BRITISH ZOOPHYTES. 289 



There is a variety [Foliacea) of this species in which 

 the zoarium extends in a foliaceous manner, resembling 

 that of Betepora. 



3. P. LOREA, Alder. 

 Eschara lorea {Aid., A. M. N.). 

 Hab. : Shetland {Barlee, A. M. N.). 



This is another deep-water species, which grows 

 erect to the height of 1 to 1^ inches. It very much 

 resembles the preceding, with which it has been con- 

 sidered identical, 



4. P. (?) CRiBRARiA, Johnston. 

 Eschara cribraria [G. J., D.L., Alder). 



Eeferred provisionally to this genus, but considered 

 by Dr. Johnstone and others as a form of M.pavonella. 



Genus VIII. Retepora, Tm-perato. {Eete, a net.) 



Zooecia disposed on the front surface of an erect 

 and ramose zoarium, the branches of which usually 

 inosculate, and form a reticulate expansion ; orifice 

 semicircular or semi-elliptical, with a prominent rostrum 

 on the lower margin, bearing an avicularium. Zoarium 

 adherent by means of an incrusting base, composed in 

 great part of aborted cells ; avicularia developed on 

 both the back and front of the zoarium. — T. H. 



In the British species of this genus the zoarium 

 forms reticulated foliaceous expansions. 



1. R. Beaniana, King. Plate XXII. fig. 4. 



Millepora cellulosa {Jameson, Linn., Turt, &c.), M. 

 retepora {Pallas), R. cellulosa forma Beaniana {Smitt), 

 Eschara Beaniana {8mitt), R. dentelle de xner (De Bl), 

 R. reticulata {D. L.). 



Hab. : Northumberland {King, Alder, &c.), Peterhead 



u 



