INTRODUCTION. 
xxxiii 
Cyclostomata, which they divided among nine families. Their 
arrangement is interesting for the considerable increase in the 
number of families. Although they included Escharites and 
Sparsicavea in the Entalophoridae they failed to accept the 
Homeridae. 
Stomatoporidfe 
Diastoporidae 
Entalophoridae 
Tdmoneidae ... 
Tubigeridae ... 
Fa^ciporidae 
Fa.sciculiporidae 
Heteroporidae 
Lichenoporidae 
Stomatopora. 
Diastopora. 
£ntalopho)'a , JSidiastopoy'a, £schay'ifes, Spiropora, 
and Sparsicavea. 
Idmonea, Eeptotubigera, Hornera, and Filisparsa. 
Bisidmonea and Tuberculipora. 
Fungella and Supercgtis. 
Cyrtopora and Truncatula. 
lleteropora (= lieptomulticava). 
Radiopora ( = Bicavea) and Lichenopora (syn. Actino- 
pora and Bomopora). 
The year 1887 was also marked by Mr. Waters’ one constructive 
suggestion towards the classification of the Cyclostomata. ^ In an 
account of the Cainozoic Cyclostomata from Hew Zealand he 
proposed to divide the Cyclostomata “into two subdivisions, 
namely, first the Parallelata, or those in which the surface of the 
zoarium is to a considerable extent formed of the lateral walls of 
the zooecia, of which Crisia, Entalopliora^ Diastopora, and Tuhulipora 
may be taken as types ; 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 zoarium or sub-colony, of which 
Heteropora, Lichenopora, etc., may be taken as typical.” This 
proposal followed the lead by Hamm, whose Cerioporina, with its 
zooecia “ more or less rectangular to the upper surface,” fore- 
shadowed the Rectangulata, while Hamm’s Tubuliporina necessarily 
all have the sides of the zooecia widely exposed. 
The proposal by Waters to found the primary division of the 
Cyclostomata on the characters of the zoarium is significant, as he 
has generally attached little systematic value to the zoarium. In 
' A. W. Waters. Quart. Journ. Geol. Soc. 1887, vol. xliii. p. 337. Mr. Waters 
has written many papers on the Cyclostomata, but does not group the genera into 
families ; the same course was adopted by Mr. Louis Calvet in describing the fifty- 
three species of Cyclostomata collected by the “ Travailleur ” and “ Talisman.” 
Exped. Sci. du “ Travailleur” et du “ Talisman,” Annees 1880-3, Annelides, 
etc., pp. 356-495, pis. xxvi-xxx. 
