140 OPHIDIA. 
2. Tropidodipsas dumerilii. (Tab. L. fig. A.) 
Tropidodipsas fasciata, spec. c, Giinth. Cat. Col. Sn. p. 181. 
Leptognathus dumerilii, Jan, El. System. 1863, p. 101 (March). 
Tropidodipsas sartorii, Cope, Proc. Ac. N. Sc. Phil. 1863, p. 100 (April). 
Leptognathus sartorii, Cope, Proc. Ac. N. Sc. Phil. 1868, p. 109; Bull. U. S. Nat. Mus. no. 32. 
Geophis annulatus, Peters, MB. Ak. Wiss. Berl. 1870, p. 648, t. 1. fig. 2. 
Galedon annularis, Jan, Iconogr. Ophid. xxxvi. t. 5. fig. 1. 
Leptognathus sexscutatus, Bocourt, Bull. Soc. Philom. 1884, p. 187. 
Leptognathus leucostomus, Bocourt, Bull. Soc. Philom. 1884, p. 138. 
Leptognathus (Tropidodipsas) bernoullii, Mull. Verh. naturf. Ges. Basel, viii. p. 272, t. 1. f. 3 
(1887). . 
Leptognathus (Tropidodipsas) cuculliceps, Miill. Verh. naturf. Ges. Basel, vill. p. 273, t. 1. fig. 4 
(1887). 
Hab. Mexico, Vera Cruz, Mirador (Sartorius), Orizaba (Mus. Brit.), Yucatan (Mus. 
Brit. and Mus. Paris); Guaremata, Coban (Sarg), Atitlan (Commiss. Geogr.), 
Vera Paz, Hacienda de Chitalon (Bernoullt). | 
This form has also seventeen rows of scales, but a very short snout, and consequently 
the posterior chin-shields are reduced to a pair of scale-like scutes, much shorter than 
the anterior. The number of upper labials varies between six and eight, and the 
scutellation between the eye and nostril is subject to great variation, which has led to 
the creation of several of the specific names enumerated. ‘The keels of the scales are 
very faint, and may disappear altogether in preserved specimens. 
The coloration of the specimen figured is that of a living example which was 
received by the Zoological Society in 1884, and lived for a short time in the Gardens. 
The (in spirit) white, black-tipped scales of this beautiful snake are coral-red during 
life ; none of them were yellow. 
3. Tropidodipsas philippii. 
Tropidodipsas fasciata, spec. e, Giinth. Cat. Col. Sn. p. 181. 
Leptognathus philippii, Jan, Iconogr. Ophid. xxxvii. t. 5. fig. 1. 
Leptognathus albocinctus, Fisch. Jahrb. Hamburg. Wiss. Anst. 11. p. 107, t. 4. fig. 9 (head) (1885). 
Hab. Mexico, Mazatlan (us. Hamb.). 
4. Tropidodipsas anthracops. 
Leptognathus anthracops, Cope, Proc. Ac. N. Sc. Phil. 1868, pp. 108, 186 ; Bull. U. S. Nat. Mus. 
no. 32, p. 66. 
Hab. West Nicaracva (Cope). 
