166 REPORT OF NATIONAL. MUSEUM, 1898. 



closed with a straight suture at the fundus. There is a foramen on the 

 inner side of the splenial opposite the eighteenth tooth, counting from 

 the front. The angular extends farther forward than the suraugular, 

 and its narrow apical portion is on the inferior face of the ramus, ter- 

 minating at the eighteenth tooth. 



In young specimens the posterior alveoli are not sei)arated from each 

 other, and the crowns of the teeth are more compressed than in adults. 



The atlantal neural spine has no spinous process, but it is well devel- 

 oped on the other vertebr;e. The atlas sends posteriorly a slender rib, 

 which is slightly bifurcate proximally. The other cervical ribs send a 

 distal process forward as well as backward. The dorsal ribs have a 

 small cartilaginous uncinate process near their distal extremities. The 

 abdominal ribs consist of four ossicles, forming a chevron directed for- 

 ward. The interclavicle has no transverse branch, and extends well 

 in advance of the sternum and nearly to its posterior border. The 

 hnemal ribs unite with the sternum, as follows : Two pairs unite directly, 

 and four jiairs with a median xiphoid cartilage. 



The coracoid is an elongate element, distally truncate, without 

 notches or processses: the usual foramen pierces it near the base. The 

 scapula is of somewhat similar form; it has no pro- or nieso- scapular 

 process or angle. The humerus has one compressed tuberosity at a 

 considerable distance distad of the head. The distal extremity much 

 resembles that of the femur. The ulna is robust proximally, and the 

 olecranon is represented by a large sesamoid bone. The shaft of the 

 radius less compressed than that of the ulna, but is not very different 

 in actual sectional area. Its distal articular surface is a little larger 

 than that of the ulna, and is at nearly a right angle to it. In the 

 carpus the radiale is a much larger bone than the intermedium, but 

 both are similar in form, being much longer than wide, and having 

 expanded extremities and contracted shafts. Their distal articular 

 faces are concave. The ulnare projects freely backward. There is 

 but one carpale, and that corresponds with the third digit. The I and 

 II are represented by a cartilage. No centrals. Digits live, of which 

 the third is longest and the fifth shortest. The I, II, and III only 

 have the distal phalanges unguiform and sheathed with horny claws. 



The ilium jirojects as far as the diapophysis of the first caudal verte- 

 bra but does not fuse with it. The proximal end of the ischium is deeply 

 notched, which causes a perforation of the acetabulum. The femur 

 is longer than the humerus and the head is less compressed. There 

 is no distinction into the head and neck. There is but one trochanter 

 and that is on the posterior aspect and presents its tuberosity distad. 

 The condyle of the femur is not divided; no patella. The fibula is 

 much more slender than the tibia at all points. The astragalus articu- 

 lates with the fibula as well as with the tibia ; its face of articulation 

 with the calcaneum is excavated. The latter has a convex fibula sur- 

 face, while the tibial surface of the astragalus is concave. Posterior to 

 the fibular condyle the calcaneum is excavated, and the tuber calcanei is 



