OOLUfiRIDUB. 



beneath, spotted with black; posterior vontrala and 8iiboaud;ils black, 

 with light edges. 



Total length :ii:j millim. ; tail 34. 



River Mapiri, Bolivia. 



2<>. Atractus trilineatus. 



Atractus trilineatus, ]\'a</l. /xi'x, 1*28, p. 742, pi. x. figs. 1-4. 



llali<losoimi lincsitnm, .Dum. iSj- /Mr. vii. p. 105 (1864) ; Jan, Arch. 

 '/,<><>!. Annt. Pln/s. ii. 1862, p. 17, and Icon. Gbn. 11, pi. ii. fi^. "> 

 (1805) ; Garm. Proc. Amc.r. Philos. Soc. xxiv. 1887, p. 280. 



Rhabdosoma lineatum, part., Gilnth. Cat. p. 11 (1858). 



Rabdosoma trivirgatum, Jan, II. cc. p. 17, ul. iii fig. 1. 

 pnnctatuvittatum, Jan, II. ec. p. 17, pi iii. fig. 2. 



Geophis lineatus, Giinth. Ann. fy Mag. N. H. (4) ix. 1872, p. !">. 



Snout obtusely pointed, llostral small, as deep as broad, visible 

 from above ; internasals small ; praefrontals at least as long as 

 broad ; frontal as broad as long, or a little broader than long, about 

 as long as its distance from the rostral, shorter than the parietal* ; 

 loreal at least twice as long as deep; two postoculars (rarely one) ; 

 temporals 1 + 2, rarely 2 + 2; eight (rarely seven) upper labials, 

 fourth and fifth (or third and fourtb) entering the eye ; four or five 

 lower labials in contact with the single pair of cbin-shields, which 

 are rather elongate, moderately broad, and separated from the 

 symphysial. Scales in 15 rows. Yentrals 125-150; anal entire; 

 fiubcaudals 11-19. Brown above, with three or four darker longi- 

 tudinal lines ; white beneath, uniform or with a few brown dots. 



Total length 225 millim. ; tail 15. 



Guianas, Trinidad. 



a-c. d (V. 125; C. 18) & Berbice. 



2 (V. 137, 139; C. 12, 



14). 

 d. 2 (V. 131 ; C. 11). Demerara River. S. S. Lawrence, Esq. 



[P.]. 

 e-f. S (V. 131 ; C. 19) Maccasseema, Brit. W. L. Sclater, Esq. 



& $ (V.140; C. 12). Guiana. [P.]. 



g. 2 (V. 14.'}; C. 13). Brit. Guiana. 



h-l. 2 (V. 147, 140; C. Trinidad. H. B. Guppy, Esn. 



13, 13) & yg. (V. 140, [P.]. 



136; C. 14, 19). 

 m-q. S (V. 129; C. 17) S. America. Mr. Mather [C.l 



fcyg. (V. 130,140,135, 



137; C. 17, 12,12, ] 9). 

 r. 2 (V. 133; C. 12). S. America. C. Baker, Esq. [P.]. 



21 . Atractus quadrivirgatus. 



Rhabdosoma lineatum, part., Gilnth. Cat. p. 11 (1858). 



Adelphicos quadrivirgatum, Jan, Arch. Zool. Anat. Phys. ii. 18G2, 





(1893). 



