CEISIA. 
3 
which are yery different from the straight narrow branches of Crisitia 
unipora} This instance illustrates the inconyenience of uniting 
in the same species Australian Miocene and European Cretaceous 
Bryozoa, in spite of marked differences between them. Among 
other disadyantages this system has led to the impression that the 
Australian Cainozoic deposits are on a lower horizon than they 
appear to be. 
The absorption of the genus Crisidia in Crisia leayes that genus 
as the only member of its family. The family is usually separated 
as an independent section of the Cyclostomata, on account of its 
articulated zoarium ; apart from this character the zooecia are 
yery similar to those of the simplest forms of Crisina^ such as 
Crisina unipora. That species (see e.g. the figures in Yol. I. 
PI. YIII. Figs. 5, 6) unquestionably resembles some species of 
Crisia \ but the fact that the specimens of Crisina unipora are 
often long and show no signs of articulation, combined with the 
occasional biserial apertures, precludes their inclusion in Crisia. 
The difference is, howeyer, not yery great between Crisina unipora 
and such species as the fossil Crisia scalaris, Macgilliyray,'^ from 
Corio Bay, Victoria, in which the internodes are long and may 
haye as many as twenty zooecia. 
UXIIEPBESEXTED SPECIES. 
1. berardi, Pergens, 1892. 
Sy.v. Crisia berardi, Pergens, 1892. Xouv. Cycl. Cret. : Bull. Soc. beige 
Geol. vol. iv., Mem. j). 278, pi. xi. fig. 5. 
Char. — Zoarium articulate ; each internode consists of two zooecia. Each 
segment is from 1 to 1*2 mm. long; the maximum diameter of the zooecia is 
*3 to *35 mm., and the diameter of the apertures is -2 to '22 mm. in diameter. 
'Walls punctate. 
Distrib. — Cenomanian: Plauen, Saxony. 
Aff. — M. Pergens has described some smaller fragments of simple tubular zooecia 
from the Cenomanian of Plauen in Saxony as members of this genus. The 
material is scanty, and only small fragments are known, and this fact is 
regarded by M. Pergens as proof of the articulate structure of the zoarium. 
The figures given by M. Pergens are quite consistent with the reference of 
this species to Crisia, though they might be young specimens of Filisparsa. 
^ Cf. e.g. the figure by Waters, op. ext. pi. xxx. fig. 1, with those in Cat. 
Cret. Bry. vol. i. pi. viii. figs. 5, 6. 
- Macgillivray. Mon. Tert. Polyz. Yict. : Trans. Boy. Soc. Yict. vol. iv. 
(1895), p. 119, pi. xvi. fig. 1. 
