284 NATURAL HISTORY OP 



the peristome elevated in frout into a more or less 

 prominent macro. Zoarium (in the British species) 

 incrusting. — T. H. 



1. M. Peachii, Johnston. 



Lepralia Peachii [G. J., Gray, Busk, McA., Seller, 

 D. L., Alder), L. immersa (G. /., I). L., B. Q. C), Bere- 

 nicea flava {G. J.), B. immersa {Flem.), Escharella 

 immersa {Gray), Discoporella coccinea forma Peachii 

 (Smitt), B. immergee {De Bl.). 



Hab. : Cornwall {G. TF. P.), Sana Island {Eyndman), 

 Ayrshire Coast (D. L.), Guernsey {T. H.), &c. Common. 



This species somewhat resembles Microjporella ciliata. 

 It forms irregular incrustations of an amber colour. 

 The zooecia are sometimes plain and at others granu- 

 lated. The orifice is protected by a peristome prolonged 

 into a mucro, and has five or six spines on the upper 

 margin. The cells are immersed, which gives the 

 colony a flat appearance. There is a variety [octoden- 

 tata) in which there are eight marginal spines. The 

 spines are very brittle, and are rarely found in aged 

 specimens. 



2. M. VENTRicosA, Hassall. 



Lepralia ventricosa (Hassall, G. J., BusJt, McA., D.L., 

 Manzoni, Alder), L. arrecta (Benss), Discopora coccinea 

 forma ventricosa {Smitt). 



Hab. : Northumberland {Aid.), Dublin Bay {Hassall), 

 Irvine {D. L.), Newhaven {Dr. Greville), Sana Islands 

 {Hyndman), Cornwall, Guernsey {T. H.). 



This species has large, convex, distinct cells of a 

 greyish-white or brownish colour. The cells are ovato- 

 globose, with longitudinal lines of small dots or 

 punctures extending down each cell from the orifice, 

 which is circular, raised into a peristome, and armed 



