8-4 BULLETIN OF THE 



Liparoceras indecisum Hyatt. 



Loo. Lyme Regis, Balingen, and Rautenberg bei Schoppenstadt ; Coll. 

 B. M. Wright, L. de Koninck, and Dr. Krantz. 



This species is closely allied to Liparoceras Henleyi, but differs in the 

 form of the whorls which are much flatter on the sides, do not spread lat- 

 erally so rapidly, and arc more numerous. 



The tubercles and lateral pike are hardly so prominent, but more nu- 

 merous than in Henleyi. The specimen from Rautenberg, which apparently 

 belongs to this species, has the tubercles and displays the characteristics of 

 ilicroceras in the abdominal pilaa on the fourth whorl. The envelopment 

 Lardy covers the external line of tubercles, which are larger and more 

 prominent than the internal line of tubercles. Septa were not observed. 



Liparoceras Henleyi Hyatt. 



Amm. Henleyi Sow., Min. Conch., v. 2, p. 161, pi. 172. 

 NauL striatum Rein, Naut. et Argo, p. 85, ph. 8, figs. Go, GG. 

 A nun. striatum Ziet., Vcrst. Wiirt., pi. 5, fig. G. 

 A mm. Henleyi Bronn, Lcth. Geog., p. 4 4 0. pi. 23, fig. 7. 

 Loc. Hcwlitt's Hill, Stonehouse, Lyme Regis, Bourgngne, Milhand, St. 

 Thibault, Vcnarey, Evrecy in Normandy, and Reschnau in Lippe ; Coll. 

 L. de Koninck, B. M. Wright, M. Boucault, Dr. Krantz, and Prof. Bronn. 



Liparoceras Bechei Hyatt. 



Amm. Dechei Sou-.. Min. Conch., v. 3, p. 143, pi. 280. 

 A mm. Bechei Ziet., Verst. Wiirt., p. . n >", pi. 28, fig. 4. 

 Loc. Lyme Regis, Seinur, Milhaud, St. Amand, Balingen, and Rauten- 

 berg : Coll. B. M. Wright, M. Boucault, L. de Koninck, and Dr. Krantz. 



DEROCERATIDH. 

 Deroceras Hyatt. 

 Deroceras Davoei Hyatt. 



Amm. Davoei Sow., Min. Conch., v. 4, p. 71, pi. 350. 

 Amm. Davoei Ziet., Verst. Wiirt., p. 1!*, pi. 14, Li-r. -• 

 Amm. Davoei D'Orb., Terr. Jurass., 1, p. 276, pi. 81. 

 Amm. Davoei Quens'dt, Die Ceph., p. 91, pi. 5, fig. G. 

 Loc. Seinur, Ardeche, Vassy, Ginund, Elsass, and Durrenberg; CoIL 

 M. Boucault, Dr. Krantz, Prof. Bronn, and Mus. of Stuttgart. 



Deroceras densinodum IIvatt. 



Amm. armatus densinodum Quens'dt, Der Jura. p. 105, pi. 13, figs. 9, 10. 

 Loe. Zurmicthen bei Iloltzmiinden ; Coll. Mas. of Stuttgart. 



