197. MioDON. 251 



broad, as long as its distance from the end of the snout, shorter 

 than the parietals ; nasal divided ; one prseooular, in contact with 

 the posterior nasal; one or two postooulars ; temporals 1 + 1; 

 seven upper labials, third and fourth entering the eye; first lower 

 labial forming a suture with its feUow behind the symphysial; 

 four lower labials in contact with the anterior chin-shields, which 

 are longer than the posterior. Scales in 15 rows. Ventrals 190- 

 216; anal entire; subcaudals 16-21. Whitish or pale reddish 

 above, with five black stripes, the median broadest and occupying 

 one and two half scales, the outer running between the second and 

 third rows of scales ; top of head black ; a whitish occipital bar 

 edged with black behind ; end of snout, upper lip, tip of tail, and 

 lower parts white. 



Total length 550 millim. ; taU 30. 



Guinea ; Congo ? 



a. Hgr. { V. 190 ; C. 21). Ashantee. Mr. McCarthy \G.\ 



b. 2 (V. 210 ; C. 17). W. Africa. J. C. Salmon, Esq. 



c. Skull of 4. 



[P.]. 



2. Miodon coUaris. 



Polemon barthii (non Jan), Ounth. Ann. ^ Mag. N. S. (3) xv. 1865, 



p. 90. 

 Microsoma collare, Peters, Sitzh. 6es. Naturf. Fr. 1881, p. 148; 



Bocage, Jom. So. Lisb. xi. 1887, p. 182, and Herp. Angola, p. 124, 



pi. xiv. tigs. 1 & 2 (1895). 

 Elapomorphus acanthias, part., Giinth. Ann. Sr Mag. N. S. (6) i. 



1888j p. 323. 



Diameter of eye about three fifths its distance from the oral 

 margin. Eostral broader than deep, just visible from above ; inter- 

 nasals considerably shorter than the prsefrontals ; frontal slightly 

 broader than the supraocular, once and a half as long as broad, as 

 long as its distance from the rostral, much shorter than the parietals ; 

 nasal divided, in contact with the prseocular ; two (rarely one *) 

 postoculars; temporals 1-|-1 (orl-|-2); seven upper labials, third 

 and fourth entering the eye ; first lower labial forming a suture 

 with its fellow behind the symphysial ; four or five lower labials 

 in contact with the anterior chin-shields, which are longer than 

 the posterior. Scales in 15 rows. Ventrals 201-228 ; anal 

 divided ; subcaudals 16-22. Blackish above and on the sides down 

 to the outer end of the ventrals and subcaudals, or dark grey with 

 the scales edged with black ; head and nape pale brown, with some 

 black blotches on the crown and below the eye ; lower parts and 

 terminal caudal shield white. 



Total length 550 millim. ; tail 32. 



"West Africa (Old Calabar, Congo, Angola). 



a. ? (V. 204; C. 18). Old Calabar. 



* The specimen in the Collection hag a single postocular on one side. 



