1. CHAM.ELEON. 463 



Soutli-west Africa, from the mouth of the Orange River to Angola. 



a-b. 2 >fc hf^r. Moiitli of Orange River. Sir A. Smith [P.]. 

 c, d. Stuti'ed. Naniaqualaud. S. African .Mu.seuiu. (T3'pe3 



of C. tubercuUferm.) 



e. Several spec. : DamariUand. 



f. 2 . Mossamedes. Dr. Wehvitsch [P.]. 



g. h. $ . S. Africa. 



28. Chamaeleon bifidus. 



Chamajleo bifui'cus, Oni}/, Cat. p. 268. 

 Chamreleo bitidiis, Bruw/n. Bull. Sue. PhiUmi. ii. 1800, p. 00, pi. vi. 



tig. 2 ; Daud. liept. iv. p. 217, pi. Uv. ; Uuin. ^- Bibr. iii. p. 233, 



pi. x.xvii. tig. 3. 



bifurcus, Kuhl, Beit?-, Zuol. Vert/l. Anat. p. 103. 



ChamiBleon (Furcifer) brongniartii, Fitziiitj. Si/,st. Itept. p. 42. 

 Cliaiuiiileo balteatus, A. Ditm. Cat. Me/h. llr/)t. p. 32, and Arch. 



Mas. vi. p. 2(J0, pi. xxii. tig. 2 ; Grai/, Proc. Zuol, Sue, l8G4, p. 472. 

 Dicraaosaura bifurca, Gray, I. c. p. 478. 



Casque broad and rounded, and not much elevated posteriorly ; 

 no parietal crest ; the distance between the commissure of the 

 mouth and the extremity of the casque is a little less than the 

 length of the mouth ; lateral crest surrounding the casque pos- 

 teriorly, tubercular in the adult ; adult male with two long com- 

 pressed rostral processes or horns covered with scales, parallel or 

 very slightly diverging ; these processes short and cartilaginous in 

 the young male, absent in the female ; no trace whatever of occipital 

 lobes. Body covered with subequal flat granules ; a series of conical 

 tubercles form a serrated ridge on the anterior part of the back ; no 

 gular nor ventral crest. No tarsal process. Tail much longer than 

 head and body. Usually a more or less distinct light band along 

 each side of the belly, from limb to limb. 



d. 2. 



millim. millim. 



Total length 390 296 



From end of snout to extremity of man- 

 dible 35 30 



From end of snout to extremity of casque 47 37 



Length of rostral processes 20 — 



Greatest width between lateral cranial 



crests 24 20 



Depth of skull (mandible included) .... 32 24 



Width of head 25 21 



Body 125 94 



Tibia 33 25 



Tail 230 172 



Madagascar. 



a,b. S • Madagascar. 



c, d,e. $ & hgr. <S . Madagascar. Dr. J. E. Gray [P.]. 



/. J . Near Tamatave. Rev. W. D. Cowan [C.]. 



ff. (^. E. Betsileo. Mr. T. Waters [C.]. 



