BRITISH ZOOPHYTES. 285 



with four long spines on the upper margin, and a pro- 

 minent mucro on the lower one. The cells are distinct 

 from each other, and have a row of punctures on the 

 margin. 



The mucro is sometimes cleft in two, and the cells 

 are arranged in linear series. 



3. M. VARIOLOSA, Johnston. Plate XXII. fig. 2. 



Lepralia variolosa {Q. J., B. Q. C, Basic, McA., D. L.), 

 L. ovalis (Hassall, D. L.), L. serrulata (Beuss), L.tenera 

 {Beuss), L. vinca {B. Q. C), Escharella variolosa 

 (Gh-ay). 



Hab. : Universally distributed. 



The colonies are of a yellowish flesh colour when 

 living, changing on death to brown or sallow white, 

 and sometimes to pure white. The zooecia vary con- 

 siderably in appearance. They are ovate or rhomboidal 

 in shape, with a distinct row of punctures or short 

 transverse bars round the margins, which are slightly 

 raised. The surface of each cell is also dotted with 

 small punctures. The orifice is circular, with the 

 peristome extended into a mucro, behind which is a 

 denticle. There are two or three spines on the upper 

 margin of the orifice. The ovicels are globose and 

 granulated. 



This is a deep-water species. 



4. M. LAQUEATA, Norman. 



Lepralia laqueata {A. M. JV.), Discopora coccinea 

 forma ovalis (Smitt). 



Hab. : Shetland (A. M. N.). 



This is a deep-water species closely allied to the 

 preceding. It is "reddish when living, and ivory- 

 white when dead.'' 



5. M. ABYSSicoLA, Normau. 



