238 RECOKDS OF THE AUSTRALIAN MUSEUM. 



de Grossouvre. in his account of the French Upper Chalk 

 Ammonites 4 amended Neumayr's Schlcenbachia, saying — "Je pren- 

 drai done comme espece type de ce genre Schlbnbachia varians." 

 It follows, therefore, if A. varians, J. Sby., is to be considered a 

 typical example of Hystrichoceras, the latter and Schlcenbachia, 

 Grossouvre, are in a measure synonymous, but, if on the other 

 hand, Hyatt's name is restricted to A. coupei, it may not be so. 

 Be this as it may, until we are better acquainted with the limits 

 of Hystrichoceras as intended by Hyatt, I consider it sounder 

 policy to place the Point Charles shells under Schkenbachia 

 rostratus, retaining my specific name antipodeus as a varietal one. 

 The finer structural details, owing to the peculiar state of 

 preservation, are not visible on the Point Charles specimens, but 

 the abdominal tubercles, as in the larger S. rostratus, are canted 

 forwards towards the mouth. 



The fine specimen now to be described, from the collection of 

 the Queensland Museum, combines in one two fossils not hitherto 

 recorded from the Australian Cretaceous. These are an Ammonite, 

 appertaining to the genus Perisphincles, Waagen, and a Pleuro- 

 tomarid, in all probability a species of Leptomaria, Deslonchamps. 

 In their present condition these fossils are simply casts, all trace 

 of the tests having disappeared. Both genei'a are met with in 

 the Jurassic and Cretaceous formations, but these types are 

 essentially Cretaceous. For the opportunity of describing them 

 I am indebted to Mr. C. J. Wild, Acting-Director of the Queens- 

 land Museum. 



Genus Perisphinctes (Waagen), Neumayr and Uhlig, 1881. 



(Palaeontographica, xxvii., 1881, p. 143.) 



Perisphinctes kayseri, X. and U. 



(Plate lxviii.) 



P. kayseri, N. and U., Palaeontographica, xxvii., 3-6, p. 146, 

 pi. xix., figs. 1, \a and b. 



Sp. Chars. — Shell large, obtusely planorbiform ; number of 

 whorls unknown, but the volutions increasing in width slowly; 

 venter convex; flanks rounded, although not greatly so; umbilical 

 or dorsal edge abrupt and declivitous ; section longitudinally 



4 Grossouvre — Mi'm. (arte Geol. Det. Fiance, 1S93, p. 109. 



