VINE : NOTES ON POLYZOA FROM THE CORNBRASH OF THRAPSTON. 251 
character of Stomatopora P/iillipsii. Forms of both fossil and recent 
polyzoa, in some respects similar to the present one, have been placed 
in the Genus Terebripora d Orb, or Hippothoa Lainx., indeed, Philips 
suggests that his species may be a member of the Hippothoa group, 
and Mr. Hincks,* though doubtfully, places the Terebripora 
d'Orbigny as a synonym of Hippothoa. D'Orbigny suggested,! and 
Mr. Hincks repeats in a note " that members of the genus burrow 
in the shells of certain Molluscs," and " our common H. divaricata 
erodes to some extent the surface to which it is attached ; and the 
position of its cells, after their removal, is often marked by a very 
distinct depression" (p. 286). On account of their burrowing habits, 
Dr. FischerJ referred four Jurassic species to the perforating group, 
as follows : — 
Terebripora propinqua Fischer. Oxford Clay : Ardennes. 
,, arachne „ „ Calvados. 
„ producta ,, Kimmeridge : ,, 
„ Michelina Terq. sp. Infra-lias, Hettange. 
In his remarks, however, on a new species of this Genus Tere- 
bripora capillaris, Dr. Dollfus|| has reviewed the whole of the litera- 
ture of the subject, and the student is referred to that paper for 
special details. As regards the present form I have no evidence that 
& Phillipsi burrows in, or even erodes the shell to which it is 
adherent, and the peculiar character of the Zooecia, the mode of 
branching, and the absence of the long caudate appendages, appear 
to me sufficiently characteristic to seperate both Cellaria Smithii and 
& Phillipsi from either Hippothoa or Terebripora, as described by 
d'Orbigny, Fischer, Dollfuss, and Hincks. The position assigned to 
Cellaria Smithii by Haime is in the Fam. Escharidag, as follows :— 
Hippothoa Smithii, Haime. Juras. Bryoz., p. 217. 
= Celleria Smithii, Phill. ; Hippothoa Smithii, Morris, Cat. 
Brit. Foss. 
Alecto Smithii, d'Orb. Prodr. de Pakeont., t i., p. 317, 1850. 
Terebripora antiqua, d'Orb. Prodr. de Palaeont., t i., p. 318, 
* British Marine Polyzoa, \). 286. f Terr. Cret. vol. v. p. 424. 
X 0. Fischer de Bryoza perforants ; Nouvelles archives du Mus. , t ii. , 1886. 
|| 1877, Bryozoare Nouveau du Terr., DeVonien du Cotentin Bulletin de la 
Soc. Linn., 3rd ser. vol. i., pp. 1-16, pL i., f. 3. 
