8o 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I44 



Museum d'HistoIre Naturelle, Geneve. De Loriol referred this 

 species to Botriopygus = Pygorhynchus, but Lambert and Thiery 

 (1921, p. 339) placed it in Pygaulus. In its lower test, this species 

 resembles Pygorhynchus, but its sides are parallel, both posterior and 

 anterior margins are rounded, and its periproct is inframarginal — all 

 characters of Pygaulus. 



Included also are photographs (pi. ii, figs. 8, 9) of the holotype 

 of Pygaulus cousensis Demoly and Lambert (1913, p. 201). This 

 specimen is in the Lambert Collection at the Sorbonne, Paris. 



Range and distribution. — Cretaceous (Neocomian to Cenomanian) 

 of Europe. 



DESCRIPTION OF TYPE SPECIES 



PYGAULUS DESMOULINSII Agassiz 



Plate II, figures 10-12; text figures 64, 65 



Pygaulus desmoulinsii L. Agassiz in L. Agassiz and Desor, 1847. Ann. Sci. 

 Nat., ser. 3, vol. 7, p. 158. 



Material. — Eight specimens studied in the collections of the U. S. 

 National Museum; two in the Lambert Collection, Sorbonne, Paris. 



Shape. — Medium size, elongate, with almost straight sides, cylin- 

 drical shaped, adorally highly inflated, in some specimens slightly 



65 



64 



Figs. 64, 65. — Pygaulus desmoulinsii Agassiz : 64, Phyllode of specimen in 

 Lambert Collection, Sorbonne, Paris, from the Neocomian, X 10 J 65, apical sys- 

 tem of USNM 131259. from the Barremian at Lussan, X iS- 



