GEOLOGICAL SURVEY OF THE TERRITORIES. 547 



The humerus bas a round head, directed backwards and a little out- 

 wards. 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 sub- 

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

 the axis of the proximal, and is much expanded transversely. 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 

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

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

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

 an arterial foramen above the internal tuberosity. 



The ulna is co^opressed, 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 complete 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 ilium 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 acetabulnm ; 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 thickened 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. 



Remarlcs. — Having described the more important parts of the skeleton 

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

 order to which it skould 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 facsimile of that of ISfdsua, 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 affinity with that group higWy 

 improbable, The length of the femur indicates that the knee was en- 

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

 distinction from anything known in the Carnivora^ including Nasua. 

 The round head of the radius indicates a complete power of supination 

 of the fore foot, and is dilierent in form from that of Garnivora, includ- 

 ing Nasua ; and, finally, the distal end of the radius is still niore diiierent 

 from that of Nasua, and resembles closely that of ^emnopithecus. 



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

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

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



