﻿Vol. 66.] DERBYSHIRE AND NOTTINGHAMSHIRE COALFIELD. 333 



diminish in width ; outside these on each side comes a narrow 

 segment. The central narrow segment and the two broad segments 

 are duplicated on the other side of the fossil, thus making up the 

 eight segments of the body (PI. XXIY, fig. 4). 



Pal^oxykis prendeli, Lesquereux. 1 (PI. XXY, figs. 1 & 2.) 



Several specimens of this species have been found in the Shipley 

 Manor and Xewthorpe Claypits. One, especially well preserved, 

 from Shipley, shows a spirally arranged pedicle of unknown length, 

 which expands somewhat suddenly into a broad fusiform body 

 about 2-5 cm. long, and 1-8 cm. broad, composed of four, equal, 

 spirally arranged segments, 6 mm. wide (Dr. Kidston gives six to 

 eight segments). The body shows the usual deformity in the lower 

 third to a very slight degree, although other specimens show it 

 markedly. The beak in this case is beautifully preserved, showing 

 two of the segments, losing their spiral arrangement at the defi- 

 nitely constricted neck, and expanding into two broad alae, which, 

 taking on a double contour at their edges, 2 rapidly taper to a 

 somewhat tumid point, the other £wo segments being presumably 

 applied to these on the other side of the specimen. The beak has 

 the propeller-like twist, as in Palceoocyris helicteroides. Dimensions 

 of beak : 2*1 cm. in length by 1*35 cm. in breadth. 



Paljeoxtris caebonaria, Schimper. 3 



One doubtful and very imperfect specimen was obtained from 

 Brindsley Claypit, and two, contained in one nodule, from Digby. 

 These specimens are too imperfect to add anything to our knowledge 

 of the species. 



Pal2eoxyris (Vetacapsttla) johnsoni, Kidston.* (Pi. XXIV, fig. 5 

 & PI. XXV, fig. 3.) 



Two doubtful examples of this species have been found at 

 Shipley, and one good example at Digby. The Digby specimen 

 (PI. XXIV, fig. 5) is about 5 cm. long (omitting the pedicle), and 

 2 cm. broad, its anterior termination being imperfect. Its body is 

 more globular than in any of the preceding species, and is charac- 

 terized by being made up of a number of very narrow bands, 38 

 having been counted across the broadest part of the fossil. There 

 is very little evidence of a spiral arrangement of these bands ; they 

 apparently run parallel to the long axis of the fossil. In a 

 specimen (PI. XXV, fig. 3), kindly lent to me by Dr. Kidston, from 

 the shale over the Thick Coal, near Bilston, Staffordshire (West- 

 phalian Series), there is a slight twist in the arrangement of the 



i Geol. Surv. Illinois, vol. iv (1870) p. 464 & pi. xxvii, fig. 12. 



a It is possible that the double contour is due to the want of accuracy in 

 the approximation of the corresponding segments on the opposite side of the 

 fossil. There is also seen, on careful examination, the appearance of four 

 segments in the upper tumid portion of the beak, as if they were surrounding 

 an apical opening in the fossil (see PI. XXV, fig. 2). 



3 Stiehler, Zeitschr. d. Deutsch. Geol.Gesellsch. vol. ii (1850) p. 182 & pi. vii. 



4 Proc. Eoy. Phys. Soc. Edin. vol. ix (1885) p. 03. 



