324 PEor. E. coLLETT ON MAMMALS [Mar. 16, 



skin of a nearly adult male (from Gleucoe) was destroyed, and its 

 skull only preserved. 



The coloration of the young and the female agree in most 

 details with Thomas's description. The fingers and toes are, 

 however, yellowish white to the claws, and the tail, too, is rufous 

 white throughout, not becoming darker towards the tip. 



Skull. In the male the length is 174 mm., the breadth 103 mm. 

 The greatest breadth across the inflated nasal chamber is 49 mm. 

 The specimen is not perfectly adult ; the line between the 

 zygomatic processes will touch the anterior part of m*. The 

 skull of the young female has a length of 147 mm., breadth 

 87 mm. 



Male. — IWth. Persistent set not yet developed, the milk ^/ 

 being still present. It is short, with a weak root ; its length 

 scarcely exceeding the breadth of hi\ 



In the lower jaw m* is almost aborted on both sides, its premolar- 

 like crown being pressed obliquely in the space between (the 

 normal) mr and the milk p*. 



Female. — Teeth as in the male, but »u' in lower jaw is normal. 

 The milk^/ in both jaws very small and directed obliquely forwards. 



Ilab. Common in Arnhem Land in the neighbourhood of hills, 

 generally seen in herds. Also found on Victoria Eiver. It was 

 very wary and difficult to approach. 



Native name: Koppo(male); Kondaltburu (female). 



16. Maceopus agilis (Gould), 1841. 



Macropus agilis, Thos. Cat. Mars. Monotr. Brit. Mus. p. 42 

 (1888); Ogilby, Cat. Austral. Mamm. p. 54 (1892). 



N. Australia : Port Darwin, June 1894 (four specimens). Daly 

 Eiver, July-Aug. 1894 (four specimens and one embryo). Victoria 

 Eiver, April 1895 (one specimen). Katheriue Eiver, July 1895 

 (three specimens). 



N.W. Australia: Eoebuck Bay, Nov. 1895 (five specimens and 

 tliree embryos). 



Shin. There are in the collection 17 skins (mostly with skulls), 

 four embryos or young ones from pouch, and several skulls 



extra. 



Tounfj from pouch. Length from snout to anus about 150 mm., 



tail 97 mm. 



Eyes still closed. Naked ; hairs on snout just traceable. No 

 teetii visible. (Eoebuck Bay, Nov. 1895.) 



Another young one, length from snout to anus about 200 mm., 

 tail 148 min. (size of a squirrel). Still almost perfectly naked, 

 the eyelids and vibrissae developed. Lower iucisors visible. 

 (Eoebuck Bay, Nov. 1895.) 



Skull. 20 skulls, in different stages of development, are in the 

 collection (length between 68 mm. and 152 mm.). 



Teeth. I give some remarks on the teeth in a few of these 



stages. 



Yowuj stage (a specimen from the pouch). Length of the skull 



