195 



having a wider umbilicus. This may perhaps be a variety of 

 Cadoceras crassum. 



Perisphinctes. Waagen. 

 Pensphinctes sp. cf. Panderi. а'Оквшхт. 



PI. X, fig. 3. 



1890. Perisphinctes Panderi. Michalski, A. Die Ammoniten der unteren 

 Wolga- Stufe. St. Pétersbourg. Mém. Com. Géol. vol. VIII, no. 2, p. 211, 

 453, tab. XII, fig. 1—3. 



A large Ammonite-fragment occurs in a block from Aucelia 

 River in the south-west of Jameson's Land. This fragment 

 consists of a cast of the inner whorls of some species of 

 Perisphinctes. The blocii was found below the place where the 

 Aucella-sandstone crops out and is of very similar material. 

 The specimen is unfortunately crushed and in a poor state of 

 preservation. There is no trace of the suture-lines and the 

 species cannot possible be determined with any certainty. It 

 resembles the specimen figured by Michalski on pi. XII, fig. 1 

 not only in the width of the umbilicus and in the sculpturing 

 of the surface , but also in the manner in which the inner 

 whorls are embraced by the outer. The somewhat coarse ribs 

 divide usually into two branches, very rarefy into three. The 

 points of bifurcation, in the case of the outer whorls, he 

 somewhat below the line of contact with the next whorl and 

 are consequently visible on these whorls. 



Perisphinctes Panderi is quoted by Michalski as occurring 

 very frequently in the deposits referred to the Virgatus-zone in 

 the immediate neigbourhood of Moscow. 



Olcostephanus. Nedmayr. 

 Olcostephanus (? Simbirskites, Pavlow and Lamplugh.) nov. sp. 



PI. X, fig. 2. 

 Some Ammonite-fragments were collected by 0. Noedenskjöld 

 on the •5*'' and 6'^ of August 1900, from fossil-locality 2 on 



13* 



