360 VINE: CLASSIFICATIONS OF CYCLOSTOMATOUS POLYZOA. 
collect in a few morning walks in the neighbourhood of Sidney 
Harbour." 
With regard to the "classification of the Cyclostomata, Mr. 
Waters says (p. 337): "I would propose that we should divide the 
Cyclostomata into two sub-divisions, namely — first, the Paral- 
LELATA, or those in which the surface of the Zoarium is, to a 
considerable extent, formed of the lateral walls of the Zooecia ; " 
Types — Crista, Untalophora, Diastojoora and Tuhidipora: "'And 
secondly, the Rectangulata, or those in which the Zooecia or cancelli 
open for the most part at right angles to the axis or surface of the 
Zoai'ium or sub-colony." — Types, Heteropora, Lichenopora, ^-c. 
There are several structural peculiarities of Cyclostomatous 
species pointed out by Mr. Waters in this important paper, especially 
''rays" or ''hair-like teeth" in the Zooecia, and the closure of the 
tubes, as already referred to. In all our future Pala3ontological 
researches it may be well to consider the minutae referred to, and 
others may be present, though overlooked by authors. I have already 
pointed out and described* a very peculiar mode of " closure " in a 
species of Entalopliora from the Xeocomian Clay of Lincolnshire. 
The arrangement of the Zooecia, the punctures of the surface, and the 
closures in the throat of the tubes, are similar to the figured example 
of Entalopliora Wanganuiensis Waters. | Other Mesozoic examples 
may be forthcoming, if a careful study of the Zooecia is made. 
It will be unwise to anticipate the future work of Mr. Waters 
on this Sub-order, but it may be well to direct attention to the 
already tabulated lists of species described, and also the order in 
which the genera are arranged by him. 
I. — Parallelata, Waters. Idmonea. 
Entalophora. 
Cinctipora. 
Hornera. 
Stomatopora. 
Diastopora. 
* Notes on a species of Entalopliora, from the Neocomian Clay of Lincoln- 
Bhire. Ann. Mag., Wat. History, Jan. 1887. 
t Q. J. G. S., Aug. 1887, p. 340, pi. xviii., f. 1. 
