262 NATURAL HISTORY OP 



6. S. LINEARIS, Hassall. 



Lepralia linearis {Hassall, Manzoni, Bush, McA., G.J., 

 D. L., A. M. N.), L. hastata {T. H.), L. tenella (Reuss), 

 Escharella linearis (8mitt), Herentia linearis {Gray). 



Hab. : Very generally distributed. 



The cells are oblong, witb a small orifice surmounted 

 by two or three spines in the centre of the top margin. 

 There is an avicularium on eacli side of the face of the 

 cell, and between these avicularia is a small umbo. 

 The surface of each cell is punctured, and the margins 

 between the cells are very distinct. The cells are very 

 regularly placed side by side, and the colonies are rose- 

 coloured. 



There are several variations in the appearance o£ 

 this zoophyte, caused mainly by differences in the 

 characters of the avicularia. 



7. S. SANGUiNEA, Norman. 



Hemeschara sanguinea {A. M. N.), Escharella 

 sanguinea {8mitt). 



Hab.: Guernsey {A. M. N.), Cornwall {T.E.). A 

 deep-water species. 



This is a very pretty species, the zooecia being ar- 

 ranged in regular rows. They are square with rounded 

 tops and semicircular orifices, the lower margin of each 

 orifice being cut into three notches. The margins are 

 distinct, and each cell is pitted with small depressions 

 arranged in linear rows. Though generally found incrust- 

 ing stones, &c., it occasionally assumes an erect growth. 



8. S. CRISTATA, Hindis. 

 Hab. : Hastings {Miss Jelly). 



This species is described by Mr. Hincks from a 

 single specimen. The cells are rhomboidal. The 

 orifice is surmounted by 5 spines ; the lower margin of 



