192 



Group of MacrOCephalites macrOCephalus, Schlotheim sp. 

 Macrocejjhalites sp. cf. com'pressns. Quenstedt. 



1849. QuEN^STEDT, F. A. Cephalopoden. p. 182, tab. 15, fig. 1. 



?1868. StepJianoceras Canizarroi. Gemellaro, G. G. Studj paleontologici 



s. Fauna d. Cale, a Ter. Janitor, p. 4ô, tab. 9, fig. 9 — И. 

 1886—7. QüENSTEDT, F. А. Die Ammoniten des Schwäbischen Jura. vol. II. 



Der braune Jura. p. 651, tab. 76, fig. 14, 15. 



A fragment of an ammonite-cast, consisting of red-brown 

 limestone, found in a concretion in a very micaceous clay- 

 shale at Vardeklöft, seems to bear a 

 strong resemblance to the species 

 Macrocephalites compressus, Qdenstedt. 

 It has, however, a wider umbilicus and 



the ribs are further apart at the um- 

 Fig. 1. Suture-line of Ma- 

 crocephalites sp. cf. com- bilicus. On the other hand, the ribs di- 



pressus, QuENST. yide more than do those in Quenstedt's 



figures, consequently, on the external margin, they are quite 

 as near together as in those figures; also the ribs curve forward 

 more in the neighbourhood of the umbilicus, than do those in 

 the above-mentioned figures of Quenstedt. In the Palæontological 

 Collection at Munich, there is, however, a specimen of Macro- 

 cephalites compressus from Ützing in Franconia; in this the ribs 

 are closer together and seem to curve in the same way as 

 those of the Greenland specimen. The latter has, however, a 

 wider umbilicus than is seen in the Ulzing specimen. 



Macrocephalites compressus is quoted by Qdenstedt from 

 the «brown Jura s» (Lower Callovian) of Swabia and by Schlos- 

 ser Ч and PoMPECKj as occurring in the Macrocephalus-zone at 

 IVegensburg (Keilberg). Perhaps the same form is intended by 

 Gemellaro in his description of Stephanoceras Canizzaroi from 

 Sicily and by Bonarelli^) from Chanaz (Savoy). 



') Schlosser, M. 1901, p. 560. 



^) Paroxa, C. F. et BoNARELLi, G. 1895. Sur la Faune du Callovien in- 

 férieur de Savoi. p. 118. 



