124 Bulletin Aviericafi Museum of Natural History. [Vol. XII, 



Measurements of Cynodictis gregarius {Cope), in Comparison 

 with Canis zerda. 



Cy. gregarius. 

 Skull, length, premaxillas to condyles. . . est. 76 mm. 



length of palate (dentition) 



" breadth " " 



" " brain case 



Vertebra;, all pre-caudals 



cervicals 



dorsals 



lumbars 



sacrals 



caudals 



Fore limb, total length 



humerus 



radius 



foot 



carpus 



metacarpus 



phalanges est 



42 

 27 



2(3 



Hind 



limb, total length. 



femur 



tibia 



foot (astragalus to ungues). . 



tarsus 



metatarsus 



phalanges 



105 

 23 



180 



71 



56 



53 



6 



22 



■ 25 



241 



80 



81 



So 



19 



34 



27 



Taking the above measurements in order, we see that the skull 

 of Cynodictis is shorter and with smaller brain-cavity. The neck 

 and back vertebrae are nearly of the same size as in the Fennec, 

 but cannot be measured at present. The lumbars and sacrum 

 are considerably larger, and the tail was probably as long (no 

 other living Dog has a tail of this length). The fore limb is one 

 fourth shorter, while the hind limb is only one ninth shorter. 

 The greater part of the elongation has been in the lower limb and 

 foot bones. The phalanges have not lengthened at all, there be- 

 ing no tendency to become unguligrade. 



V. — The Ance.stry of Certain South American 



Foxes. 



Nothocyon, gen. nov. 



A genus or subgenus of Dogs distinguished by : 

 (i) Short muzzle ; (2) upper carnassial very small, trigon of 

 lower carnassial reduced, shear partly transverse ; (3) molars 



' Measurements taken from Mivart's Monograph of the Canidse. 



