PLATE 44. 



Fig. 1. 273. 6. Ensoceras AimtrLATTm. (Pag- 207.) 



1 a. Lateral Tievr of a fragment, showing the arching of the annulationa towards the left side. The fine dark 



transverse lines indicate the edges of the septa. 

 1 b. Longitudinal section, showing the position of the siphuncle, convexity of the septa, and internal tu^s. 



