68 
Zoological Miscellany, 
XXI. Hydrops. Head small, shielded; frontal plates 3, small, anterior 
frontal transverse ; vertebral and occipital moderate ; superciliary small ; 
loreal none ; 1 anterior and 2 posterior oculars ; upper labial plates all 
simple ; body slender, cylindrical ; tail elongate. 
* Scales in 15 rows. 
1. Hydrops Martii, Wagler. Homalopsis Martii, Scblegel, 356, t. 13, 
fig. 19, 20. JElaps Martii, and E. triangularis^ Wagler, 
Inhabits Central America. Mus. Leyden. 
* * Scales in 19-21 roivs. 
2. Hydrops Reinwardtii. Homalopsis Reinwardtii, Scblegel. 
Inhabits ? Mus. Leyden. 
XXII. Mir ALIA. Head small, shielded; anterior frontals 2, small, 
triangular ? loreal ? I anterior 2 posterior oculars ; occipital plates 
large ; temples shielded : body slender, compressed : tail short, thick, 
conical. 
1. Miralia alternans. Brachyorros alternans, Reus. Mus. Senk. t. 9, 
fig. 3. Homalopsis decussata, Scblegel, Phy. Serp. t. 13, fig. 14, 16. 
Inhabits Java. Mus. Leyden and France. 
XXIII. Farancia. Anterior frontals united into a triangular trans- 
verse plate ; posterior frontal broad, bent down on the sides : vertebral 
plates broad, six-sided ; superciliary narrow in front ; occipitals elongate ; 
nostrils sublateral, small, in the middle of a 4-sided plate, with a line to the 
lower edge ; 1 oblong 4-sided anterior, 2 posterior oculars, the lower small- 
est : body fusiform ; scales smooth : ventral shields rather narrow, rounded : 
tail conical ; sub-caudal plates 2-rowed. 
1. Farancia Drummondii. Black : lower sides with alternating black 
and white bands meeting in the centre ; upper lip and chin white with 
black spots ; under part of tail with black cross bands. 
Inhabits California. Brit. Mus. Mr. Drummond. 
Intermediate between Hydridce and Elapsina of Colubridce. 
Monographic Synopsis of the Vipers, or the Family 
Vi PERI DM. By J. E. Gray, F.R.S. 
The family contains 8 genera and 21 species, of which 2 genera and 3 
species are from Asia, 4 genera and 12 species from Africa, 2 genera and 4 
species in Europe, and 1 genus and 1 species from Australia. All the ge- 
nera are confined to a single quarter of the globe, except Echis, which has 
1 species from Africa and the other from India. Scblegel described only 
10 species; but then he refers, without consideration, some of the species 
which have not come under his examination to the more common species. 
The British Museum collection contains all but four of the species here 
described. 
