82 COLUBRID. 
Heterurus bicolor, Jan, Icon, Gén. 38, pl. ii. fig. 3 (1871). 
Anoplodipsas viridis, Peters, Mon. Berl. Ac. 1869, p. 442, pl. —. 
4. 
Dipsadoboa assimilis, Matschie, Sitzb. Ges. Nat. Fr. 1898, p. 173. 
Rostral broader than deep, scarcely visible from above ; inter- 
nasals broader than long, about half as long as the prefrontals ; 
frontal a little longer than broad, as long as or a little longer than 
its distance from the end of the snout, shorter than the parietals ; 
loreal as long as deep or deeper than long; one preocular, usually 
in contact with the frontal; two postoculars; temporals 1+2; 
eight or nine upper labials, fourth and fifth, fifth and sixth, or 
fourth, fifth, and sixth entering the eye:;. five or six lower labials 
in contact with the anterior chin-shields, which are as long as or 
shorter than the posterior. Scales in 17 rows. Ventrals 186-216; 
anal entire; subcaudals 66-100, Green or dark purplish brown 
above, yellowish beneath. 
Total length 790 millim. ; tail 160. 
West Africa. 
A. Green above. 
(V. 186;-0.68), -  W.Africa. Mr. Rich [0.]. (Type. 
4 3. 193; C. 76). Fernando Po, Dr. Giinther px 
B. Dark purplish brown above. 
a-b. 9 (V.199; C.?)&  Riodel Rey. H.H. Johnston + [de 
hoa (W. 210; C. 08). Hien Ed 
ec. 9 (V. 194; C. 66). Gaboon. 
150. RHINOBOTHRYUM. 
Rhinobothryum, Wagler, Syst. Amph. p. 186 (1830); Dum. § Bibr. 
Erp. Gén. vii. p. 1060 (1854) ; Ginth. Cat. Col. Sn. p. 176 (1858) ; 
Jan, Elenco sist. Ofid. p. 102 (1863). 
Dipsas, part., Schleg. Phys. Serp. ii. p. 357 (1837). 
Maxillary teeth 14, equal, followed, after an interspace, by a pair 
of enlarged grooved fangs situated below the posterior border of the 
eye; anterior mandibular teeth longest. Head distinct from neck ; 
eye large, with vertically elliptic pupil; nostril very large, verti- 
cally oval, between two nasals and the internasal; rostral shield 
very large. Body compressed ; scales keeled, with apical pits, in 19 
or 21 rows; ventrals angulate and feebly notched laterally. Tail 
long ; subcaudals in two rows. 
Tropical South America. 
ie Rhinobothryum lentiginosum, 
Coluber lentiginosus, Scopoli, Delic. Flor. Faun, Insubr, iii. p. 41, 
pl. xx. fig. 2 (1785). 
Rhinobothryum macrorhinum, Wagl. Syst. Amph. p. 186 (1830). 
