XXX ' DESCRIPTIVE REMARKS. 
Fig. 8.—Retepora Beaniana, or net-work coral, a recent Polyzoan. 
Hab. Deep Water, British Seas. 
a. Natural size. 
5. Portion of the surface enlarged, showing celluliferous spaces and openings. 
c. A few of the cells highly magnified ; showing the openings. 
Other forms flattened and sometimes branched, are more generally 
distributed in Lower Silurian strata, such as Ptilodictya acuta on the 
ig. 9.—Flustra carbasea, or “ Sea Mat,” a recent Polyzoan. 
Hab. on Shells from Deep Water, British Seas. 
SSS 
ISS 
aS 
SS 
ES 
= 
SEs 
a. Natural size. 
6. Cells enlarged. 
same Plate, fig. 2; this species may be compared with the recent 
Flustra carbasea (woodcut, fig. 9); from Johnston’s British Zoophytes, 
