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by Kutorga iu 1838 as exclusively mammalian. Huxley 

 first described it as extending to the reptilian class, 

 calling it a «supra-condyloid foramen». *) Owen in 

 1876 **) definitively determined its homology. In repti- 

 les it has only been found in genera of Permian or 

 Triassic age. In mammals it has been observed in От- 



nithorhynchus, Echnida, 

 Arctomys, Helamys, Sci- 

 urus maximus and S. 

 cinereus, Talpa Euro- 

 paea, all the Armadillos, 

 Manis, OrycteropuSjMyr- 

 mecophaga, Bradypus 

 (Choloepus) didactylus, 

 Phoca, Ursus ornatus, 

 all subursines, Procyon, 

 Cercoleptes , Batellus 

 mellivorus, Mydaus,Man- 

 gusta, Chiromys, Licha- 

 notus, Stenops gracilis, 

 Lemur catta and Calli- 

 thrix sciureus. Besides 

 these, the Glutton, Ot- 

 ter and all felines pos- 

 sess it. It is doubtful, 

 whether it ever occurs 

 in the human subject, 

 but it exists abnormally 

 in a few of the humeri 

 Fig. 1. of fossil bears. This ul- 



nar supracondyloid foramen (entepicondylar of Owen) is 



cc 



*} On vertebrate fossils from the Panchet Rocks. 1865. 

 **) Quart. Journ. Geolog. Soc cit. supra. 



10. 



