PLATE IX. 



Aster, obtusum. 1 Fig. 1, var. D, loc. Lyme Regis. 



Aster, stellare. Fig. 2, 3, figures reduced to about two thirds, loc. Tubingen. 



Aster, acceleratuin.' 2 Fig. 4 shows variety having the nearest approximation to Aster, 

 stellare. The section is similar to that of Fig. 9, but is more involute. Loc. Semur. 



Aster. Brooki. Fig. 5, 6, stout-whorled, broad-abdomened variety, approximating to 

 Turner!, but with broader sides at the same age. Fig. 7, older stage of the same variety. 

 Figures reduced to about two thirds. Loc. Lyme Regis. 



Aster. Turneri. Fig. 8, 9, old specimen, figures reduced to about two thirds, loc. Semur. 



Aster. Collenoti. 3 Fig. 10, young, showing compressed form and acute abdomen. 

 Fig. 10 a, b, the same more enlarged, but the figures fall short in depicting the acuteness of the 

 abdomen, and by improper shading show a keel which has no existence. Fig. 11, young and 

 older stage ; the young are again too rounded, the outer whorl is however approximately accu- 

 rate. Fig. 11 a, b, centre of same more enlarged, showing the involute form of even this early 

 stage, but the front view is not sufficiently compressed. Loc. Semur. 



Agas. Scipionis. Fig. 12, 13, lateral and sectional view of young, loc. Semur. 



Agas. striaries. Fig, 14, 15, variety with flattened sides and broad abdomen, loc. Semur. 



1 See Plate VIII. Fig. 4, 8. 



2 The umbilical shoulders are not made abrupt enough in this figure, and the umbilicus is shallow as in Aster. 

 .stellare, instead of being deep as in this species. See Plate X. Fig. 3. 



3 See Plate X. Fig. 10. 



