20 COLUBRID. 
rows; ventrals rounded. Tail short, feebly compressed ; subcaudals 
in two rows. 
North Australia. 
1. Myron richardsonii. 
Myron richardsonii, Gray, Cat. p. 70 (1849). 
Neospades kentii, De Vis, Proc. R. Soc. Queensl. vi. 1889, p. 288, 
pl. xiv. 
Rostral nearly as deep as broad ; frontal as long as or a little 
longer than broad, as long as its distance from the rostral or the end of 
the snout, shorter than the parietals; loreal a little longer than 
deep; two pre- and two postoculars: temporals 14+2; eight or 
nine upper labials, fourth or fifth entering the eye; three pairs of 
chin-shields in contact on the median line, the anterior in contact 
with three or four lower labials. Scales rather feebly keeled, in 21 
rows. Ventrals 138-140; anal divided; subcaudals 30-35. Grey 
or olive above, with black cross-bars; head blackish; ventrals 
yellowish or pale brownish, edged with blackish in front, and with 
a more or less distinct dusky median streak. 
Total length 415 millim. ; tail 60. 
North Australia. 
a. 2 (V. 140; C. 35). N.W. Australia. Sir J. Richardson [P.}. (Type.) 
b. 2 (V. 140; C. 30). Port Essington. 
Both specimens are unfortunately in bad condition. 
129. GERARDIA. 
Gerarda, Gray, Cat. Sn. p. 77 (1849) ; Bouleng. Faun. Ind., Rept. 
p- 379 (1890). 
Campylodon, Dum. § Bibr. Mém. Ac. Se. xxiii. 1853, p. 499, and 
Erp. Gén. vii. p. 963 (1854); Jan, Arch. Zool. Anat. Phys. iii. 
1865, p. 268. 
Heleophis, F. Miill. Verh. Nat. Ges. Basel, vii. 1884, p. 286, 
Maxillary teeth 10, very small, followed by a pair of enlarged 
grooved teeth; mandibular teeth subequal. Head small, not 
distinct from neck; eye small, with vertically subelliptic pupil ; 
head-shields large; nostril in an undivided nasal; a single inter- 
nasal, separating the nasals; loreal present. Body cylindrical ; 
scales smooth, without pits, in 17 rows; ventrals rounded. Tail 
moderate; subcaudals in two rows. 
India, Burma and Ceylon. 
1. Gerardia prevostiana. 
Coluber (Homalopsis) prevostianus, Fyd. §& Gerv. in Guér, Mag. 
Zool., Cl. ili. 1887, pl. xiii., and Voy. Favorite, y. Zool. p. 70, 
pl. xxix, (1839). 
Gerarda bicolor, Gray, Cat. p. 77 (1849); Giinth. Ann. & Mag. N. 
HT, (4) i. 1868, p. 421; Theob, Cat. Rept. Brit. Ind. p. 180 (1876), 
