104. GR.VYIA. 2S7 



Gravia triangularis, Bocnge, Jorn. Sc. Lisb. i. ISfiB, p. 47 ; Giinth. 



Ann. S,- May. N. II. (6) i. 1888, p. 8-25 ; Boettg. Ber. Senck. Ges. 



1887-88, p. 51. 

 Macropliis ornatus, Bocage, t. c. p. 67. 



llostral broader than deep, just visible from above ; internasals 

 longer than broad, as long as or longer than the prostrontals ; frontal 

 once and two thirds to twice as long as broad, longer than its 

 distance from the end of the snout, as long as or a little shorter 

 tlian the parietals ; loreal longer than deep ; one prge- and two 

 postoculars ; temporals 2 + 3; seven or eight upper labials, fourth 

 entering the eye ; four or five lower labials in contact with the 

 anterior chin-sliields, which arc a little shorter than the posterior. 

 Scales in 17 (rarely 19) rows. Ventrals 145-1 fil; anal divided; 

 subcaudals 74-103. Brown or olive above, with black cross bands 

 tapering to a point towards the ventrals, or with light black-edged 

 cross bands widening towards the belly ; or dark olive with the scales 

 edged with black ; or uniform blackisla olive ; belly yellow, uniform 

 or spotted with black, or entirely blackish. 



Total length ] 250 millim. ; tail 450. 



West Africa, from Sierra Leone to Angola. 



A. Belly yellow, with or without black spots. 



a. 2 (V. 147 ; C. 93). Boma, Congo. Dr. Leach [P.]. 



(Type of C. smythii and of 

 G. silurophaga.) 



b. Yg. (V. 150 ; C. ?). Mouth of the Loango. Mr. H. I. Duggan 



[C.]. 



c. rf (Sc. 19; V. 147; Gaboon. 

 C.?). 



(?. $ (V. 161 ; C. ?). Opposite Fernando Po. Mrs. Burton [P.]. 



e-f. 6 (V. 154 ; C. 99) Oil River. H. H. Johnston, Esq. 



& $ (V. 161 ; C. 89). [P.]. 



g. S (V. 148; C. 97). Sierra Leone. Sir A. Kennedy [P.]. 



h. Hgr. S (V. 151 ; C. 97). W. .\friea. Mr. Rich [C.]. I 



i. Hgr. c? (V. 149; Africa. ( 



C. 101). (Types of G. silurophaga.') 



B. Belly black. 



k. Yg. (V. 147; 0. 82). Gaboon. 



/. Yg. (V. 145 ; C. ?). Cette Cama, Gaboon. 



m. Yg. (V. 148 ; C. 74). Congo. 



2. Grayia furcata. 



Grayia furcata, Mocquard, Bull. Soc. Philom. (7) xi. 1887, p. 71. 



Distinguished from G. smytliii by the smaller and more irregular 

 temporals, nine upper labials instead of seven or eight, and the 

 more numerous ventral shields (219). Subcaudals 88, In colour 

 resembling the barred form or G. smythii ; posterior ventral and 

 subcaudal regions blackish. 



Toial length 1012 millim. : tail 292. 



Brazzaville, Congo. 



