448 CHAMiELEONTID^. 



feebly marked ; the distance between the commissure of the month 

 and the extremity of the casciuo equals or sliiihtly exceeds the dis- 

 tance between the former ])oint and the nostril ; no rostral ajjpend- 

 ages ; lateral crest strong ; no trace whatever of occipital lobes. J3ody 

 covered with very small, equal granules ; a series of somewhat 

 larger granules along the dorsal keel, not forming a distinct crest ; 

 a series of conical tubercles forms a very distinct crest along the 

 median gular and ventral line. Xo tarsal process. Tail nearly as 

 long as head and body. Gular-vcntral crest white ; usually a 

 whitish streak on each side from the axilla, not reaching the 

 groin. 



c?. 9. 



niillim. milliin. 



Total length 283 259 



From end of snout to extremitv of man- 



dil)le ". 32 28 



Prom end of snout to extremity of casque . 42 34 

 Greatest width between lateral cranial 



crests 16 14 



Depth of skull (mandible included) .... 28 23 



Width of head 22 18 



Body 113 106 



Tibia 26 24 



Tail 135 125 



Senegambia ; Soudan. 



«. c?. Senegal. J. Brooks, Esq. [P.]. 



b. S ■ Senegal. 



c-d. cS 2 • Gambia. Capt. INColonev [P.]. 



e-h. J?. W.Africa. Mr. Dalt(.u [C.^ 



i-k. $&hgr. 500 miles south of Cousul Petherick [0.]. 



Khartoum. (Types of C. laviyatus.) 



7. Chamsaleon gracilis. (Plate XXXIX. fig. 4.) 



CLaruseleo seuegalensis, part., Gray, Cat. p. 266. 



dilepis, part., Gray, I. c. 



Chamaeleo graciHs, Halloiv. Journ. Ac. Philad. 1842, p. 324, pi. xviii., 

 and Proc. Ac. Philad. 1854, p. 1)9 ; A. Dum. Arch. Mnn. x. p. 173 ; 

 Gray, Proc. Zool. Sac. 1864, p. 471 ; L'octty. 24.-25. Per. Offenh. 

 Ver. Nafurk. 1885, p. 173. 



granulosus. Hallow. Proc. Ac. Philad. 1856, p. 147. 



burchellii. Hallow. I. c. 



siiugni, Boetfy. I. c. p. 1 75. 



Casque feebly raised posteriorly ; parietal crest indistinct or 

 feebly marked ; the distance between the commissure of the mouth 

 and the extremity of the casque nearly equals the length of the 

 mouth ; no rostral appendages ; lateral crest strong : a distinct 

 indication of occipital lol)es, which are not movable, and reduced to 

 an angular fold below the extremity of the casque. Granules of 



