4 THE VOYAGE OF H.M.S. CHALLENGER. 



the plane of section the animal measured along the curve of the back, from the muzzle to 

 the tip of the tail, 6 feet 2 inches, and to the most distal point of the hind limb, when it was 

 elongated behind the tail, 7 feet 2 inches. The free part of the tail was only 2f inches long, 

 the girth immediately behind the pectoral limb was 3 feet 2 inches in the eviscerated carcase. 

 The other female, judging from the dimensions of the separated skin, had apparently been 

 somewhat bigger, as the length from muzzle to tip of hind limb was 7 feet 8 inches. 



Between thirty and forty black bristles arranged in six rows on each upper lip, pro- 

 jected for the most part backwards, and the more posterior bristles were longer than the 

 anterior. The lips overhung the mouth, the slit of which was 2f inches long on each side. 

 The nostrils opened forwards on the face, but there was no proboscis. Immediately 

 above these orifices were three transverse wrinkles in the skin, from the upper of which 

 a single black bristle projected at each end, and by the depression of these wrinkles, 

 through the contraction of the facial muscles, that peculiar appearance of the face is 

 produced, which, in the Narrative of the Voyage, the animal is stated to assume when 

 disturbed. The palpebral fissure was if inch wide, and seven black bristles projected 

 from the skin, a short distance above the inner end of each of these fissures. A large 

 extensde third eyelid was situated at the inner canthus, which could be drawn outwards 

 so as to cover the front of the globe. The orifice of the external meatus, so small as 

 only to admit a fine probe, was situated 2^ inches behind the external canthus. 



The pectoral limb was 1 2 inches long and 4 inches in greatest width ; five digits, each 

 with a long and strong convex nail on the dorsum, were individualised at the distal 

 border of the manus. A groove on the surface of the limb, between the pollex and index, 

 was short and shallow, but the surface grooves which differentiated the other digits 

 became deeper and more elongated as one passed from the second to the fifth digit, and 

 possessed a narrow intermediate web. Both surfaces of the limb were covered with hair, 

 and the nails projected beyond the distal border of the limb. 



The left hind limb measured from the head of the thigh bone to the tip of the 

 innermost digit 25^ inches, and from the fold at the root of the tail to the tip of the 

 same digit 12^ inches ; but the corresponding measurements were not cpaite so long on 

 the right side. The pes was pentadactylous. The first and fifth toes were very 

 much longer and bigger than the three intermediate digits, so that the posterior free 

 border of the foot was deeply concave. A broad and deep web connected the toes 

 together, and only the tips of the three intermediate digits projected beyond the free 

 border of the web, but their outline was distinct on both the dorsal and plantar surfaces; 

 more especially on the latter. The web was longitudinally wrinkled, and permitted the 

 toes to be approximated or drawn widely asunder, so as to make the greatest width of 

 the foot 1 1 inches. Both the dorsal and plantar surfaces of the foot were haired up to 

 the free distal border of both web and toes, and no trace of nails was seen. 



The vent was elongated from before backwards, and was situated a little in front of 



