pallidioribus, ud apicem albis ; codario mollissimo, brunni-plumbeo ; 

 caudd an/iulatim squamatct, raris brevibus et rigidioribus setis 

 obsitd; auribus tnediocribus, rotundatis. 

 Hab. va. campis Australiasianis inter fluvios Murray et Glenelg. 

 The skull resembles the typical Rats. The cutting teeth are )'ellow, 

 moderate, slightly rounded in front, without any regular groove. 

 The grinders are į, vvorn ; the anterior upper oblong, formed of three 

 transverse folds, the hinder being smallest ; the second tooth is nearly 

 circular, formed of two folds, the front fold largest, and having a 

 notch on its inner side ; the third tooth small, half ovate, with two 

 notches on the inner side. The anterior lower grinder is formed of 

 three, and the others of two folds ; the anterior fold of the lašt tooth 

 having a slight notch on the inside, and the posterior fold being 

 smaller than the ręst. 



in. lin. 



Length of skull 1 9 



tooth-line O 4 



Totai length 7 6 



Tail 4 6 



This rat has the dentition and somewhat the genereil appearance 

 of Mus fuscipes, Waterh., but the skull and animal are considerably 

 larger, and the fur is very much longer and paler. 



The specimens from which this deseription is taken were sent to 

 the British Museum by His Excellency Capt. Grey, Governor of New 

 Zealand. 



3. On two new Genera of Certhin^. By G. R. Gray, Esq., 

 F.L.S. &c. 



1 beg to lay before the Meeting the following deseription of \vhat 

 I believe to be a new genus belonging to the subfaraily Certhina, 

 under the name of Caulodromus. 



Rostrum capite longius, latum, basi subdepressum, gracile, per totam 

 longitudinem curvatum, lateribus a naribus usque ad apicem ob- 

 tusum subemarginatum fortiter compressis. Gonys longus cur- 

 vatus. Nares laterales, anterivis in sulco brevi lato siti, aperturd 

 magnž. rotundata nuda. Alce breves, basin caudse operientes, for- 

 titer rotundatse, remige sexta omnium longissima. Cauda brevis- 

 sima, rectricum apicibus subacutis. Tarsi digito medio breviores, 

 anticė sąuamis latis transversis muniti. Digiti longi, graciles, 

 extimo quam intimo longiore basi coadunato, intimo basi vix 

 coadunato; postico longo, ungue longo curvato armato. 



Caulodromus Gracei. Caul. riifescens, plumarmn icapis strigd 

 rufo-albidd notatis, pogoniis interioribus in dorso nuchdque nigris ; 

 tectricibus caudcB superioribus inferioribusgue Icste ru^s, alis cau- 

 ddque saturate brunneis strigis duabus nigris alterd (1 ridu alterd- 

 que {breviusculd) H rostri basi ductis, guld pectore abdomineque 

 medio rufescenti-albis rufo-brunneo variegatis. 



Rufous brown, streaked narrowly down the shaft of each feather 

 ■with rufous white ; the inner web of the feathers of the back of neck 



