BRITISH ZOOPHYTES. 215 



FAMILY II. EUCRATID^. 



Zoop-cia uniserial or in two series placed hack to hack, 

 expanding from the hase upwards with a terminal or 

 subterminal and tisuallij ohlique aperture. Zoaria 

 forming slender branching phytoid tufts. — T. H. 



Genus I. Eucratea, Lamouroux. 

 From Eucrate, one of the Nereids. 



Zoariwm composed of a creeping base and erect 

 branching shoots. Zooecia subcalcareous, uniserial. 

 Aperture large, oblique, lateral or sublateral, the oral 

 opening at the top of it. Ooecia terminal. Tentacular 

 sheath terminating in a ring of seta3. — T. H. 



1. E. CHELA TA, Linji. Plate XVII. fig, 2. 



? Hippothoa cassiterides {R. Q. C, B. L., G. J.), 

 Crisia chelata {G. J., R. Q. G.), Sertularia chelata 

 {Linn.), Cellularia chelata (Pall.), Sertularia loricata 

 {Linn., Turt..,8tew.), Cellaria chelata {E. and 8., Lamk.), 

 Scruparia chelata {Oken, Busk, P. H. G., McA.), E. 

 loricata {Flem.), Unicellaire cornet {De B.), Eucratee 

 cornee {M. Edw.), Catenaria chelata {D'Orh.). 



Hab. : Widely distributed. 



In this species the zooecia are white, shining, and 

 perfectly transparent. They are shaped like a bull's 

 horn, hence the name " Bull's-Horn Coralline,'^ given 

 by Ellis (" Corallines," 42). A "powder-horn would 

 be a better comparison" (Gosse), or a shoe (Couch), 

 or slipper (Landsborough). 



Mr. Gosse's description of this species is very com- 

 plete and interesting (D. C, 132). " The outline of 

 the cell is nearly half a crescent. The aperture is large, 

 oval, oblique, and surrounded by a high rim. This is 



