122 



MOLLUSCA. 



No. 496. Ammonites G-owerianus, Sow. 



From tlie Kelloway Eock (Middle Oolite), England, and now in the Ward 

 Museum of the University of Bochester. Price, $0.50. 



No. 497. Ammonites Henleyi, Sow. 



Pictet refers this to the group " IfacroeepJi- 

 ali." From the Middle Lias, Charmouth, Eng- 

 land, and now in the Ward Museum, University 

 of Rochester. Diameter, 6. Price, $1.00. 



No. 498. Ammonites Herveyi, Sow. 



Probahly the same as A. macroceplialus, Schloth. From the Oxford Clay 

 (Middle Oolite), Wilts, England, and now in the private Geological Cabinet of Mr. 

 Ward, Rochester. Price, $0.75. 



No. 499. Ammonites heterophyllus, Sow. 



This specimen shows well the elegant and leaf-like foliations which charac- 

 terize the group " Heterophylli." It also shows the floor of one of the chambers, 

 with the arrangements of the saddles and lobes. From the Upper Lias, Reutlin- 

 gen, Wirtemberg, and is in the Ward Museum, University of Rochester. 



Diameter, 7. Price, $1.00. 



No. 500. Ammonites heterophyllus, Sow. 



This specimen shows a portion of the internal layer (originally nacreous) over- 

 lying the foliations and retaining the markings of the exterior surface. From the 

 same locality and Museum as the preceding. Diameter, 10. Price, $1.50. 



No. 501. Ammonites Humphriesianus, Sow. 



This species belongs to the group "Coro- 

 nati." From the Lower Oolite, Yeovil, Eng- 

 land, and now in the private Geological Cabinet 

 of Mr. Ward, Rochester.. 



Diameter, 9. Price, $1.50. 



No. 502. Ammonites . 



This curious form from the arrangement of its whorls would appear to be- 

 long to the "BuUati," but in its markings approaches to some of the varieties of 

 ,A. Humphriesianus, Sow. From the Oolite of Calvados, France, and now in the 

 Ward Museum. University of Rochester, Diameter, 6 in. Price, $1.00. 



