PLATE II. 



Fig. 



\a. Amaltheus siibpinatus, S. 8. Buckman, natural size, show- 

 ing the spines, zone of Harpoceras Soiverlyi, Half-way 

 House, near Sherborne, Dorset. The greater portion of 

 the test is well preserved. My collection. The keel is 

 somewhat crenulated. 



\b. The same, showing the ventral area and the apertui-e. 

 The keel and ribs should be somewhat more conspicuous. 



\c. Another specimen to show the finish of the mouth-border. 

 It is really much produced on the ventral area, but is 

 here broken off. Zone of Harpoceras Sowerhji, Bradford 

 Abbas, Dorset. Collected by my father. 



2a. Cosmoceras Hollandae, nobis, a variety. Zone of Har- 

 poceras Murchisonae, near Sherborne, Dorset. My collec- 

 tion. 



3«. Sphaeroceras ManselUi, J. Buckman, showing, the peculiar 

 finish to the mouth border. The ribs are numerous and 

 very sharp. From Clateombe, near Sherborne, Dorset. 

 Collection of Mr. T. C. Maggs. 



3 J. The same, showing ventral area and aperture. 



Aa. Sphaeroceras expansum, nobis, from near Sherborne, Dorset, 

 probably zone of Stephan. Humphriesianum. Collected 

 by my father. 



Ah. The same, showing ventral area and broad aperture. 



