PROCEEDINGS OF THE NATIONAL MUSEUM. 



101 



extremities. Claws of the first aud fifth toes much shorter. First toe 

 placed farther back than the others, so that its claw does not reac-h to 

 tbe base of the second toe. Claw of fifth toe reaches to the l)ase of the 

 fourth toe. 



Tail a little more than twice as long as the hin<l foot (witli the claw); 

 terete, constricted at the base, covered with 

 about 63 rows of scales and with long hairs 

 which do not conceal the scales. 



Fur all of one kind, consisting of long hairs 

 of different diameters, which are dull and ir- 

 regularly crenulate below, with long shining 

 tips. Color dusky brown throughout, with 

 hoary and purple reflections. The hairs of 

 the feet and tail are dusky like the fur of the 

 body. Young apparently paler and browner. 



SKULL. 



Skull conical and depressed, smooth and 

 without prominent crests or ridges. Rostrum 

 moderately elongated, flattened superiorly. 

 Nasals eniarginate in front and nuich shorter 

 than the intermaxilla'. Zygomatic arches short, slender, slightly con- 

 vex upward and inserted high up posteriorly. Infraorbital foramen 

 large, having the nunute lachrymal foramen above its anterior margin. 

 Nasals short and broad, with moderate sinuses. Pa- 

 rietals irregularly pentagonal, the longest side in the 

 median line. ()cci])ital large and broad with two large 

 lobes which reach forward to join the eniarginate pos- 

 terior border of the parietals. Scpianiosals low, and 

 very irregular in form, with a broad quadrate portion 

 above the tympanic bulhe. Foramen magnum large, 

 oval. Tympanic bulhe, annular, broadest antero-inter- 

 ually. Palate concave with an eniarginate posterior 

 border opposite- the last molar. Horizontal ramus of 

 mandible nearly straight, slender. Coronoid process 

 large, high, and strongly hooked. Angle similar in form, 

 but smaller. 



TEETH. 



HIND FOOT OF NEUROTHK'HnS 

 GinBSII. 



isr. 4:;, Lower surface. Fi^'. 44, rp|>.-i-.-;iirl;ic. 

 (Twice natural sizi'.) 



Wit 



TAIL OF NEL'ROTRI 

 CHUSGIBBSII. 



( Natural size. ) 



I, 



pm, f;m,ij; total, 30. First upper incisors 



orbicular, much larger than the second and third. Tlie 

 latter subequal and smaller than the canine, which is two rooted and 

 triangular, with a slight posterior accessory cusp. First premolar one- 

 third smaller than and of like form with the canine; much smaller than 

 the second premolar. The latter is a large triangular tooth with a 

 prominent internal basal tubercle or heel. Molars of normal form; 

 the internal basal cusp of the first and second bilobed. 



