Mammals from North Queen si and. 171 



2. Hydromys hnymani, sp. u. 



S . ^l; ? . 55, 115. Dinner Creek, Ravenshoc. 2900'. 



c^. 172, 178, 179; ? . 183. Vine Creek. 3000'. 



Smaller and darker than H. chrysoyaster, with the feet not 

 hecominj:: so s[)ccialiy eh)n<^ated in later life. 



(Coloration, as compared with H. chrysogaster reginre, the 

 water-rat of the sonthern part of Nortli Queensland, 

 decidedly darker above, the whole back ])ractically of the 

 same blackish tone as the crow^n of rei/r/?^. Under surface 

 washed with ochraceous-buff, much richer than the creamy- 

 ])uff of regince. About one-quarter of the tail white. Hind 

 feet, even of old specimens, of more normal marine 

 proportions to tlie rest of the animal than is usual in 

 Hydromys, tlie length of the foot usually little excecdin<j^ 

 tliat of the skull. 



Skull averaging smaller than in chrysogaster, and showing 

 a little less of the usual aquatic modifications. Nasals 

 shorter. Anteorbital foramina less high; palatine foramina 

 usually shorter. IMolars markedly and uniformly smaller. 



Dimensions of the tvpe : — 



Head and body 270 mm. ; tail 247; hind foot 58; ear 20. 



Skull: greatest Jength 52; condylo-incisive length 49; 

 zygomatic breadth 27 ; nasals 17*5 ; mastoid breadth 20*5 ; 

 palatilar length 23'5 ; palatine foramina 5'8 ; upper molars 

 7-8. 



An older male skull measures approximately 53*5 mm. in 

 condylo-incisive length. 



Rah. as above. 



Type. Adult male. B.M. no. 22. 12. 18. 2. Original 

 number 172. Collected 17th June, 1922. 



This distinct species differs markedly from the various forms 

 of //. chrysogaster by the reduction of the special elongation 

 of the hind feet which usually occurs in later life, the feet of 

 the oldest specimens of longmani scarcely exceeding those 

 of younger adults. And the molars are decidedly smaller. 



I have much pleasure in naming it in honour of my friend 

 Mr. Heber Longman, the well-known Director of the 

 Queensland Museum, to whom the British Museum is 

 indebted iu various ways in connection with Mr. Sherrin's 

 collecting expedition. 



3. Uromys sherrini^ sp. n. 



c^ . 90; ? . 41, 70, 130. Dinner Creek, Ravenshoe. 2900'. 

 Externally almost precisely like U. macropus of Ca[)e 



