GEOLOGICAL SURVEY OF THE TERRITOEIES. 547 



The hvmcrns lias a round head, directed backwards and a little out- 

 ^vards. The tuberosities are rather small, of about equal size, and obtuse ; 

 they inclose a short bicipital groove. The bicipital crests are very 

 largely developed, and extend to the middle of the shaft, inclosing an 

 open groove between them. The external is narrow and most elevated, 

 the internal more obtuse and directed inward. The shaft is thus snb- 

 triangnlar in section. The distal extremity is nearly at right angles to 

 the axis of the proximal, and is much expanded transver.sely. A large 

 part of this expansion is caused by the truncate internal tuberosity, and 

 by the less prominent external one. The latter is continued in a thin 

 aia, which only sinks into the shaft at its middle. The condyles are 

 small, the external the most prominent. There is a shallow olecranar 

 fossa, and no coronoid, and hence no supracondylar foramen. There is 

 an arterial foramen above the internal tuberosity. 



The tdna is compressed, and contracts rapidly to the extremity. The 

 olecranon is broad and obtuse, and the humeral cotylus oblique to the 

 long axis. The coronoid process is low. The shaft is remarkably 

 curved from right to left, inward. The.radius has a discoidal head, with 

 central depression, and it was evidently capable of comi)lete rotation. 

 It exhibits a tuberosity and slight flexure below the head. The distal 

 extremity has a horizontal triangular section, with the apex internal and 

 truncate ; the shaft near it is quite flat. 



The left iJium is obspatulate and flat, widest at the convex crest, and 

 slightly concave on the outer side. It is rather thin, and the impres- 

 sion for the sacral diapophyses is elongated. The inferior border thick- 

 ens gradually to the acetabulum; the superior is excised so as to form 

 an open concavity. 



The right femur is remarkable for its length. Its shaft is flattened 

 from before backward, and without flexure. The great trochanter is 

 large, and embraces a deep inlooking fossa. There is a flat tuberosity 

 looking outward just below, and the little trochanter is a little below 

 opposite to it. The condyles are sub-similar in size, the trochlear sur- 

 face wide, but not flat, and the inner border thickenetl and considerably 

 elevated. The femur is 1.75 times as long as the humerus,* it was 

 scarcely longer, though a small piece is wanting from the shaft of our 

 specimen. 



Eemarls. — Having described the more important parts of the sketeton 

 preserved, I now proceed to consider its systematic position, and the 

 order to which it should be referred. 



The first impression derived from the appearance of the lower jaw and 

 dentition, and from the humerus, is that of an ally of the coati, Nasua. 

 The humerus, indeed, is almost a fac simile of that of Nasua, the only 

 difference being a slight outward direction of the axis of the head. The 

 some bone resembles also that of many marsupials, but the flat ilium, 

 elevated position of dental foramen, and absence of much inflection of 

 the angle of the lower jaw, &c., render aflinity with that group highly 

 improbable. The length of the fenuir indicates that the knee was en- 

 tirely free from the body, as in the qnadrumaua, constituting a marked 

 distinction from anything known in the Oarnirora, including Nasua. 

 The round head of the radius iiulicates a complete powei' of supination 

 of the fore foot, And is different in form from that of Carnii'ora, includ- 

 ing Nasua ; and, finally, the distal end of the radius is still more different 

 from that oi Kasua^ and resembles closely that of iSe^nnopithecus. 



We have, then, an animal with a long thigh free from the body, a fore- 

 foot capable of complete pronation and supination, and a form of lower 

 jaw and teeth quite similar to that of the lower monkeys. The form of 



