PLATE XII. 

 Temnograptus, Nicholson ; Bryograptus, Lapwortli ; and Trichograptus, Nicholson, 



B'IGS. 



1. — Temnograptus multipleve, Nicholson. 



Two specimens on same slab. Right-hand one figured by Nicholson, 



Quart. Journ. Geol. Soc, 1868, vol. xxiv, pi. vi, figs. 1 — 3 ; 



left-hand specimen figured by Elles, Quart. Journ. Geol. Soc, 



vol. liv, p. 477, fig. 6. Peelwyke, Bassentliwaite. Skiddaw 



Slates. Christopherson's Collection. 

 2. — Bryograptus divergens, Elles and Wood. 



Specimen preserved partially in relief. Figured by Marr as Bryograptus 



Gallavei (?), Geol. Mag., 1894, p. 130, fig. 6. Barf. Lower 



Skiddaw Slates. Woodwardian Museum. 



3 a, b. — Bryograptus Ejerulfi, Lapworth. 



3 a. Specimen figured by Salter as Dichograpsus, sp.. Quart. Journ. 

 Geol. Soc, 1863, vol. xix, p. 137, fig. 12. Keswick. Skiddaw 

 Slates. Museum of Practical Geology, Jermyn Street. 



3 h. Large slab, showing specimens of B. Kjerulfi associated with its 



variety v. cumhrensis. Figured, Marr, Geol. Mag., 1894, p. 130, 

 fig. 1. Barf. Skiddaw Slates. Postlethwaite's Collection. 



4 a — c. — Bryograptus, var. cumhrensis, Elles. 



4 a. Three specimens in association, the largest showing conspicuous 



sicula with its nema. Figured, Marr, Geol. Mag., 1894, p. 130, 

 fig. 3. Barf. Lower Skiddaw Slates. Woodwardian Museum. 



4 h. Small specimen on same slab as 4 «. Figured, Marr, op. cit., 

 figs. 4, 5. 



4 c. Specimen from Barf. Lower Skiddaw Slates. Lapworth's 

 Collection. 

 5. — Trichograptus fragilis, Nicholson. 



Type specimen. Figured, Nicholson, Ann. and Mag. Nat. Hist. (4), 

 vol. iv, pi. xi, figs. 1 — 3. Thornship Beck, near Shap. Upper 

 Skiddaw Slates. Natural History Museum, S. Kensington. 



