448 CHAM#LEONTIDA. 
feebly marked ; the distance between the commissure of the mouth 
and the extremity of the casque equals or slightly exceeds the dis- 
tance between the former point and the nostril ; no rostral append- 
ages ; lateral crest strong ; no trace whatever of occipital lobes. Body 
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. No tarsal process. Tail nearly as 
long as head and body. Gular-ventral crest white; usually a 
whitish streak on each side from the axilla, not reaching the 
groin. 
ro @, 
millim. millim 
Total lengty sissy ain oy eur veacaeiw en 283 259 
' From end of snout to extremity of man- 
OU Psa tien. ates nse aula ous ee Fe 32 28 
From end of snout to extremity of casque. 42 34 
Greatest width between lateral cranial 
CTESUB sone as nya wscan nm elh eee ena 16 14 
Depth of skull (mandible included) .... 28 23 
Width of head ........ 00.0.0... 02a, 22 18 
Body sient: srive Wo 9, abat aha tat ene Rae 113 106 
IDI Saggy ee eid sce sone Rees 26 24 
Dall. creed ved an wat em sie wale we sx 135 125 
Senegambia ; Soudan. 
a os. Senegal. J. Brooks, Esq. [P.}. 
6 Ss. Senegal. 
e-d. 3. Gambia. Capt. Moloney [P.]}. 
eh. SQ. W. Africa. Mr. Dalton [C.]. 
ik. 2 & her. 500 miles south of Consul Petherick [C.]. 
Khartoum. (Types of C. levigatus.) 
7. Chameleon gracilis. (Prars XXXIX. fig. 4.) 
Chameeleo senegalensis, part., Gray, Cat. p. 266. 
: dilepis, part., Gray, J. ¢. 
Chameleo gracilis, Hallow. Journ. Ac. Philad. 1842, p. 324, pl. xviii., 
and Proc, Ac. Philad. 1854, p. 99; A. Dum. Arch. Mus. x. p. 173; 
Gray, Proc. Zool. Soc. 1864, p. 471; Boettg. 24-25. Ber. Offend. 
Ver, Naturk. 1885, p. 173. 
granulosus, Hallow. Proc. Ac. Philad. 1856, p. 147. 
—— burchellii, Hallow. 1. e. 
—— simoni, Boettg. 1. c. p. 175, 
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 lobes, which are not movable, and reduced to 
an angular fold below the extremity of the casque. Granules of 
