PLATE IX. 



Troohoceras Yioarii, Whidhorne. (Page 85.) 

 Pig. 



1. Lateral view of an almost perfect specimen, retaining signs of the surface 



ornament although partially obliterated by fossilisation ; 1 a, front view ; 

 1 6, portion of the ornamentation (enlarged). Wolborough. Vicary 

 Collection. 



Teochooeras pulcherrimum, Whidhorne. (Page 86.) 



2. Lateral view of a specimen retaining the shell, partially embedded in matrix. 



Lummaton. Torquay Museum. 



3. Lateral view of a portion of a similar shell, the rest of which was embedded 



in matrix; 3 a, portion of the ventral surface enlarged. Lummaton. My 

 Collection. 



4. Lateral view of another fragment ; 4 a, ventral view with part of the shell 



removed, showing the wall of the uppermost chamber ; 4 h, portion of 

 lateral surface, much enlarged. Wolborough. Vicary Collection. 



Tegchoceras obliquatum, Phillips, sp. (Page 86.) 



5. Lateral view of Phillips' original specimen ; 5 a, dorsal view, showing the 



asymmetry, and the position of the siphuncle ; 5 b, portion of surface 

 enlarged. Wolborough. Museum of Practical Geology. 



6. Lateral view of young ? specimen ; 6 a, ventral view. Wolborough. Museum 



of Practical Geology. 



Teochooeras ebticulatum, Phillips, sp. (Page 89.) 



7. Lateral view of Phillips' original specimen ; 8 a, ventral view ; 8 b, portion 



of surface enlarged. Wolborough. Museum of Practical Geology. 



Troohoceras, sp. (Page 89.) 



8. Lateral view of the cast of a fragment, showing the septa, and also the 



nodes which are rather fewer than the chambers ; 8 a, end view, showing 

 the wall of a chamber and the position of the siphuncle. Wolborough. 

 Vicary Collection. 



Troohoceras Foordianum, n. sp. (Page 83.) 



9. Lateral view of the only specimen known ; 9 a, front view. Wolborough. 



Vicary Collection. 



