G. R. VINE ON THE FAMILY DIASTOPORIDiE. 



383 



completes a perfect circle " *. He further says, D. liasica " occurs 

 so abundantly, and precisely on shells of the Jurensis zone, that you 

 can often identify your horizon from it." The specimen he figures 

 is found on Ammonites jurensis. 



Jules Haime t, in correlating Berenicea striata, says that this 

 species was discovered by M. Terquem in the Lias of Valiere. He 

 says : — "D. liasica, Quenstedt, Handb. der Petrefact. p. 637, pi. lvi. 

 fig. 10, " is closely related to this species : it begins in the same 

 manner with a plate in the shape of a fan ; but it branches out more 

 on the outside.'' 



Dumortier, in his ' Palaeontological Studies of the Jurassic De- 

 posits of the Basin of the Khone,' recognizes another species, as he 

 calls it, in the fourth part of the Superior Lias. This he names 

 D.crussolensis ; and the only distinguishing feature between this 

 and D. liasica is " that it grows thicker than the last, and the form 

 of the colony is more circular " J. 



In Mr. E. A. Walford's pamphlet on some Upper and Middle Lias 

 beds in the neighbourhood of Banbury §, the author relies upon 

 Quenstedt' s description for the identification of his specimens found 

 in the zone of Amm. spinatus, and also in the transition-bed, on 

 corals and shells. 



In the best work on Oolitic Polyzoa that I have yet met with, 

 'Description of the Fossil Bryozoa of the Jurassic Pormation ' ||, 

 Jules Haime divides his typical Diastoporidae into two groups, the 

 JBerenicece and the Biastoporce. The incrusting forms treated of as 

 Biastoporce in this paper belong to the first group of Haime. His 

 species are : — B. diluviana, Lam., a common form of the Great 

 Oolite ; B. Archiaci, Haime ; B. microstoma, Mich. ; and B. lucensis, 

 Haime. Both of these last are found in the Bradford Clay and the 

 Great Oolite, very beautiful species with very characteristic cells. 

 The Biastoporce of Haime belong to the Poliaceous group. Another 

 paper, by Prof. D. Brauns 4 !]", contains some very valuable in- 

 formation on both the foliaceous (especially Elea) and incrusting 

 Diastoporidae. 



Mr. Walford has placed in my hands, for description or study, the 

 whole of his local fossil Polyzoa ; and so inadequately have the 

 species been described and figured, that, for scientific purposes, the 

 labours of these eminent palaeontologists are almost useless. In 

 giving the Liassic species a new name, I have had regard more 

 particularly to its typical character than to any thing else. In this 

 Liassic type I recognize a family likeness to later fossil and more 

 recent Stomatoporce ; and it will be advantageous to science to draw 

 attention to the fact. 



* ' Der Jura,' pp. 279-292, fig. 1, tab. 40. 



t Bryoz. fossiles de la form. Jurass., in Mem. Soc. Geol. de France, 1854. 

 t Dumortier, I. c. p. 226. pi. 48. figs. 11, 12. 



§ Proceedings of the Warwickshire Naturalists' and Archasological Club, 1878. 

 || Log. cit. 



Zeitschr. d. deutschen geolog. Gesellsch. 1879. 



