114 POMPECKJ. JURASSIC FAUNA OF CAPE FLORA. [NORW. POL. EXP. 



Bdemniles m. f. suhextensm Nik. Panderi d'Orb. 



Among the fossils described by Newton from Elmwood, the following 

 species come from our locality, and out of clay-sandstone: 

 Cadoceras Tchefkini d'Orb. sp. 1 

 Nanseni n. sp. 2 

 sp. indet. 8 

 Pecten cf. detnissus E. T. Newton. 1. c. p. 498. 



From the considerable difference in height between the appearance of 

 clay-sandstone with numerous Lamellibranchs and the very numerous speci- 

 mens of Cadoceras Nanseni n. sp. above Elmwood at 550 ft., and the clay 

 at Windy Gully at height of about 400 ft. above the sea, containing Macro- 

 cephalites Kcettlitzi, pila, etc. - the representatives of the Lower Callovian 

 it may a priori be assumed that the two different rocks belong to diffe- 

 rent zones. This assumption is supported and ultimately proved by the fauna 

 of the clay-sandstone, which is wholly different from that of the clay at the 

 south-west end of Windy Gully. Instead of Macrocephalites, we here find 

 Cadoceras as the Ammonite of most common occurrence. This difference in 

 the fauna is here not the consequence of different facies, but the result of 

 temporal changes upon the fauna. 



The occurrence of Cadoceras Tchefkini d'Orb. sp., which, according to 

 Newton's description, is affirmed to be in this locality and in the clay-sand- 

 stones, is of great importance in determining the age of the clay-sandstones. 

 Cadoceras Tchefkini d'Orb. sp. in northern and central Russia 4 , together 

 with Cadoceras Milaschewici Nik., belongs to the very characteristic fossils 

 of the Middle Callovian, of the Zone of Cadoceras Milaschewici of Nikitin 

 = Zone of Reineckia anceps of Oppel. 



By means of Cadoceras Tchefkini d'Orb. sp., the Ammonites occurring 



together with it: 



Cadoceras Nanseni n. sp. 



1 = Amm. (Cadoceras) Tchefkini E. T. Newton, 1. c. PI. XXXIX, flg. 5. 



= Amm. (Macrocephalites) macrocephalus E. T. Newton I. c, PI. XXXIX, figs. 1, 2. 



+ Amm. (Cadoceras) Tchefkini? d'Orb. E T. Newton, 1. c. PI. XXXIX, f. fig. 6. 



8 = Amm. (Macrocephalites) macrocephalus (var.) E. T. Newton 1. c. PL XXXIX fig. 3 



* Petchora basin, Gov. Rjasan, Tambow, Twer, Jaroslaw, Kostroma, Samara and Orenburg. 



S. Nikitin (Quelques excursions dans les Musses et dans les terrains m^sozoiques 



de 1'Europe occidentale etc. Bull, de la Soc. Beige de G^ol. etc. vol. Ill, p. 34) also 



mentions Cadoceras Tchefkini d'Orb. sp. from the Callovian of England, and further 



as a rarity, from the Upper Callovian of the Upper Volga (M<Sm. de 1'acad. imp. d 



Sc. St. Petersburg, S. VII, T. XXVIII, N. 5, pp. 20, 21, 26). 



