EXPLANATION OF PLATE XIII 



Fig. 



31. Belemnites microstylus, n. s. 



g'. Specimen belonging to the Geological Survey, and preserved in the Museum 



("No. 349"), Jermyn Street. Lyme Regis. 

 g". Magnified view of the phragmocone and the enveloping sheath, 

 o. Specimen in the Oxford Museum (part of Mr. Murley's Collection) ; from the 



Upper Lias of Dumbleton. The apex is broken off. 



32. Belemnites longissimus. (Lyme Regis.) 



/. Seen laterally. 



a. The striation at the apex. 



s.' Transverse section. 



33. Belemnites junceus, n. s. (Lyme Regis.) 



The transverse sections {s, s) show concentric sheaths, with undulations corre- 

 sponding to the grooves ; radiating fibres obscure. 



34(7. Belemnites nitidus, n. s. (Lyme Regis.) Lateral views (/). 



The transverse section (^'j shows the lateral undulations and almost central 

 axis. 



34 /j. A shorter variety, which has some affinity to B. apicicurvaius. Lyme Regis. 



35. Belemnites quadricanaliculatus, (Upper Lias [Sands], Chidcock.) Specimens 

 in the Museum of the Geological Survey, Jermyn Street. Mr. Moore's 

 Collection contains examples from the Upper Lias of Ilrainster. 

 V, v\ Ventral ; d, d', dorsal ; /, /', lateral. 



