032 



ME. E. A. WALFOKD ON SOME 



43. Notes on some Poltzoa from the Lias. 

 By Edwin A. Walfoed, Esq., F.G.S. (Read June 23, 1887.) 



[Plate XXV.] 



The Polyzoa of the Lias at present known seem to be restricted to 

 the genera Stomatopora, Proboscina, Spiropora, Neuropora, Licheno- 

 pora, Semimulticlausa, Diastopora (Berenicea being by later syste- 

 matists classed with the Blastopores), and the genus it is now 

 proposed to add, viz. Tubulipora. 



History. 



In Morris's Catalogue of British Fossils/ published in 1854, there 

 is no record of Polyzoa from the Lias ; but the steadily accumulating 

 records of paheontological work enabled Mr. R. Etheridge, F.R.S., 

 in 1882, in his Presidential Address to the Geological Society * to 

 tabulate three genera and six species. Yinef in the British 

 Association Report for the same year reviews but three genera and 

 four species. French and German authors have, however, increased 

 the number. Although Deslongchamps % 9 having turned over his 

 Neuropora to the Spongidse, mentions but two genera, representing as 

 many species, Haime § can add but one species more, saying, at the 

 end of his admirable monograph, u on ne connait encore aucun 

 bryozoaire dans le lias moyen ni dans le lias superieur." Terquem 

 and Piette || in 1865 recognize, in addition to some forms previously 

 described by Fromentel three genera new to the Lower Lias, and 

 add also six new species : a few years later Dumortier ** catalogues 

 in his list of fossils from the several divisions of the Lias of the 

 Rhone basin seven species, of which four are new. Their occurrence 

 in the Lias of Germany appears to be very rare, for Quenstedt and 

 Oppel mention but one species. 



The rarity of Polyzoa in the Lias of England has been pointed out 

 by Prof. Tate tf when describing a new species of Spiropora from 

 the Upper Lias (Leptsena-beds) of May, Normandy. To that species 

 (Spiropora liassica) he refers other Polyzoa from the Middle Lias 

 of King's Sutton, Northamptonshire, in Mr. Beesley's collection. 



* " On the Analysis & Distrib. of Brit. Jurass. Foss.," by R. Etheridge, 

 F.R.S., &c, Quart. Journ. Geol. Soc. vol. xxxviii. Proc. p. 152 (1882). 



t Third Report on Foss. Polyzoa (Jurass. sp., Brit, area only) by Dr. H. C. 

 Sorby, F.R.S., and Q. R. Vine, Brit. Assoc. 1882. 



$ 1 Etudes Jurass. Inf. de la Normandie,' par M. E. Eudes-Deslongchamps, 

 Paris and Caen, 1864. 



§ " Descr. des Bryozoaires Foss. par Jules Haime," Mem. Soc. Geol. de 

 France, 2 e serie, t. v. (1854). 



|| Terquem & Piette, " Lias inf. de l'est de la France," Mem. Soc. Geol. de 

 France, 2 e serie, t. viii. p. 124. 



«[ Fromentel, E., "Pal. de la Cote-d'Or," Mem. Soc. Geol. de France, 2 e serie, t, 

 vii. p. 91. 



** Dumortier, E.," Etudes Pal. sur les Dep. Jurass. du Bassin du Rhone," 

 Paris, 1864-1874. 



tt Tate, R., "On some New Liassic Fossils," Geol. Mag. dec. 2, vol. ii. p. 205. 



