1896.] ^y*^ ISinilh. 



Plate XXII. 



Fig. 1 . Conocardium aliforme Sowerby 347 



1 a. Side view, natural size. 



16. Side view of anotlier specimen, twice enlarged. 

 Fig. 2. Conocardium aliforme Sowerby. 



3 a. Another specimen, from aliove. 



2 b. From front, 



3 c. From side. 



Fig. 3, Schizodus cuneatus Meelv 245 



3 a. Side view. 



3 b. Front view. 



Fig. 4. Schizodus wheelcri Swallow 246 



Fig. o. Phillipsia cliftonensis Shumard 370 



5 a. From above, twice enlarged. 



5 b. Side view, twice enlarged. 

 Fig. 6. Phillipsia {Griffithidcs) ornata Vogdes, twice enlarged 371 



Plate XXIII. 



Gastrioceras branneri, sp. nov., J. P. Smith 257 



Fig. 1. Side view. 



Fig. 2. Front view. 



Fig. 3. Rear view. 



Fig. 4. Cross section. 



Fig. 5. Sutures of adult, twice enlarged. 



Fig. 6. Sutures at diameter 33 millimetres, twice enlarged. 

 Pronorites prmpermictis Karpiusky (to show the young stages. After 

 Karpinsky, Ammonecn d.Artinsk-Stufe, PI. i. Fig. 3 e, f,g). 



Fig. 7. First two sutures. 



Fig. 8. Embryo-chamber. 

 Pronorites cyclolobus Phillips (Geol. Yorkshire, Vol. ii, PL xx, Fig. 42). 



Fig. 9. Sutures, twuce enlarged. 



Plate XXIY. 



Pronorites cyclolobus Phillips (variety arkansiensis J. P. Smith) .... 267 

 Fig. 1. Side view, Arkansas specimen. 

 Fig. 2. Rear view, Arkansas specimen. 

 Fig. 3. Front view, Arkansas specimen. 

 Fig. 4. Sutures, Arkansas specimen. 

 Fig. 5. Side view of Ural Mountains specimen (after Karpinsky, Am- 



moneen d. Artinsk- Stiife, PI. i, Fig. 4 a, b). 

 Fig. 6. (After Karpinsky, Ammoneen d. Artiiisk-Stufe, PI. i. Fig, An.) 

 Fig, 7. (xifter Karpinsky, Ammoneen d. Artinsk-Stufe, PI. i. Fig. 4 m,) 

 Fig, 8, (After Karpinsky, Ammoneen d. Artinsk-Stufe, PL i, Fig. 4 e, /. ) 

 Fig. 9. Showing development of the sutures, from the Ibergiceras to 

 the Pronorites stage, after Karpinsky (PL i, Fig. 4 g-l). 



