PLATE X. 

 Dichograptus — {confinucd). 



FIGS. 



1 (I — e. — Dichograptus octohracJiiaUis (Hall). 



1 a. Small specimen, less rigid than usual. Slape Crags, above 



Hope Gill, Brackentliwaite. Skiddaw Slates. Woodwardian 



Museum. 

 1 h. Eigid form, preserved partly as a cast; seven stipes only. 



? Figured by Salter as D. aranea, Quart. Journ. Geol. Soc, 



1863, vol. xix, p. 137, fig. 9. Skiddaw Slates. Museum of 



Practical Geology, Jermyn Street. 

 1 c. Eiglit-stiped form, showing a well-marked central disc. Skiddaw 



Slates. Museum of Practical Geology, Jermyn Street. 

 1 (/. Large six-stiped form. Randal Crag. Skiddaw Slates. Wood- 



wardian Museum. 

 1 e. Small five-stiped form. Randal Crag. Skiddaw Slates. Wood- 



wardian Museum. 

 2. — Fragments of Dichograptid stipes. 



Original specimen of M'Coy's G. latus. Figured, M'Coy, Quart. Journ. 



Geol. Soc, 1848, vol. iv, p. 223. Knockmurton. Skiddaw 



Slates. Woodwardian Museum. 



3 a, h. — Dichograptus ocfobrachiatus, var. SedgiuicJcii, Salter. 



3 a. Type specimen of D. Sedgndckii. Diagi-ammatically figured by 

 Salter, Quart. Journ. Geol. Soc, 1803, vol. xix, p. 137, fig. 11. 

 Braithwaite. Skiddaw Slates. Museum of Practical Geology, 

 Jermyn Street. 



3 h. Seven-stiped example. Carlside Edge. SkiddaAv Slates. Postle- 



thwaite's Collection. 



4 a, h. — Dicliogvaptus scpiarafiis, Elles. 



4 a. Type specimen. Quart. Journ. Geol. Soc, 1898, vol. liv, p. 



485, fig. 10. Outerside. Skiddaw Slates. Woodwardian 

 Museum. 

 4 b. Ibid., fio-. 10. 



