512 BRITISH GRAPTOLITES. 



Welsh Border : Builtli Road ; Coed Mawr ; Castle Crab, near Bniltli ; Coppice 

 House, near Middletown. Dee Valleij : Moel Ferna Slate Quarries. 



Associates. — Gijrtog. Linnarssonl is sometimes fairly common in the Middle 

 Wenlock Shales, where it is characteristic of a definite zone ; it is found with 

 Monog. flexilis, M. duhius, and M. Flemingii var. primus. 



Collections. — Sedgwick Museum, Watney and Welch, Lapworth, and the 

 Authors. 



Cyrtograptus Grayi, Lapworth, Plate LII, fig. 5. 



1876. Cyrtograptus Grayi, Lapworth, G-eol. Mag. [2], vol. iii, p. 545, pi. xx, fig. 11. 



Polypary uniformly slender ; stipe with graceful curvature and cladia of two 



generations, several centimetres in length but not exceeding '7 mm. in 



width. Thecse nine in 10 mm., of the general type of those of 31. dextrorsus. 



Description. — The graceful curvature of the stipe is most pronounced ; it is, 



however, somewhat irregular in its nature, the thecee being sometimes on the 



convex, sometimes on the concave side of the poly- 



¥10.2,59.— Cyrtograptus Grayi, i i t n ^ i 



Lapworth. V^^J: ^^^^ stipc and cladia all appear to nave an 



^ approximately uniform breadth of about *6 mm. 



\i:f. The thecse are not well preserved on the only 



[vj, specimen known to us belonging to this species ; 



[L but so far as can be seen they appear to be of the 



!K same type throughout, and to approximate to the 



•' general type of those of M. dextrorsus 



if 



« Affinities. — The great flexibility of the polypary 



'i_ and the shape of its thecee make Cyrtog. Graiji 



an easily recognised species. Up to the present, 



Distal thecae of part of cladium. En- ... t, c -, T.-ciciiij 



largement of part of PI. LII, fig. 5. it IS Only known trom One locality m S. Scotland; 



the examples from the Lake District which have 

 been assigned to this species appear, upon re-examination, to be specimens of 

 Monog. crispus crossing each other in intricate fashion. 



Horizon and Localities. — Upper Gala (top of Penkill Beds). 



8. Scotland : Penwhapple Glen. 



Associates, etc. — Monog. priodon and Retiolites [Gladiog.) Geinitzianns. 



CoUectioji. — Mrs. Gray. 



Cyrtograptus Carruthersi, Lapworth. Plate LII, figs. 4 a — c. 



1876. Cyrtograptus Carruthersi, Lapworth, Greol. Mag. [2], vol. iii, pp. 321, 544, pi. x, figs. 6 a — c. 

 1900. Cyrtograptus Carruthersi, EUes, Quart. Journ. G-eol. Soc, vol. ivi, p. 408, text-fig. 21. 



Polypary slender, stipe several cm. in length, with graceful double curvature 

 in proximal portion, but with less curvature distally. Cladia few in 



