EXPLANATION OF PLATE 44'. 69 



careous partitions is least near the margin of the 

 lamellae. See Fig. 6'. (Original.) 



Fig. 6'". Columnar appearance of the sinuous partitions 

 when viewed laterally. (Original.) 



Fig. 7. Unique specimen of Belemnites ovalis, from the 

 Lias at Lyme Regis, in the collection of Miss 

 Philpotts. A fracture at b , shows the chambered 

 areola? of the Alveolus. At e. the thin conical 

 anterior horny sheath originates in the edge of the 

 calcareous sheath, and extends to e". The surface 

 of this anterior sheath exhibits wavy transverse 

 lines of growth; it is much decomposed, slightly 

 nacreous, and flattened by pressure. 



Within this anterior conical sheath the Ink-bag 

 is seen at c, somewhat decomposed, and partially 

 altered to a dark gray colour. (Original.) 



Fig. 8. Portion of the Ink-bag broken off* from Fig. 7. c. 

 and covered by that portion of the horny case which 

 lay above it. The transverse lines e. on this por- 

 tion, are the continuation of the lines of growth on 

 the horny sheath of Fig. 7. e. e'. e". (Original.) 



Fig. 9. Belemnites Pistilliformis? from the Lias at Lyme, 

 in the collection of Miss Philpotts, having a portion 

 of its ink-bag at c. (Original.) 



Figs. 10. 11. 12. Belemnites from the Jura limestone of 

 Solenhofen, figured by Count Munster in Boue's 

 Memoires Geologiques, Vol. I. PI. 4. In 10 and 12 

 the form of the anterior horny sheath is preserved, 

 to a length equal to that of the calcareous shaft of 

 the Belemnite, but in none of them is the Ink-bag 

 visible.* (Munster.) 



* Von Meyer mentions (Palasologica, P. 322, 1st. Edit. 1832,) that 

 he has seen an Ink-bag at the upper end of a Belemnite from the 

 Lias of Banz, and asks, " Do Belemnites possess an Ink-bag like that 

 of the Sepia?" 



