Tin: KATKACIIIA Ol" NOKTIl AMKUICA. 65 



I'rtipoilioiial dimeiiHions, 



Miizxle to Kiilar foltl: Times. 



In tlistiiiici" IVom snout Id ;{riiin , ;\,\i 



In distuiici' to I'nil ol" vnit (iiciirly) <1,'«J 



Foro-iirm iiml ('m't : 



In (list unci' tit ;;r()iii ;{. i; 



In ili^liinci' to t'Mil ol" vent .1.7 



LowtT li'y; lUid font : 



In (list II HIT to ^jidin H 



In (liNtiMiri- to I'hil of vent 4 



Width ofli.ad: 



lu tlistaiii'f to groin 3. G 



' 



Fin. II A iiilihintiimn ininitniiin Iliiy. iiiitinnl wi/r ; i'ii)iiiil frinii Hay. 



Tlii^ coloi' is (liiik itrowii, almost liliicU, iiliovc, biowiii.sli vcllow below 

 JJet\v«'«'H tilt' lort' and liiii<l ii'^s the ijolit color ol ilu' In ilv iiioiint.s up 

 on tin' .><i<l('.s to a level wilii the npiier snrlace.s ol the I nih.s. The inid- 

 <lle of the Itellv i.s of a (hi.skiei' line than hs side.s. I'cctoial, iiio'iinal, 

 ami |nil)i(! leijion.s .sjjirlitly hiighter yellow tinin the sides of the Itelly. 

 Head aliove Hive the hack, l»eio\\ like the other lowei paits. .Inst 

 hehiinl the symphysis of the lowei' Jaw ate iiidieations of a l»ri<iht yel- 

 low s|)ot. The uitper halfof the tail is not sodark as the back, the lower 

 half diiskief than the lielly. The liiid>s below and in front yellowish, us 

 other lower parts. I-Vet, especially alxtve, dark. 



This spe(!ies must be compared with .1. birolonuu} A. tinrhiuni. The 

 last belon;fs to the j^ronp wiii(;li has twelve costal ;j[rooves. .1. t'KjrUium 

 lias the interni nares no more widely separated than are the outer; the 

 limbs of the vomerine V are decidedly concave, and the inner series of 

 teotli are about twice the lenjitli of tlie outer. It is also a rather loujf. 

 bodied species, the distance from the snout to the axilla being' contained 

 in the distance from the snout to thej;roin nearly L'.t times, while in vl. 

 I'opt'KHKin the latter distamu? is but twice the former. Iiuleed, this form 

 dillers from all others, in the shortness of the body, or the equality of 

 the distances from snout to axilla and from axilla to j;-roiii. .1. bicolor 

 ai)proaches it most nearly, but this s|>e(ties dill'ers further in havinj; no 

 traces of the yellow spots so chara(!teristi(! of that form. .■I. copcanum 

 has also a broader and more depressed head, ii more compressed tail, 

 and lonp'r limbs. 



A. bicolor is described as having the palatine teeth in three entirely 

 transverse series; as having a Vi'iy short muzzle, and as beiii},' more or 

 less spotted. A t'omparison of some of the dimensions of the two spe- 

 lySl— Bull U 5 



N '■! 



i 



