D>'. F. A. JENTINK. MAMMALS. 



Some measurements of the adult females, in millimeters : 



N°. 13 N°. 139 



forearm 151.. 143 



thumb with claw 59 . . 55 



second finger 90 . . 83 



third finger . . 92 (89) -f 72 (65) + 99 (89) = 263 . . 243 



fourth finger . . 85 (79) -[-62 (5 6) — |— 61 (59)= 208 . . 194 



fifth finger . . S6 (83) + 48 ( 4S ) -f- 51 (50) = 185 . . 178 



tibia 67 . . 63 



foot 40 . . 35 



calcaneum 16 . . 15 



The palate-ridges hitherto never having been figured, so I give them (fig. 2), as they 

 show such very distinct and striking patterns. 



3. Carponycteris nana Matschie. 



Adult female (in alcohol), Noord River, September 13. 1907; presented by Mr. J. H. 

 HONDIUS VAN HERWERDEN to Dr. LORENTZ. 



Adult maie (in alcohol), October 3. 1907. 



The maie is somewhat darker coloured than the female and also somewhat smaller in 

 ail proportions - f. i. forearm 9 39> forearm çf 38 mM. 



Palate-ridges (fig. 3) seven in number. 



RODENTIA. 

 4. Hydromys esox Thomas. 



A large rat floating in the river near Sabang was picked up by Mr. LORENTZ on 

 Juli 18. 1907. It is a male-specimen of the beautiful water-rat, so appropriately called esox 

 by Oldfield THOMAS, after a maie, captured near Port Moresby (Annals and Magazine 

 of Xat. Hist. 1906, Ser. 7, Vol. XVII, p. 324). Our spécimen is a trifle larger in ail its 

 dimensions than the type, for the rest I fail to detect any différence. About three fifths of 

 the tail is black, about two fifths white ; the tail ends in a bare tip hidden by the elongated 

 white hairs; the tail is throughout its whole length circle-round on cross-section, at its basai 

 parts its circumference measures 43 mm. 



Some measurements of the animal, in the flesh : 



length of head and body . . . 

 „ tail 



„ „ hindfoot with nail . . 



„ » ear 



ear to eye 



eye to tip of nose 26 „ 



longest whisker 80 „ 



Palate-ridges and skull figured on Plate I, figs. 4, 5 and 6. 



300 



mn 



250 



» 



60 



j? 



i7- 



» 



19 



» 



The skeleton présents the following number of vertebrae : cerv. 7, thorac. 14, with 14 



