11. PHAIAWOEE. 199 



even pure white. Females from the island of "Wai-giu, and those 

 alone, are exactly like the strongly spotted and generally semi- 

 erythristic males found in the same island *. 



The males, by a striking but essentially simple combination of 

 white spotting with erythrism, have developed the remarkable 

 series of colour-variations characteristic of the species. The most 

 simple form is that where the male is almost exactly like the 

 ordinary grey female, except that it has a few inconspicuous wtite 

 spots on the back and sides. These spots may then gradually 

 increase in extent until the animal is nearly wholly white with a 

 few small dark spots upon it. Again, by a greater or leas degree of 

 erythrism, the head alone, the margins of the ears, the feet, the 

 forequarters, or, finally, the whole of the darker-marked parts of 

 the animal, may be deep rufous, the usually white parts either 

 remaining pure white or being also slightly tinged with rufous. 



Skull large, stout, and heavy. Muzzle broad and stout. Nasals 

 slightly projecting anteriorly, with a shallow but well-marked nasal 

 notch ; much expanded behind, their combined posterior edges 

 running backwards in the centre and forming a sharp point between 

 the orbits. Interorbital region narrow in proportion to the size of 

 the skull, very prominently convex upwards, the convexity increasing 

 with the age of the individual, its edges smoothly rounded, not 

 ridged, except posteriorly in old specimens ; no trace of postorbital 

 processes. Anterior palatine foramina; extending backwards beyond 

 the level of the back of the canines. 



Teeth. Upper i.' and i.^ about eq.ual in transverse section, the 

 former about twice as long vertically as the latter ; i.' about equal 

 to i.^ vertically, but far smaller in section, crushed in between the 

 latter and the canine, and often altogether absent. Canine large 

 and strong, pressed closely against the posterior incisor, and situated 

 so that the premaxillo-maxillary suture descends at about its centre. 

 P.' long, conical, single-rooted, about as high vertically as p.* ; p.^ 

 generally absent, if present quite minute ; p.* very large and broad, 

 with a prominent grooved ridge running obliquely along it. Molars 

 stout and heavy, the three anterior varying in length from 18"5 to 

 23 millim. Lower intermediate teeth usually only two in number 

 (i.'' and p.') ; p.* and molars large and stout, as in the upper jaw. 



Dimensions. 



j (stuffed). b (stuffed). 



Adult. Adult, 



millim. millim. 



Head and body 620 650 



Tail 480 (c.) 470 



Lower leg 127 (c.) 128 



Hind foot 71 70 



Ear 13 12 



Skull, see p. 208. 



* This most remarkable characteristic of the Wai-giu females was first 

 noticed and described by Dr. Jen link in the monograph above referred to. 



