Dr. F. A. JENTINK. MAMMALS. J 



rative proportions of the named parts. Worse is that thèse measurements are not always 

 trustworthy, f. L, as I said above Mus exulans has a tail about as long as head and body, 

 that is accordingly the original describer of the species, Mr. PEALE; in the Memoir III of 

 the Australian Muséum, Sydney, 1897, there is another description of Mus exulans by Edgar 

 R. Waite (with figures of ear, hindfoot, skull and molars, 1. c, p. 175, plate VIII) and Waite 

 stated that the tail is longer than the head and body; the more Peale's exulans-îemale had 

 tzuo pectoral and four abdominal teats, whereas in Waite's spécimens the pectorals were four ! 

 Now it is. a lucky coïncidence that Trouessart gives no authority upon which is based the 

 présence of exulans in New Guinea, so that \ve safely may cast out this species ; but not 

 always it is possible to take such radical measures ! 



6. Mus terrae-reginae Alston. 



N°. 41. Adult female (in alcohol), Bivak Island, May 22. 1907, 



N°. 6j. Adult female (in alcohol), van Weel's Camp, June 18. 1907, 



N°. 82. Adult maie (in alcohol), van Weel's Camp, June 25. 1907, 



N°. 83. Adult female (in alcohol), van Weel's Camp, June 26. 1907, 



N°. 108. Young adult female (in alcohol), Alkmaar, August 2. 1907, 



N°. 113. Young adult female (dried skin, with skull), Alkmaar, August 9. 1907, 



N°. 122. Young adult maie (dried skin, with skull), Alkmaar, August 12. 1907, 



N°. 160. Adult female (in alcohol), Bivak Island, July 3. 1907. 



Mammae : 1 -f- 2 = 6. 



N°. 41 — 67 — 82 — ; 83 — 108 — 160 

 head and body. . . 205 215 237 235 180 240 mm. 



tail 175 15° I 7° T 72 135 l82 



ear 18 17 18.5 20 18 20 „ 



hindfoot 46 42 43 45 37 45 



Excluding the enormous Goliath '), this species is much larger than any described 

 New Guinea il/zw-species, with the tail shorter than head and body ; in colour also it is quite 

 distinct. Very typical is the tail, irregularly marked with yellowish patches and rings. 



Some measurements of skulls in mm. 



N°. 41 — 67 — 83 — 83 — 108 — 113 — 122 — 160 



basai length 42 42 44 47 35 39 39 47 



greatest breadth 21 22.5 22.5 25 19 — — 25 



nasals, length 17 18.5 19 20 14.5 16 16 20 



length of upper molar séries . . 8 8 7.5 8 7 8 8 8 



diastema 12 12.5 13 15 10 12 12 15 



Palate-ridges (ûg. 10) of n°. 160. - 



" 7. Mus ratticolor n. sp. 



X 3 . 84. Young adult female (in alcohol), van Weel's Camp, June 18. 1907. 



1) Mus barbatus is after Oldfield Thomas, who has examined the type, a member of the Wromys-group (AnD. 

 Mag. Nat. Hist. 1907, Ser. 7, Vol. XX, p. 73); it is a somewhat larger animal than terrae-reginae, moreover it prima 

 facie differs by having the fur "très doux"; see Milne-Edwards, Bull, du Mus. d'Hist. nat. 1900, p. 167. 



