EXPLANATION OR PLATE IV. 



Fig. 

 9a. Belemnites breviformis, var. a (var. a, Foifz), from Lyme Regis. 



V. Ventral' aspect. 

 /. Lateral aspect. 

 s'. Transverse section. 



9b. Belemnites breviformis, var. a {var. a, Foltz), from Gundershofen. 



V. Ventral aspect. 

 I. Lateral aspect, 

 s'. Longitudinal section, showing a nearly straight axis of guard, and a spherule 



at the apex of the phragmocone. 

 s". Section to show the form of a very young individual. 

 s'". Shows the spherule, 

 s"". The terminal laminae of the guard. 

 s'. Transverse section, showing a slight ventral flattening. 



10a. Belemnites breviformis, var. /3 (var. b,c, Volfz), from Prees, Salop. 

 d. Dorsal aspect. 

 /. Lateral aspect. 

 V. Ventral aspect. 



10b. Belemnites breviformis, var. y, from Ilminster. 

 d. Dorsal aspect. 

 /. Lateral aspect. 

 s'. Section across the alveolus. 

 s". Section across the guard, near the apex. 



10c. Belemnites breviformis, vor. y, from Alderton. 

 d. Dorsal aspect. 

 V. Ventral aspect. 

 /. Lateral aspect. 

 s. Longitudinal section. 

 s, s" . Transverse sections. 



IOd. Belemnites breviformis, var. y. 



I. Lateral view, and d, dorsal view, of a specimen from Glastonbury. 

 s. Longitudinal section of a specimen from Eston Nab, in Yorkshire. 



