41 



the first 2 pair, and end iu a powerful talon-like dactylus. The fourth (last) 

 pair of legs are short and slender. 



The sternal grooves of the female do not meet ; they end in scroll-like 

 tubercles on the second segment of the sternum, between the bases of the 1st 

 pair of ambulatory legs. 



Tlie branchial formula is as follows : — 



Total 1 + 4 ep. 5 4 4 = I4 + 4ep. 



Distribution : Indo-Pacific from the Indus Delta on the west to Hons-kono- 

 on the east and to the coasts of Queensland on the south, in shallow water 

 usually. 



Conchwcetes artificiosus, (Fabr.) Stimpson. Plate III., fig. IG. 



Dromia artifciosa Fabriciug, Ent. Syst. Suppl., p. 360, Bosc (U), Latreille (55). • 



Cancer arfificiosu^, Herb-st (-14). Conchcecetoi a)-h>'cio.su.s Stimpson (99), Headeraon (43), Alcock (3). Dromia 

 conchifera, Haswell (37 & 38). 



For references see Journ. Asiatic Soc. Bengal, LXVIIL, pt. 2, 18P9, p. 151. 



Carapace pentagonal, with the posterior border of the pentagon curved, its 

 dorsal surface quite flat, its greatest length (in the adult) about eqnal to its 

 greatest breadth, its regions all well defined by grooves, the cervical and bran- 

 chial furrows both equally well cut. There are sometimes a few granules near 

 the borders of the carapace. 



Front cut into 3 teeth with granular edges, the middle tooth being smaller 

 and on a much lower plane than the others. 



Upper border of orbit very oblique : a granidar spine or tooth marks the 

 true inner supra-orbital angle of higher Brachyura. Outer border of orbit 

 appai-ently wanting, but on denudation it is found to be defined by a concave 

 row of granules. Sub-orbital lobe granular and dentiform. 



On the lateral borders of the carapace are usually two teeth, one immediately 



behind the cervical groove, the other immediately behind the branchial groove : 



one (the posterior) or both of these teeth may be nearly worn away, but usually 



they are both very distinct. Between the first spine and the orbital tooth is a 



6 



