Mr. G. R. Vine on a Species o/* Entalopliora. 17 



I'^iff. 4. Tangential section of Clathrodictyon laxum, Nicli., from the Cor- 



niferous Limestone, Ontario. 

 Fig. 5. Vertical section of the same. 

 Fig. 6. Tangential section of Clathrodicti/on retiforme, Nich, & Mur. sp., 



from the Hamilton formation of Canada. 

 Fiff. 7. Vertical section of the same. The right-hand half of the portion 



figured cuts through one of the astrorhizal cylinders near its 



centre; the left-hand portion traverses an adjoining cylinder 



near its periphery. 

 Fig. 8. Portion of the surface of the same, of the natural size. 

 Fig. 9. Part oHhesiiv^ace of Strotnatoporella? tuhercidata, Nich., enlarged 



about twice. Corniferous Limestone, Ontario. 

 Fig. 10. Tangential section of the same. 

 Fig. 11. Vertical section of the same. 



II. — Notes on a Species of Entalopliora from the Neocomian 

 Clay of Lincolnshire. By G. R. Vine. 



In his paper on the Closure of the Cyclostoraatous Bryozoa *, 

 Mr. A. W. Waters refers to several peculiarities of the cell- 

 coverings of Palseozoic species. In speaking- of what he callel 

 Entalophora rugosa, d'Orb., from Naples, Mr. Waters says : 

 " The most usual position for the calcareous plate which closes 

 the tube would seem to be about the point where the zooecial 

 tube rises free from the zoarium " (p. 401). Kemarking on 

 the closure of the aperture in Carboniferous Polyporce and 

 Fenestellce^ the author refers to and quotes a previous obser- 

 vation, made as far back as 1878, wherein he says : '' In 

 the Cyclostomata the cells are often after a time closed by a 

 diaphragm, in most cases some little distance down the 

 tube "f. In all these observations I have been able to confirm 

 Mr. Waters's statements ; but there is a very great difference 

 between the closure of Paleozoic and recent Cyclostomata. 



It is not, however, for the purpose of controverting, or even 

 of further commenting on Mr. Waters's views that I send you 

 the present notes, but to furnish new material for the student 

 of our fossil Polyzoa. 



Through the kindness of Mr. H. Wallis Kew, of Louth, I 

 have been able to examine in detail specimens of Entalophora 

 from the Neocomian Clay at Donington-on-Bain near Louth, 

 in Lincolnshire. Before receiving the present examples 

 I was altogether unacquainted with species of Polyzoa from 

 this locality, and I have searched in vain for previous records 

 of species found in the Lincolnshire horizon. I have compared 



* Journ. Linn. Soc. Zool. vol. xvii. 1884, p. 400. 

 t Mauch. Geol. Soc. Tr. 1878, p. 2 of paper. 



Ann. (& Mag. N. Hist. Ser. 5. Vol. xix. 2 



