1G2 
vine: >;otes on bkitlsh eocene POLYZOA. 
of the species that one iiatarally hesitates increasing the nomen- 
clature of the species. The arrangement of the ribs at the base of 
the cell is sufficiently distinctive of the variety. 
7. MiCROPORELLA viOLACEA, Jolmst. Var. (ci), FissA, Waters. 
1880. Microporella lissa, Hincks. Contrib. Gen. Hist. Mar. Poly. 
Ann. Mag. Nat. Hist. Ser. 5, vol. vi., p. 381, pi. xvii., f. 4. 
1881. Microporella violacea var. fissa, Waters. Quar. Jour. Geol. 
Soc, vol. xxxvii., p. 329, pi. xv., fig. 26, pi. xvii., f. 73. 
Mr. Waters describes in his " Fossil Chilostoniatous" Boyozoa from 
S. W. Victoria, Australia, a peculiar variety of the widely distributed 
M. violacea. The Zoarium is Eschara-form, flat and depressed. 
Zo(jecia pp'iform or oval, nuicli raised, surrounded by a row of pores, 
or in old and worn cells covered with pores. The peculiar character 
of the Zooecia of M. violacea mil be seen if the student will refer to 
Brit Mar. Polyzoa, vol. ii., pi. xxx., figs. 1 and 2, and in M. jjlagio- 
pora. var. b, the Crag form of M. violacea in the same plate. Inter- 
callery cells, much smaller than the regular Zooecia, are shown in fig. 4. 
The London Clay variety of M. violctcea seem to combine all 
the variations pointed out by Mr. Hincks and Mr. Waters in their 
description of Lepralia plagiopom, Busk, and M. violacea, var. fissa, 
Waters. 
Var. h. There is still another variety of this species in my 
collection, but I have not sufficient material at my disposal to venture 
on a wider separation. This is Eschara-form like the Jissa variety, 
but the Zooecia are smaller and the slit beneath the small pore, either 
entirely absent or less pronounced, the front of the cell behig almost 
or entirely punctate. 
Horizon and Locality : Bracklesham beds, Isle Wight. 
8. EscHARA ? Brongniartii, M. Ed. 
1836. Eschara Brongniarti, M. YA. Ann. des Sc. Nat. 2nd series, 
Ivi., pi. xi., figs. 9-9^. 
1838. „ ,, M. Ed. Rech. sur les Polypes, and sur 
Eschares fossiles ; Paris basin. 
1850. „ „ ? Lonsdale. Geol. Sus., Tab. 1, figs. 9-9c 
Zodriuin foliaceous. Zooecia symetrically placed in the opposite 
layers, not overlayed at either extremity, pear shaped, bounded by a 
