44 
VINE : CLASSIFICATION OF THE PALEOZOIC POLYZOA. 
VI. Funicular opening and Endosavcal passages. The opening at 
the bottom of the cell, and the interspaces between cell 
and cell. 
VII. Gonocyst. The inflation of the surface of the Zoarium, in 
which the embryos are developed ( = Ovicell). 
As this paper will be followed by others, wholly devoted to the 
structural characteristics of the Palaeozoic Polyzoa, it may be well to 
refer to remarks in my first paper on Diastoporid.'e,* " It is clear . 
. . that the Palaeozoic representatives of the family Diastoporidae 
differ very materially fi'om the more recent members. If the whole 
are to be classified under one family name, a course highly advan- 
tageous to the study of Polyzoa, it will be necessary to take into 
consideration the more prominent characters, and place the species 
of the different formations under suitable genera," consequently I 
suggested the following arrangement : — 
Recent and Tertiary Genus 1. — Diastopora, Johnston. 
Secondary „ IL — To be re-worked. 
Palaeozoic (in part) III. — Ceramopora, Hall. 
Palaeozoic (in part) ,, IV. — Berenicea, M' Coy's description 
restricted. 
Since then Ceramopora megastome, Vine, has been re-worked by 
Mr. John Young f and Messrs Nicholson & Foord,t and the carboni- 
ferous form is now placed as a synonym of Fhtulipora (Calamopora) 
incrustans, Pliillips. I have no objection to the synonym, for it is in 
good company, and I refer to it now because the re-study of the form 
by these esteemed authors has brought out a most valuable structural 
feature in this species, and in Fistuliimxi generally. " This consists 
of a very peculiar modification of the walls of the autopores which 
give them quite a distinct fades. The autopores possess a strong 
fold which imparts a trilobate or floriform aspect to the ceUs." The 
sinus is minutely described by the authors, and as it has a decided 
morphological significance, 1 refer the student to the closer study of 
the autopores of the Monticuliporidae, taking as his guide the valuable 
paper on the Genus Fistulipora, M'Coy, by Nicholson & Foord. 
* Quart. Jour. Geol. Soc , Vol. XXXVI, 1880, pp. 356-361. 
f Annals and Mag-. Np.t, Hist., Dec. 1882, pp. ■i27-431, and Tiane. Geol. Soc, 
Glasgow, 1883, pp. 244-250. 
% Ann. Mag. Nat. Hist., Ser. V., Vol xvi, p. 500. 
