EXPLANATION OF PLATE X. 



Fio. 



28. Bklemnites l^vis. (Whitby Museum.) 



/'. Belemnites trivialis — sketch from a specimen in the Whitby Museum. 

 Lateral view. 



/". Belemnites Icevis — sketch from a specimen in the Whitby Museum. Lateral 

 view. 



V. Ventral aspect, near the apex. 

 d. Dorsal aspect, near the apex. 

 a. Strise, near the apex, magnified. 

 a". Striae broken into short plaits. 



24. Belemnites dorsalis, n. s. (Collection of Prof. Phillips.) 



/'. Lateral aspect, the specimen slightly angular. 



/". Another specimen, seen laterally. 



d. A specimen seen dorsally, to show the short interrupted groove. 



a. Striated apex ; not a common occurrence. 



a'. Transverse section near the alveolus. 



s" . Transverse section towards the apex. 



25. Belemnites striolatus, n. s. (Whitby.) 



/. Specimen seen laterally, with fine striae towards the entire apex. 



V. Specimen seen ventrally, with similar striae. 



a. The striae, magnified. 



s. Transverse section. 



26. Bei,emnites l.evis. (Whitby.) 



/. Specimen seen laterally, showing striation near the apex. 



V. The same, seen ventrally. 



s. Longitudinal section, showing arched alveolar cavity. 



0. Section of phragmocone and spherule. 



-S'. Transverse section. 



27. Belemnites subtenuis. 



/. Side view, showing one of the long faint dorso-lateral grooves. 

 V. Ventral aspect, showing the faint ventral groove. 

 d. Dorsal aspect, showing the two dorso-lateral grooves, 

 .y'. Section across the alveolus. 



Section across the guard, in the middle. 

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



a. Striae, near the apex. The specimens were collected by Prof. Phillips at 

 Saltwick, near Whitby, in Upper Lias. 



