132 Btdletin American Museum of Natural History. [Vol. XII, 



front, (11) condyles very wide, (12) coronoid process short and wide 

 with deep fossa. Skull (13) short and wide, (14) orbits placed as 

 far forward as in Procyon, (15) jugal process of squamosal not 

 reaching as far forward as postorbital process of malar. (16) Shape 

 and proportions of skull and jaws resemble those of Procyon lofor, 

 except that (17) the brain-case is much smaller proportionately. 

 (18) An alisphenoid canal as in Cynodictis. (19) A median and 

 two lateral foramina in palate between canines. (20) Palate not 

 extended posteriorly. (21) Base of skull much less broadened 

 than in Procyon, (22) paroccipital process not developed. 



Of the above Nos. i, 4, 5, 9, 10, 11, 12, 13, 14, 15, 16, and 19 

 are progressive characters in the direction of the Raccoons. Nos. 

 2, 3, 6, 7, 8, 17, 18, 20, 21, 22, are primitive characters, shared by 

 all early Canidse. 



Skeleton. — The hyoid bones were found perfectly preserved, 

 but offer few characters for distinction. 



The atlas is like that of Cynodictis ; the posterior opening of 

 the vertebral canal presents a little upward instead of directly 

 upward as in recent Canidae, or directly backward as in Procyon, 

 where the opening is bounded by a strong ridge passing outward 

 from the axial cotylus. 



Concerning the other vertebrae no exact account can be given 

 at present, as they are not yet removed from the matrix ; they 

 resemble in most respects those of Cynodictis. The ribs are 

 somewhat larger ; the dorso-lumbar formula is not yet known. 



Fore Limb. — The humerus is of the same length as in Procyon 

 lotor, but more slender throughout. The greater tuberosity is 

 higher and the deltoid crest is more marked and extends farther 

 down. The radius and ulna are 15 per cent, less in length and 

 of about the same diameter in the shaft. Shafts of both trihedral 

 or irregular in cross-section, instead of regularly oval as in modern 

 Raccoons. Carpus with co-ossified scapholunar, thin cuneiform, 

 large unciform, rather small magnum, rather large trapezoid, and 

 small trapezium. Five metacarpals, of which mc. i is only half 

 the length or diameter of in ; mc. v is three fourths as long, but 

 of considerably greater diameter than mc. in ; mc. 11 and iv 

 equal in diameter to, but a little shorter than, mc. in. 



Hind Limb. — T\-\q femur is of nearly the same length as that of 

 P. lotor, and one fifth slenderer. The shape resembles Cynodic- 



