CEPHALOPODA. 



129 



No. 546. Baculites anceps, Lam, 



The Ammonitida?, whose forms bave been gradually more and more 

 unrolled as we ascend in the geological series, terminate in the Upper 

 Chalk with this perfectly straight form. The shell of this fossil seems to 

 have been very thin, and usually as in the present specimen, the cast of 

 the chambers alone remains- The original, from the Upper Chalk of 

 France, is in the Ward Museum of the University of Rochester. 



Size, 10 x 3. Price, $1.12. 



No. 547. Ceratites nodosus, De Haan. 



This genus is distinguished by having 

 the [lobes of the sutures serrated while the 

 intervening " saddles" are simple. This speci- 

 men is from the Muschelkalk (Trias), Lune- 

 ville, France, and now in the Ward Museum, 

 University of Eochester. 



Size, 7x5. Price, $0.75. 



No. 548. Ceratites nodoSUS, De Haan. 



From the same locality and Museum as the preceding. Price, $0.50 . 



No 549. Ceratites Syriacus, Von Buch. 



This specimen, from the Cretaceous beds of Mount Lebanon, Syria, is in the 

 Ward Museum in the University of Rochester. Price, $0.40. 



No. 550. Crioceras . 



On pedestal. The original of this specimen was 

 brought by Humboldt from the Lower Cretaceous at 

 Santa Fe de Bogota, S. A. Size, 12 x 10. Price, $8.00. 



No. 551. Crioceras bifurcatus, Quenst. 



From the Jurassic, Reutlingen, Wirtemberg. The original is in the private 

 Geological Cabinet of Mr. Ward, Rochester, N. Y. Price, $0.75 



No. 552. Crioceras Duvalii, Leveiile. 



From the Lower Neocomian (Cretaceous), 

 Escragnolles, France, and now in the private 

 Geological Cabinet of Mr. Ward, Rochester. 



Size, 11 x 8. Price, $1.50. 



