590 PEOF. H. G. SEELEY ON THE 



is a corresponding elongation of the phalanges of the digits, so that 

 curves might be drawn through the articular ends of the bones 

 which would diverge as they extend outward and forward. The 

 first digit is the shortest and strongest ; the two outer digits appear 

 to be slightly the more slender. All the metatarsals and phalangeal 

 bones are more or less contracted in the shaft and expanded at the 

 ends, and the digits terminate in conical claws. 



The first digit measures 1*7 centimetre in length, of which the 

 metatarsal forms one centimetre ; it is a stout bone with the ex- 

 tremities fully 4 millimetres wide. The first phalange is less than 

 4 millimetres long and the conical claw-phalange 3 millimetres long. 

 The interspaces between the bones are small, showing that their 

 extremities were well ossified. 



The second digit is 2*6 centimetres long. The metatarsal bone 

 measures 14 millimetres. The first phalange is 5 millimetres long, 

 the second scarcely 4 mm., and the third 2 mm. 



The third digit has a length of S'2 centimetres. The metatarsal 

 bone is 1 5 millimetres long. The first phalange is 7 mm., the second 

 4 mm., the third 3 mm., and the fourth 2 mm. 



The fourth digit has a length of 4-8 centimetres. The metatarsal 

 bone has a length of 1*7 centimetre. The first phalange measures 

 8 millimetres, the second 5 mm., the third 4 mm., the fourth 3 mm., 

 and the fifth phalange has a length of 1 millimetre. 



The fifth digit has a length of 4-1 centimetres. The metatarsal 

 bone is 2 centimetres long. The first phalange is nearly 11 milli- 

 metres, the second fully 5 mm., the third 3 mm., and the fourth, 

 which is very small, is about 1 millimetre long. 



No. 4. — 49973, was found at the same time and place as the 

 specimen just described, and presented to the Eritish Museum by 

 the same gentleman. It may therefore be a portion of the same 

 individual. It is a similar slab in soft shale exhibiting some cha- 

 racters of the middle caudal region. It includes 18 vertebrae. In 

 the early vertebrae the length of a centrum is 9 millimetres, and as 

 the series measures 15*5 centimetres, it is manifest that the decrease 

 of the vertebrae in length, as they extend posteriorly, is slight. 

 The subquadrate vertebral bodies are flat at the side, with the cen- 

 trum scarcely defined from the neural arch, which contracts ante- 

 riorly and laterally, so as to form a sharp, strong, pointed neural 

 spine, which is directed upward and backward. In the later ver- 

 tebrae, the neural spine becomes at first more slender, and afterwards, 

 in the hindermost vertebrae preserved, it is more depressed. Chevron 

 bones are present in all the vertebrae which are sufiiciently well 

 preserved to show them. They appear to be attached in the usual 

 way at the posterior angles of the centrums, are more slender than 

 the neural spines, rather shorter, and directed backward at a 

 sharper angle. They are 9 mm. long, 2 mm. wide, and terminate 

 at first in a horizontally truncated surface, but afterwards they are 

 more compressed distally. (See fig. 1, p. 591.) 



This completes the evidence from the Kimberley specimens. It 

 is impossible to say that they belong to M. tenuidens. The well- 



