238 
A. Alcock —Garcinoloyical Fauna of India. 
[No 2, 
1. Carapace oblong: rostrum broadly la¬ 
minar, vertically or nearly vertically 
deflexed : orbits complete, but shallow.. 
2. Carapace subcylindrical, the rostrum 
along with the front part of the gastric 
region vertically deflexed. 
Alliance 3. Pericer- 
oida. — Carapace- 
usnally broadened 
anteriorly by the 
outstanding or¬ 
bits : the orbits 
are either nearly 
or quite complete 
above and below, 
being formed by*^ 
a strongly-arched 
supra-ocular eave 
in close contact 
with an excavated 
post-ocular lobe, 
a process of the 
basal a n tje n n a 1 
joint filling in the 
floor below. 
J 3. Carapace more or 
less pyriform: ros¬ 
tral spines distinct 
from the base, ho¬ 
rizontal or slightly j 
deflexed: orbits in'l 
the^ form of out¬ 
standing, [t ubes 
which completely 
^J[ensheatliethe eyes. 
' i. Kostral spines di¬ 
vergent. 
ii. Eostral spines 
parallel and close¬ 
ly approximated 
throughout their 
h extent. . ... 
Micippa. 
Cyphocarcinus. 
Macrocoeloma. 
Tiarinia. 
Alliance I. Maioida, 
Maia (Lamk.) Edw. 
[Maia , Lamarck, Syst, Anim. sans verteb. Y. 154 ( partim).~\ 
Maia, Latreille, Hist. Nat. Crust. YI. 87 ( partim ). 
Maia, Desmarest, Consid. Gen. Crust., p. 143. 
Maia, Milne-Edwards, Hist. Nat. Crust., I. 325. 
Maia, Miers, Journ. Linn. Soc., Zool., Yol. XIY. 1879, p. 655. 
Carapace pyriform, with the regions indistinct, the surface closely 
grannlar or spinular, and the lateral borders usually armed with large 
spines. The rostrum consists of two rather short, straight, divergent 
spines. The basal joint of the antennas is broad, and has both the antero- 
external and antero-internal angle produced to form spines: the mobile 
portion of the antenna, which appears to spring from within the orbit, 
is completely exposed. The eye-stalks are long and curved, and bear 
the cornea chiefly on their ventral surface. The orbit is formed by 
a prominent supra-ocular eave which has its postero-external angle 
produced, by a sharp post-ocular spine, and by another spine between 
these two: the eyes are completely concealed from dorsal view when 
retracted. The external maxillipeds have the merus as broad as the 
ischium, the palp being attached to the antero-internal angle of the 
merus. 
The chelipeds are slender, with cylindrical joints and styliform 
fingers. The ambulatory legs decrease very gradually in length : the 
first pair are not much longer than the carapace and rostrum : the dac¬ 
tyl! of all are styliform. 
The abdomen in both sexes consists of seven distinct segments. 
