CEPHALOPODA. 



123 



No. 503. Ammonites interraptus, Brag. 



The varieties of this very variable 

 form have been described under many 

 different names, such as A. Delucii, 

 Brong., A. dentatus, Sow., A. Benetti- 

 anus, Sow., A. serratiis, Sow. etc. 

 From the Lower Cretaceous, St. Floren- 

 tin, France, and now in the Ward Mu- 

 seum, University of Rochester. 



Price, $0.75. 



No. 504. Ammonites interraptus, Park. 



Variety, {A. Delucii, Brong.) From the Gault, France, and now in the pri- 

 vate Geological Cabinet of Mr. Ward, Rochester. Price, $0.75. 



No. 505. Ammonites Jason, Reinecke. 



This beautiful species belongs to the group "Ornati" of "Von Buch. The 

 specimens from the Oxford Clay of Christian Malford, Eng- 

 land, where this was found, are compressed in the marl, 

 but show well two lateral shelly processes developed on 

 each side of the aperture. This feature is found in the 

 young of many species of Ammonites, but is lost on their 

 attaining the adult form. From the Ward Museum, Uni- 

 versity of Rochester. Price, $0.50. 



No. 506. Ammonites Kcenigi, Sow. 



This is a characteristic fossil of the Middle Oolite. It is from the Oxford 

 Clay, Wiltshire, England, and is in the private Geological Cabinet of Mr. Ward. 

 Rochester. Diameter, 7. Price, $1.00, 



jno. 507. Ammonites laticostatns, Sow. 



This is most probably identical with A. capricornus of Schlotheim, and is 

 very typical of the group "Capricomi." In its adult stage, this species loses its 

 characteristic form, and assumes one somewhat resembling A. Bucldi, Sow. In 

 this state it has received various synonyms, but it is best known as A. heterogenics, 

 From the Middle Lias, Charmouth, England, and now in the private Geological 

 Cabinet of Mr. Ward, Rochester. Price, $0.60. 



No. 508. Ammonites Leopoldinus, D'Orb. 



This is closely related to A. radiatus, Brug., and with that form belongs to 

 Von Buch's group, " Flexuosi." From the Lower Neocomian (Lower Cretaceous), 

 Auxerre, France, and now in the private Geological Cabinet of Mr. Ward, Roch- 

 ester. Diameter, 6. Price, $0.75. 



No. 509. Ammonites linguiferus, D'Orb. 



This is an ally of A. Humpliriesianus, Sow. From the Lower Oolite, Cal- 

 vados, France, and now in the Ward Museum, University of Rochester. 



Price, $0.75. 



