243 



hairs clothing the tail, brown, with numerous interspersed fine black 

 hairs ; under surface greyish-white, becoming much lighter and 

 forming a conspicuous patch immediately beneath the tail ; whiskers 

 black ; feet light brown ; base of the whole of the fur bluish-grey. 



Length from nose to base of tail .... 4 inches. 



of the tail '6\ ,, 



of the fore-arm f „ 



of the tarsus and toes f „ 



This animal is known to the Aborigines of Moore's River in 

 Western Australia by the name of Jilbeetch. 



On the part of Dr. Gray, Mr. Gould brought under the notice of the 

 Meeting a new and very distinct species of Hapalotis, which is nearly 

 allied to, but considerably exceeds in size, the Hapalotis melanura. 

 This animal was collected by Mr. Elsey in the interior of Australia 

 during the recent expedition from the north-west coast of Australia 

 to Moreton Bay. It is a harsh wiry-furred animal, and differs from 

 H. melanura not only in size, but in the apical half of the tail being 

 white. 



Hapalotis hemileucura. 



Head, all the upper surface, and flanks very light sandy-brown, 

 with numerous, but thinly placed, fine long black hairs ; under sur- 

 face buffy- white, with even lighter feet and fore-arms ; tail brown, 

 deepening into black about the middle, beyond which the apical 

 portion is white ; the white hairs being prolonged into a small tuft 

 at the tip. 



Length from nose to base of tail .... 8 inches. 



of the tail 6-| „ 



of the fore-arm li H 



of the tarsus and toes \\ „ 



2. Observations on the genus Furcella, Oken, a Con- 

 chifer without concha or normal valves, and on the 

 genera Teredo and Ch;ena. By John Edward Gray, 

 Ph.D., F.R.S., V.P.Z.S. etc. 



(Mollusca, PI. XXXIX.) 



The shelly tube of this animal has been described under several 

 names. Linnaeus considered it as a Serpula ; Pallas, Home, and 

 more recently Messrs. Adams have regarded it as a Teredo. Oken 

 (1815) considered it a genus under the name of Furcella, to which 

 the following names have been given: — Septaria, Lamk., Closso- 

 naria, Ferussac, Clausaria, Menke, Kuphus, Gray, altered to Kyphus 

 by Agassiz. 



There is no doubt that it is allied to Teredo, and it has been se- 

 parated from that genus by the oiler conchologists because the apex 



