The total length of the skeleton is 114 " " " skull 16 Between the outer edges of the posterior ends of the quadrate bones 8-3/4 From the snout to the middle of the canine notch 2-3/4 Transverse diameter of snout opposite 10th tooth 4-7/8 Long axis of orbit 2-1/4 Short axis of orbit 1-5/8 Interorbital space opposite the middle of the orbit 1-3/4 Anterior edge of the orbit from end of snout 10-1/2 Syncipital[3] area in length, about 2-1/2 " " in breadth anteriorly 3-3/4 " " " posteriorly 4 Supra-temporal fossæ, wide 7/8 " " long 1-1/8 Least width of parietal 7/16 Total length of mandible 20-1/2 Its greatest depth 3 Length of cervical region (or anterior 8 vertebræ) 10-1/2 " dorso-lumbar region 27 " sacral " 3-3/4 Length of humerus 7-1/2 " ulna 5-1/4 " fore foot, extreme length 6 " femur 8-1/2 " tibia 6 " hind foot, extreme length 9-1/4 From the above measurements it will be seen that the skull is somewhat slender. Behind the canine groove it widens to the tenth tooth, which is 5-3/4 inches behind the end of the snout. It retains about the same diameter to the twelfth tooth, and then slowly widens again,--a sudden increase in size, to the extent of half-an-inch, taking place opposite the posterior margin of the orbit, owing to the flanging-out of the jugal. On the whole, however, there is a slow and even increase in breadth, from the canine groove to the ends of the ossa quadrata. The nasal aperture is pyriform, its wider end being forwards, and its narrow posterior extremity, into which the pointed ends of the nasal bones project, attaining the level of the first tooth behind the canine groove. [3] By this term I denote that squarish flat area bounded by the postfrontal and squamosal bones laterally, by the occiput posteriorly, and by a line joining the outer angles of the postfrontals anteriorly.