PLATE VIII. 



Cor. Sauzeanum. 1 Fig. 1-3, var. Gaudryi, older and younger whorls of the same speci- 

 men, loc. Leicestershire. Fig. 3 a, dorsum showing sutures. 



Aster, obtusum. 2 Fig. 4, 5, young of var. E, showing large tubercles and broad abdo- 

 men. Fig. 6-8, older stage of same specimen. Loc. Lyme Regis. 



Agas. laevigatum. Fig. 9, side view of var. B, with living chamber. Fig. 10, var. D, sec- 

 tion showing the extremely broad young and secondary helmet-shape of the later whorls, which 

 are like those of Psiloceras except of course in the keel (the outline of the centre is uncer- 

 tain except as regards the breadth). Fig. 11, var. A, showing the absence of a keel. Fig. 12, 

 var. D, showing outline of aperture and living chamber, loc. Semur. Fig. 13, very stout young, 

 showing the goniatitic form, and striations like those of Agas. striaries. Fig. 14, section of 

 variety from Lyme Regis. 3 



1 See Plate VI. Fig 4-14. 2 See Plate IX. Fig. 1 



3 All these figures are enlarged about two diameters, except Fig 9 and 12, which are about natural size. 



