1899.] A. Alcock — Oarcinological Fauna of India. 45 



The Largest specimen (male) in the Indian Museum has tlic cara- 

 pace 24 millim. long and 44 millim. broad including the spines, but 

 there are numerous egg-laden females that are much smaller than this. 



In the Indian Museum are 33 specimens, from the Madras coast and 

 the Andamans, besides one of the Challenger duplicates from New- 

 Guinea. 



25. ? Neptnnus (Lupocycloporus) gracilimanus, (Stimpson). 



? Amphitrite gracilimanus, Stimpson, Proc. Acad. Nat. Sci. Philad. 1858, p. 38. 

 ? Neptunus gracilimanus, A. Milne Edwards, Archiv, du Mus. X. 1861, pp. 336, 

 339. 



This species, if my identification be correct, though much like 

 N. wMtei, is easily distinguished by the following difference : — 



(1) the transverse beaded ridges of the carapace are much less 

 distinct and are less numerous : they are six in number, the anterior 

 gastric one being absent : the carapace also is decidedly more convex : 



(2) the shape of the front is entirely different, for instead of being 

 cut into fonr subacute teeth of nearly equal size, it is cut into four lobes 

 of which the outer ones are broad and shallow while the middle two 

 are narrow and dentiform ; the inner supra-orbital angles also are much 

 blunter : 



(3) the last spine of the antero -lateral border is always in adults 

 more than twice the length of any of the others : 



(4) both the spines on the posterior border of the arm are near 

 the far end of that border : 



(5) the fingers are incurved, and the bending outwards at tip is 

 inappreciable : 



( 6) it is a much smaller species : the largest egg-laden female has 

 the carapace 11 millim. long and 21 millim, broad including the spines, 

 and there are numerous egg-laden females much smaller than this. 



The differences are constant throughout the whole series of speci- 

 mens of both sexes. 



In the Indian Museum are 45 specimens from the Andamans, G. of 

 Martabau, Arakan coast, and from the east coast of the Peninsula at 

 15-35 fms. 



26. Neptunus {Achelous') granulatus (Edw.) A. M. Edw. 



Lv/pea granulata, Milne Edwards, Hist. Nat. Crust. I. 454. 



Amphitrite gladiator, De Haan, Faun. Jap. Crust, p. 65, pi, xviii. fig. 1. 



Amphitrite speciosa, Dana, Proc. Ac. Nat. Sci. Philad. 1852, p. 84, and U. S. 

 Expl. Exp., Crust, pt. I. p. 276, pi. xvii. fig. 1. 



Achelous granulatus, A. Milne Edwards, Archiv. du Mus. X. 1861, pp. 344, 347, 

 and in Maillard's I'ile Reunion, Annexe F. p. 2, and Nouv. Archiv. du Mus, IV, 



