62 



vine: polyzoa of redesdale. 



Polyzoa, which are published in the 'Transactions of the Yorkshire 

 Geo. and Polytec. Society' for the years 1882 and 1884, maybe more 

 accessible than others of my writings to geological students. In these 

 papers I have described species found in Derbyshire and North 

 Yorkshire, and it may be well to compare the list of species in the 

 present paper with the lists given in the papers referred to. The 

 groups are classified, and the species are arranged, in accordance with 

 that formulated in my Fourth British Association Report on Fossil 

 Polyzoa, 1883. 



Sub-order cyclostomata Busk. 



See Part III. Brit. Mus. Catalogue of Cyclostomatous Polyzoa, Hincks, Brit. 

 Marine Polyzoa. 



Fam. FENESTELLID^ (restricted). 

 Fourth Brit. Assoc. Rep. Foss. Polyzoa, 1883. 



ZoARiUM forming large or small fenestrated or non-fenestrated 

 expansions. Zocecia arranged biserially in the branch; tubular, but 

 slightly tnmcated* at the distal extremity; orifice circular, opening 

 on one side only. Branches united by dissepiments, or free. 



Genera: Fenestella Miller and Lonsd.; Ptilopora M'Coy; 

 and Pinnatopora Vine. 



Genus FENESTELLA Miller and Lonsd. 



It is impossible to give any special details of species belonging to 

 this genus. The few fragments that I have collected I place without 

 the least hesitation under the name of M 'Coy's well-known and 

 widely-distributed Fenestella plebeia M'Coy. One or two specimens 

 may be referred to another species, but I should not be inclined to 

 hazard an expression of opinion adverse to the above unless I had 

 better evidence than I now possess. 



Genus PINNATOPORA Vine. 

 Fourth Brit. Assoc. Rep. Foss. Polyzoa, 1883. 



= Glauconome : M'Coy; Young; Vine, in papers on Carboniferous Polyzoa. 

 (Not Glaitconome disticha Goldfass.) 



ZoARiUM pinnated ; with secondary branches likewise pinnated ; 

 but rarely fenestrated by the inosculation of pinns. Zocecia tubular, 

 arranged biserially, originating immediately beneath, or in a line 

 with the keel. Carina feebly developed in some, well developed in 

 other species, ornamented with the bases of spines or plain ; no 

 secondary pores. Ocecia, an inflated cell (?). ♦ 

 I Pinnatopora elegans Young and Young. 



= Glauconome elegans Young and Young, Proceed. Nat. 



Hist. Soc. Glasgow, March 1875, pi. xvi. fig. 4. 

 = G. elegans Vine, 'Garb. Polyzoa,' Proceed. Geo. Polyt. Soc. 

 Yorkshire, 1882, vol. vii., p. 334, pi. xvi. fig. 4. 



*This has reference to the cell as seen in sections. 



Naturalist, 



