1895.] 
A. Alcock— Gcircinological Fauna of India, 287 
The chelipeds are stout but short, the legs are compressed, aud 
both are armed with large laminar spines of the same type as those 
that form the rostrum and the antero-lateral margins of the carapace. 
The ambulatory legs are subchelate much as in Acanthonyx. 
Zebrida adamsii , White. 
Zebrida adamsii, White, P. Z. S., 1847, p. 121; and Ann. Mag. Nat. Hist., 1848, 
Yol. I. p. 223 ; and ‘ Samarang ’ Crustacea, p. 24, pi. vii. fig. 1. 
Zebrida adamsii, J. R. Henderson, Trans. Linn. Soc., Zool., (2) Y. 1893, p. 351. 
Zebrida longisypina, Haswell, P. L. S., N. S. Wales, Yol. IY. 1879, p. 454, 
pi. xxvii. fig. 3 ; and Cat. Austral. Crust., p. 38. 
Body of a light delicate madder pink, the carapace with darker 
(liver-coloured) parallel longitudinal bands and alternating streaks, the 
legs and chelipeds with broad somewhat oblique cross-bands of the 
same darker colour : the median longitudinal dark band, and a band on 
either side of it, extend, discontinuously, from the carapace along the 
abdomen. 
The entire integument of the body and limbs is smooth, hard, and 
polished. The chelipeds are stout, with, short squat joints : the arm is 
trigonal with sharp-cut laminar edges, the upper and lower of which 
end in sharp teeth ; its broad distal end is also dentate : the wrist is 
surmounted by three laminar teeth disposed in a triangle: the hand 
has its upper edge raised into a compressed tooth. 
Of the ambulatory legs the 3rd, 4th, and 5th joints are strongly 
compressed, with the upper edges sharply aud acuminately carinate ; 
the fifth joiut is enlarged distally, and the strongly recurved dactylus is 
retractile against it in the manner of a subchela. 
In the Museum collection are a male and female from the coast of 
Travancore. 
Eumedonus, Edw. 
Eumedonus, Edw., Hist. Nat. Crust., I. 349. 
Eumedonus, Miers, J. L. S., Zool., Yol. XIY. 1879, p. 670. 
Carapace depressed, pentagonal: rostrum large, strongly prominent, 
bifurcate only near the tip. Orbits circular; their internal hiatus occu¬ 
pied by part of the antennal peduncle. Antennules folding obliquely ; 
their basal joint of large size. 
Antennae entirely concealed beneath the front; both the peduncle 
and the flagellum short. Chelipeds more massive than the other legs, 
and in the male much longer; armed with large spines. Ambulatory 
legs compressed; their third joint cristate; the second pair a little 
shorter than the third; the fifth pair dorsal in position. The abdomen 
in both sexes consists of seven separate segments. 
