120 POMPECKJ. JURASSIC FAUNA OF CAPE FLORA. [norw. pol. exp. 



Quenstedtoceras vertumnmn Sintzow belongs to the group of Quenstedt- 

 oceras Mologce and RyUnshianum. Wherever this group occurs, it never 

 appears earlier than in the Upper Callovian, as in Russia in the Jura of the 

 Governments Rjasan, Twer, Jaroslaw, in the Lithuanian Jura, in Wiirttem- 

 bergi, and in France (Calvados) 2. 



Even though Quenstedtoceras vertummmi Sintzow is the only fossil 

 which is known to be of the age of the Upper Callovian, it is so charac- 

 teristic that it proves without doubt the presence of this zone, i. e. 



the strata with Quenstedtoceras Lamberti of the Russian geologists, 



the zone of Peltoceras athleta of the German and French geologists, 

 in the Jura of the Cape Flora region. 



Besides the above-mentioned fossils, the fragment of a stem of a Penta- 

 crinus sp. ex. aff. hajociensis P. de Lor, discussed on p. 54 (PI. I, fig. 1) 

 was found on July 12th, immediately at the margin of the glacier at a 



' Amm. Lainierti inflatus Quenst. 'Ammoniten' PI. 90, fig. 16 from the "Lamherti Knol- 

 lenschicht", and Lamberti piiiguis, PI. 90, fig, 22 from the Upper "Ornaten-Thon" of 

 Beuren belong to this group. 



' Quenstedtoceras appears nowhere earher than in the zone of Peltoceras athleta 

 This can, of course, only be proved where a faunistic stratigraphic-separation between 

 the zones of Beineckia anceps and Peltoceras athleta, with their respective equiva- 

 lents, is possible, i. e. in most of the Jura districts of central and northern Russia, 

 in Hanover, Wfirttemberg and France. The Savoy and England are apparently excep- 

 tions to this rule. 



Parona and Bonarelli (Sur la faune du Callovien inferieur de Savoie. M6m. de 

 I'acad. de Savoie vol. VI, 1895, p. 93. PI. II, fig. 4) record a Quenst. priwtigenmm 

 n. sp. from Savoy, from the Lower Callovian fChanazien^. I cannot regard this form 

 as a Quenstedtoceras; judging from its shape, involution and sculpturing (the lobe- 

 line is not known), it is rather a Gardioceras and allied to Cardioceras Chamussetti 

 d'Orb. sp. 



From Yorkshire in England, Quenstedtocerates are mentioned both from the Kella- 

 ways Rock and from the Oxford Clay. To some extent, the determinations of some 

 forms, e. g. Quenstedtoceras Marice d'Orb. sp. from Wiltshire, are incorrect. These are 

 simply young Cadoceras suhlwve Sow. sp. To some extent the occurrence of Quen- 

 stedtoceras in the Kellaways Rock, partly coinciding with the Macrocephalus zone, 

 together with the other Ammonites (viz. Peltoc&ras athleta Phill. sp., arduennense 

 d'Orb. sp. Aspidoceras perarmatmm Sow. sp., Cosmoceras Jason Rein, sp., GuUelmi 

 Sow. sp., Hecticoceras lunula Rein. sp„ Oppelia Beaugieri d'Orb. sp. Oekotraustes 

 crenatus Brug., sp., Cardioceras excavatum Sow. sp., Quenstedtoceras Lamberti 

 Sow. sp., flexdcostatum Phill. sp., Marice d'Orb. sp. etc , c£ 'The Jurassic Rocks of 

 Britain.' vol. II, p. 236, etc., vol. V, p. 359, etc.) proves that the Kellaways Rock of 

 the English geologists is not really everywhere, and especially not in Yorkshire, 

 Lower Callovian, and Oxford Clay Upper Callovian. The Kellaways Rock and the 

 Oxford Clay may be petrographically different facies of faunistically corresponding 

 strata, and in both the Kellaways Rock (especially that of Yorkshire) and the Oxford 

 Clay, the different zones of the Callovian, as they may be observed on the continent, 

 cannot be separated. 



