119 



CEPHALOPODA. 



No. 47G. Ammonites Birchii, Sow. 



This elegant form, with the outer markings 

 of the shell visible upon all its whorls, and a 

 double row of spines, belongs to the group 

 "Ai'mati.'' It is from the Lower Lias, Char- 

 mouth, England, and belongs to the Ward 

 Museum, University of Rochester. 



Diameter, 8. Price, $1.25. 



No. 477. Ammonites Bechei, Sow. 



This species, closely related to A. Henleyi, Sow., is from the Middle Lias, 

 Charmouth, England, and the specimen is in the private Geological Cabinet of Mr. 

 Ward, Rochester. Price, $0.75. 



No. 478. Ammonites Brongniarti, Sow. 



This curiously inflated species is from the Lower Oolite, Yeovil, England, and 

 is in the private Geological Cabinet of Mr. Ward, Rochester. 



Diameter, 10. Price, $1.25. 



No. 479. Ammonites concavus, Sow. 



This species belongs to the group, "Disci." From 

 the Lower Oolite, Bridport, England, and now in 

 the Ward Museum, University of Rochester. 



Price, $0.70. 



No. 480. Ammonites communis, Sow. 



This species is characteristic of a zone near the base of the Upper Lias, in 

 which it is associated with many closely allied forms, some of which at least are 

 only varieties. The specimen is from Whitby, England, and is in the private 

 Geological Cabinet of Mr. Ward, Rochester. Price, $0.50. 



No. 481. Ammonites Comptoni, Pratt. 



This species is closely allied to the well known 

 A. Jason, but is distinguished from it by wanting 

 the spines which ornament that species. Like it, 

 it has long, narrow, lateral processes extending 

 from the lip of the shell. It is associated with A. 

 Jason in the Oxford Clay (Middle Oolite), Chris- 

 tian Malford, Eng. P rice; $ 60 



