Muvivtals from the Australian J'f/uin. .''25 



Key Islands, but afterwards staled to occur in New Guinea. 

 Its colour, however, is said to be suffused with ochraceoua 

 above ami below, while there is none of this colour in //. eso.v. 

 Its tail also is only black for one third its length, while in 

 //. esox considerably more than halt' is black. 



LiMNOMYS, gen. nov. 



Closely allied to llydromys, but less strongly specialized 

 for aquatic life. 



Fur coarse and harsh, not straight and glossy as in 

 Hydromys^ or at least only slightly so on the belly. ^luzzle, 

 Avhiskers, and ears as in Ihjdromys. Feet intermediate in 

 character, nearly normal in general sha])e, not strongly twisted 

 as in Uydromys ; hallux and last hind toe with practically no 

 webbing at their bases; webbing between second and third 

 and third and fourth toes narrow, not reaching halfway along 

 the toes; tilth hind toe, without claw, reaching nearly to the 

 end of the basal jjhalanx of the fourth ; surface of soles 

 nearly normal, smooth or very slightly granulated, the pads 

 distinct, their size and ])ositiou nearly as in Uydromys, but 

 more distinct, owing to the smoother general surface. Tail 

 long, heavily clothed as in Ilydromys, but the end with a 

 distinct brush of haiis, some of which attain an inch in 

 length. 



Skull, as compared with that of llydromys^ curiously short 

 and " stumpy, ^^ the brain-case short and broad, its breadth 

 greater than its length from the hinder edge of the inter- 

 }>ari<.tal to the interten poral constriction ; muzzle broad, 

 conical, its middle region increased in breadth owing to the 

 inflation of the lateral capsules over the roots of the incisors; 

 nasals less extended forwards than in IJydroniys and more 

 backwards, much broader behind than the narrow frontal 

 premaxillary jjroccsses. Anteorbital foramina very large, 

 tquallj wide above and below. Palatal foramina peculiarly 

 fcliort, )>ractically wholly in the premaxilla^, a small process 

 ot the maxillaj only just bordering their posterior end. Sides 

 (f mesopterygoid Ibssa more rounded, less sharply edged 

 than in IlydiomySy this being apparently due to a reduction 

 in the iieight of the entopterygoids, while the ectopterygoids 

 are practically obsolete. But the pterygoid region is ini- 

 j.erfect in the typical skull, so that it camiot be exactly 

 described, liullie as iti JJydromys. 



Incisors feebler in every way than in llydromys^ shorter, 

 narrower, shallower in antero-postcrior section, the uj)per ones 

 set at a greater angle to each other owing to the increased 



