in deep water from Cape Cod northward, and is found 

 on objects washed upon the beach. (Plate XLIX.) 



GENUS Caber ea 



C. Ellisii. Zoarium erect, with fibrous base, leaf -like, branches in a 

 forking manner; branches straight, stiff, narrow, spreading; cells ar- 

 ranged in rows of three, adherent throughout ; long bristles emanate 

 from near base of many cells ; egg-capsules globular, smooth, pearly. 

 Common from Cape Cod northward in deep water. (Plate L. ) 



GENUS Sugula 



B. turrita. This is a very abundant species, found everywhere along 

 the coast from Maine to North Carolina. Large quantities of it are 



1, Buyula turrita, enlarged ; 2, the same, a branchlet, highly magnified; 

 3, the same, a branchlet, bearing ovicells. 



