EVOTOMYS 



627 



postero-external tubercle smaller than the others (about half as 

 large as postero-interual). Tail about half as long as head 

 and body or slightly more, its anuulatious ill defined and 

 completely concealed by the dense covering of hair ; pencil 

 well developed, usually about one-sixth as long as vertebne. 

 Mammaj : p2 — 2, i 2 — 2 = 8. 



C'o/o«r.— Upper parts brown with a decided reddish or 

 ochraceous suffusion, especially along back ; sides and rump 

 usually lighter than back, often with a tinge of grey, but never 

 forming a decided contrast as in Evotomj/s rufocanus ; under- 

 parts light grey with or without a yellowish brown wash ; feet 

 greyish ; tail obscurely bicolor. 



SJiull. — The skull of Evotonij/s glareolm is small and lightly 

 built, the surface smooth and rounded, without noticeable ridges 

 or depressions for muscular attachment. Dorsal profile in 

 general slightly convex throughout, 

 though flattened or even a little con- 

 cave in interorbital region, the nasals 

 sloping I'ather abruptly forward, their 

 surface nearly flat ; there is usually 

 no sharp distinction between dorsal 

 and posterior outlines, the profile 

 merely bending abruptly downward 

 jiosteriorly over somewhat obliquely 

 truncate occipital region ; ventral 

 protile shallow-concave anteriorly, then 

 essentially straight to lower surface of 

 bulla ; depth of skull considerably 

 greater posteriorly than anteriorly, so 

 that the general outline formed by 

 the two profiles is distinctly wedge- 

 shaped. Brain-case sub-circular or 

 very broadly oval in outline when viewed from above, sometimes 

 a little squared at sides or in front ; the surface smooth except 

 for the small but evident postorbital processes, a distinct trace 

 of the lambdoid crest extending downward from outer extremity 

 of interparietal to meatus, and a shorter but more noticeable 

 vertical ridge along upper part of suture betw^een occipital and 

 petrous portion of temporal, this ridge lying when skull is 

 viewed from above in axis of concavity between paroccipital 

 process and occipital condyle ; in old individuals there is also a 

 slightly indicated angularity extending along sides of brain-case 

 and across median lambdoid region ; interparietal convex behind, 

 double concave in front, its lateral extremities acute or slightly 

 truncate, its greatest antero posterior diameter about one-half to 

 one-third transverse diameter ; occiput when viewed from behind 

 broadly arched, slightly flattened above and at sides, the median 

 portion of brain-case not rising conspicuously above lambdoid 

 level ; paroccipital processes slender but well developed, free 



Fig. 124. 

 Evotomys glareolus. 



Nat. size. 



