134 A. Alcock — Carcinological Fauna of India, [No. 1, 



Chlorodius samoensis, Miers, Ann. Mag. Nat. Hist. (4) XVI. 1875, p. 341 (Miers 

 infra.) 



Etisodes electra, Miers, Zool. H. M. S. Alert, pp. 183, 217, 517,532: de Man, 

 Archiv. fur Naturges. LI1I. 1887, i. p. 290: J. R. Henderson, Trans. Linn. Soc, Zool., 

 (2)£V. 1893, p. 362. 



Closely j resembles E. anaglyptus, from which it is distinguished by 

 the following characters : — 



(1) the carapace is even longer and narrower, the length being 

 quite f the breadth ; 



(2) the whole surface of the lobules of the carapace and of the 

 nodules of the wrist aud haud is closely granular ; 



(3 ) the front is cut into four teeth of nearly equal size ; 



(4) the legs, though hairy, are not so shaggy. 



In the Indian Museum are 4 specimens from the Andamans and 

 Nicobars, (besides three from Upolu and Mauritius). 



Alliance V. Halimedoida. 



Halimede. Polycremnus. 



Polycremnus, Gerstaecker. 



Polycremnus, Gerstaecker, Archiv. fur Naturges. XXII. 1856, p. 120. 



Carapace approaching the pentagonal, not very much broader than 

 long, distinctly convex fore-and-aft, slightly convex from side to side, 

 the regions rather indistinctly defined and to a certain extent subdivid- 

 ed by broad shallow depressions. 



The antero-lateral border is elegantly four-lobed and is continued 

 beneath the orbits to the outer angle of the buccal cavern. The postero- 

 lateral borders are moderately convergent and are about equal in length 

 to the antero-lateral borders and also to the posterior border. 



The fronto-orbital border is less than half the greatest width of the 

 carapace in extent. The front is narrow (less than a fourth the greatest 

 breadth of the carapace), sublaminar or hood-like, bilobed, and projects 

 well beyond the orbits. The three grooves in the vicinity of the outer 

 ano-le of the orbit are distinct. Eyes on short thick stalks. The inner 

 angle of the lower edge of the orbit is strongly produced. 



The antennules fold obliquely. The basal antennal joint is long, 

 rather slender, and well in contact with the front : the nagellum is long 

 (a good deal longer than the major diameter of the orbit) and is lodged 

 in the narrow orbital hiatus. 



Anterior edge of merus of external maxillipeds almost transverse. 



Chelipeds unequal in both sexes. Legs stout. 



Abdomen of the male with all 7 joints distinct and separate : the 

 last segment unusually long and acute. , 



