VINE : POLYZOA OF REDESDALE. 



63 



Fragments of this species are present in the shales, but are very- 

 rare. The beautiful ornamentation of the surface of the specimens 

 are not so well preserved as in the Scotch forms from Hairmyres, but 

 the character of the type species — two cells between each pinna on 

 either side of the stem — is sufficiently distinct. The species may be 

 easily recognised. 



2 Pinnatopora retroflexa Young and Young. 



= Glauconome retroflexa Young and Young, Proceed. Nat. 



Hist. Soc. Glasgow, pi. ii., figs. 8-10; pi. iii., figs. 11- 13. 

 = Glauco7iome retroflexa Vine, Proceed. Geo. Polyt. Soc. 

 Yorkshire, 1882, vol. vii., p. 335. 

 This is a rare species in this locality, though in Yorkshire it is 

 fairly abundant, in the Scotch Shales very abundant. The species is 

 easily identified, on account of the backward flexure of the short 

 pinnae. In the Scotch specimens the cells are deeply buried in the 

 branch, and the keel is very prominent, and the ornamentation of 

 the surface is very beautiful. None of these features are absent in 

 the Northumberland specimens. 



3 Pinnatopora flexicarinata Young and Young. 



= Glauconome flexicarinata Young and Young, Proceed. 

 Nat. His. Soc. Glasgow, pi. ii., figs. 1-7. 

 The beautiful ornamentation of the surface of the Zoarium is not 

 so prominent in the English as in the Scotch specimens. There is 

 ample evidence in this as in other fragments of Polyzoa, that the 

 whole have been water-worn and very much compressed. The 

 Entomostraca of the same shales, however, are full and plump ; so 

 also are some of the Foraminifera. The species is rather rare. 



Fam. DIPLOPORIDJE Vine. 

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



Zoarium fenestrated, or partly free and fenestrated. Zocecia 

 arranged biserially in the branches, opening on one side only. Supple- 

 mentary pores, or foramina, in all the species of the various genera, 

 but in one group the foramina are found on the reverse also. 



4 Acanthopora stellipora Young and Young. 



= Glauconome stellipora Young and Young, Quar. Jour. 



Geol. Soc, Dec. 1874, p. 682, pi. xi., figs. 5-1 1. 

 = G, stellipora Vine, Proceed. Geo. Polyt. Soc. Yorkshire? 

 vol. vii., 1882, p. 333. 

 The fragments of this species are very well preserved, and in some 

 the characters are pretty perfect. Mr. A. W. Waters, in a paper on 

 the 'closure' of the cells of Cyclostomatous Polyzoa"^ directs atten- 



* I^innsean Society's Journal — Zoology, vol. xvii. 1884, p. 401. 

 Oct. 1884. 



