VINE: NOTES ON FOSSIL POLYZOA. 
379 
referred to a new Genus founded by Mr. John Young, I have left it 
out of the above list. The description of Nicholson's M. tumida is 
founded on specimens collected from the neig-hbourhood of Redesdale, 
Northumberland, where "the form is very abundant and well-pre- 
served " in these Carboniferous shales. Along" with the " normal 
type," there is anotheroccasionally met with, and tliis Prof. Nicholson 
has described in the same work as M. tumida, Phill., var. milliaria^ 
Nich., but the author sa^^s "in our ignorance of the complete 
corallum of M. tumida, it is impossible to assert positively that this 
apparently well-marked variety may not be really merely founded 
upon some particular part of the adult skeleton, as for ex&,mple. the 
young actively growing branches."* 
In a later work, "Contributions to Micro-Palgeontology " f 
Prof. Nicholson remarks : — " It is quite clear that Phillips himself 
included at least two different forms under the name Calamopora 
tumida. One (Geo. Yorks., pi. I , figs, 49-51) is almost certainly 
the form which I have here and elsewhere regarded as Monticulipora 
tumida. Another form (op. cit. pi. I,, figs 52, 56, 57) may be 
taken as an equal approach to certainty, to be the type which I have 
called Stenopora Howsii, Nich." This later species, however, Mr. 
John Young, of Glasgow, refers also to his new Genus Tabulipora. 
In the Annals and Mag. Nat. History, 1874, is a short paper 
on " Chcetetes tumidus, PhilL, by R. Etheridge, jun." At page 195 
he says, " This is probably the fossil figured by Ure in his ' History 
of Ruthergien and East Kilbride,' pi XXII., fig. 1, and by Flemiug 
as Cellepora Urii.\ If this be so, Ure was the first to figure 
ChxBtetes tumidus.''^ 
Recently the " Millepore," of Ure, has been taken in hand by 
Mr. John Young, and in a paper on the subject,§ the author says, 
p. 155, "I have discovered what I believe to be an important 
internal character in the structure of the organism which Ure figured 
and described in 1793 as a species of Millepore." and which will, 
* Genus Monticulipora, pp. 123-4. 
^ Ann. Mag, Sat. Hist, Nov. 1883, p. 294. 
X Brit. Animals, 1828, p. 533. 
§ Ann. Mag. Nat. Hist., Sept., 1883, pp. 155, 158. 
