1898.] A. Alcock — Cardiological Fauna of India. 171 



and propodites each with two or three rows of spinules and sharp 

 granules. 



Colours in spirit — yellowish or reddish brown ; fingers black, the 

 colouration stopping sharply at the base of the thumb. 



Carapace 8 millim. long, 13 millim. broad. 



In the Indian Museum are 19 specimens from the Andamans. 



This species is very closely related to G. melanodactylus, A. M. Edw. 

 (of which we have in the Museum specimens from Samoa) but differs 

 in having (1) only a few scattered hairs on the carapace, (2) the front 

 deeply bifid and elegantly denticulate, with the outer angle isolated 

 and spine-like, (3) the sculpture of the carapace much sharper and 

 bolder, (4) the pearly granules and spine-like tubercles of the chelipeds 

 more numerous and close-set. 



From G. spinipes it differs in having (1 ) the front sharply spinu- 

 late, (2) the first spine of the antero-lateral border almost as large and 

 well spaced as the other three, the 2nd and 3rd spines moreover having 

 almost always an accessory spinule near the tip, (3) the spines of the 

 legs not so large and acicular and not so much concealed by hairs. 



It may very possibly be the Pilodius scabriculus of Dana. 



Sub-genus Cyclodius, Dana. 



Cyclodius, Dana, Silliman's Araer. Journ. Sci. and Arts, (2) XIT. 1851, p. 126; 

 and U. S. Expl. Exd. Crust, pt. I. p. 222. 



Cyclodius agrees in every particular with Chlorodopsis, excepting 

 only that the carapace is longer and narrower, being, in fact, almost as 

 much sub-circular as hexagonal. 



In general form, as in the relations of the basal antennal joint, 

 Cyclodius much resembles Etisodes, from which, however, the form and 

 breadth of the front at once distinguishes Cyclodius. 



95. Chlorodopsis (Cyclodius) ornata, Dana. 



Cyclodius ornatus, Daua, Proc. Acad. Nat. Sci. Philad. VI. 1852, p. 80 ; and 

 U. S. Expl. Exp. Crust, pt. I. p. 223, pi. xii. figs, lla-g. 



Carapace flattish, about f as long as broad, almost as much sub- 

 circular as hexagonal, its regions and subregions delimited by well cut 

 grooves, the subregions being numerous and having a microscopically 

 granular surface. 



Front a little more than half the greatest breadth of the carapace, 

 bilobed, the outer angle of each lobe well pronounced. Orbital margin 

 with two grooves above and one at the outer angle. 



Antero-lateral margin cut into four teeth (exclusive of the orbital 

 angle) the last three of which are procurved and claw-like. 



