282 NATURAL HISTOEY OP 



6. S. BELLA^ Buslc. 



Lepralia bella {Bush, McA.), 

 Hab. : Shetland {Barlee). 



Nearly related to 8. clieilostoma. Described by Mr. 

 Bask in the Q. J.M. S., viii. (1860), 144. 



7. S. TKispiNOSA, Johnston. Plate XXI. fig. 8. 

 Discopora trispiuosa {G. J.), Berenicea trispinosa 



{G. J.), Lepi'alia trispinosa [G. J., T. H., Busk, McA., 

 B. q. C, Alder, B. X.), L. Jeffreysii var. a {A. M. N.), 

 Escharella Jacotini (Smitt). 



Hab. : Berwick Bay {G.J.), Northumberland (^ZcZer), 

 Cornwall {C. W. P.), Aberdeen (McGillivray) ,B.Si5tmg3 

 [Miss Jelly), St. Andrews [McL), South Devon, Isle of 

 Man {T. E.). 



This species forms yellowish crusts, which in aged 

 specimens become thick and coarse, and " swell up at 

 pretty regular intervals into little bosses or tubercles. 

 The cells in these parts are irregularly heaped together, 

 and often rise perpendicularly somewhat in the manner 

 of a Gellepora." — Alder. In normal specimens the 

 cells are more or less rectangular, with distinct raised 

 margins. They are roughened with punctures, a row 

 of which is also placed within the margin. There is a 

 peristome with a " spout-like " sinus, and the orifice is 

 armed with three long stout spines. The crusts are 

 often " white in colour, but freckled with yellow." — 

 Gouch. 



Genus VI. Phylactella, Hincks. {(})v\aKT6<i, 

 fortified.) 



Zocecia with a primary orifice more or less semi- 

 circular, the lower margin usually dentate ; peristome 

 much elevated, not produced or channelled in front. 



