REPTILIA. 
125 
genera, that eaeh of them may he regarded as the typo of a 
separate group. The species of Hydrophis are very numerous, 
and their determination is one of the most difficult parts in 
herpetology. Many species, previously distinguished, but im- 
perfectly characterized, and therefore subsequently considered 
to be synonyms, have been reestablished by Dr. Giinther, who 
examined the typical specimens; the following appeared to be 
new to science : — 
Hydrophis rohusta, p. 364 ; H. melanosoma^ p. 367 ; H. torquata, p. 369 ; 
H. atriceps, p. 371 j H. latifasciata, p. 372; H. coronata, p. 372 ; H. diademoj 
p. 373; H. cantoris, p. 374; H. longiceps, p. 376; H, stricticollis, p. 376; H 
ellioti, p. 377. 
The heads and characteristic portions of the body of the 
greater part of the species are figured on plate 25. 
Fam. Crotalijd^e. Dr. Gunther (Kept. Brit. Ind.) has figured 
the head of Vtimeresurus strigatus (Gray), pi. 24. fig. D. 
New species and genera : — 
Trimercsurm anamallcnsis, Giinther, 1. c. -p. 387, pi. 24. fig. C, from the 
Anamallay Mountains; Trimeresurus monticola (Farias maculaia, Gray), 
Giinther, p. 388, pi. 24. fig. B, from the Himalayas. 
Feltopelor, g. n., founded by Gunther, p. 390, on Trimesuriis macrolepis 
(Beddome), and distinguished from Trimeresurus by its very large scales. 
The species is figured on pi. 23. fig. C. 
Ilalys himalayanus, Giinther, p. 393, pi. 24. fig. A, from the Himalayas ; 
Halys pallasii, Giinther, p. 392, from Tartary. 
Caudisona hasilisca, Cope, Proc. Acad. Nat. Sc. Philad. 1864, p. 166, from 
Mexico. 
Fam. ViPERiD^. Atheris polylepis, sp. n., Peters, Monatsber. 
Acad. Wiss. Berl. 18G4, p. 642, from Liberia. According to a 
private communication from Prof. Peters this snake is identical 
with Viper a chloroechis (Schleg.), the scales of which had been 
erroneously described. 
PSEUDOPHIDIA. 
Prof. Dumeril has published a catalogue of the species in the 
collection of the Paris Museum, Mem. Soc. Sc. Nat. Cherbourg, 
ix. 1863. One is new, viz. Wiinatrenia. unicolor, pi. 1. figs. 6 & 7, 
from Cayenne. 
The Recorder has discovered a very singular organ in the 
male of Epicrium glutinosum ; it is evidently an organ of copu- 
lation, situated in the cloaca, and composed of four bilobed pro- 
minences; it is exsertile, and retracted by a long, tape-like, 
bifid muscle. This, in connexion with their imperfect meta- 
morphosis and with the presence of dermal productions, appears 
