PLATE II— continued. 



Fig. Page. 



AgllOStuS rudis, Salter pars. 21 



13, 14. Heads Upper Lingula Flags ; Penmorfa Church. Museum of Practical Geology, 

 uos. 8728 (fig. 13; and 8725 (fig. 14). 



15. Tail. Upper Lingula Flans; Penmorfa Church. Museum ui' Practical Geology, no. M723. 



16. Tail. Upper Lingula Flags; Ogof ddu, Criccieth. Collected by Mr. W. G. Fearnsides. 



Sedgwick Museum, Cambridge. 



Agnostus sidenbladhi ? Linnarsson. 22 



17. Complete individual. Tremadoc Beds; Penniori'a. Collected by Mr. W. G. Fearnsides. 



Sedgwick Museum, Cambridge. 



AgnOStus CalvUS, sp. nov. 23 



18. A complete individual. Tremadoc Beds ; Nant rhos ddu, Arenig. Collected by Mr. W. G. 



Fearnsides. Sedgwick Museum, Cambridge. 



AgnOStus dux, Callaway. 24 



19. The largest specimen known. Shineton Shales ; Shineton. Birmingham University Museum. 



(Figured by Callaway, Quart. Journ. Geol. Soc, vol. xxxiii, pi. xxiv, fig. 3.) 



Agnostus callavei, F. Raw. 25 



20. A large individual. Shineton Shales ; Shineton. Collected by Mr. Rhodes for the Geological 



Survey. 



Agnostus cyclopyge, Tullberg. 27 



21. A complete but poorly preserved specimen ; the actual specimen is an impression only, and 



the drawing is made from a wax cast. Upper Lingula Flags ; White-leaved Oak, 

 Malvern. Oxford University Museum. 



22. Tail. Upper Dolgelly Beds; Dolgelly. British Museum, no. 58494. (Belt's figures of 



Agnostus obtusus, Geol. Mag., vol. v, pi. ii, figs. 15, 16, are probably taken from the 

 specimens on this slab.) 



Agnostus obtusus, Belt. -28 



2:;. Bead. Upper Dolgelly Beds ; Dolgelly. British Museum, no. 58494. (Belt Collection. On 

 the same slab as tig. 22.) 



Agnostus truncatus, Brogger. 



24 Complete but distorted specimen. Menevian ; Solva. Collected by Mr. C. 11. O. Curtis. 

 Sedgwick Museum, Cambridge. 



All the figures are five times the natural size. 



