( 64 ) 



surface of the wrist and hand, and there is only one row of enlarged spines 

 along the upper surface of the dactylus. 



The 2nd and 3rd legs correspond with the chelipeds in having their 

 joints (except the dactyli) shorter and broader than in D. diogenes. 



It inhabits wide-mouthed shells. 



'674-5 „ . , ,n f .u 



= . Oanjam coast, 10 tath. ^ 



2193-4 



„ . Ganjam coast, 7 — 8 fath. 



H^ Ganjam coast, 7^— 9| fath. ) 



7 

 3487-8 



" Investigator." 



Ganjam coast, lOJ fath. 

 Orissa coast, 68 fath. 



7 



4256 



10 • 



1^, Madras Purchased. 



de Man's types from Mergui seem to have been lost. 

 The distribution of this species is uncertain. 



3. Diogenes custos, Fabr., Henderson. Plate VI., fig. i. 



Prtguyiw C!<sto, Fabricius, Ent. Syst. Suppl., 1798, p. 412: Bosc, Hist. Nat. Crust. II. 

 1802, p. 77: Latreille, Hist. Nat. Crust. VI. 1803. p. 165: Olivier, Encycl. Method. VIM. 

 1811, p. 644: Milne Edwards, Ann. Sci. Nat., Zool., (2) VI. 1836, p. 284, and (3) X. 1848, 

 p. 64, and Hist. Nat. Crust. II. 1837, p. 236; Diogenes custos, Henderson, Tr. Linn. Soc, 

 Zool., (2) V. 1893, p. 414 : Nobili, Boll. Mus. Torino, XVIII. No. 452, 1903, p. 15. 



Dio^sKfis JHi/«5, de Man, Journ. Linn. Soc, Zool., XXII. 1888, p. 232: Nobili, Ann. Mus. 

 Civ. Genova, XX. 1900, p. 492: Whitelegge, Mem. Austral. Mus. IV. Pt. 2, 1900, p. 166. 



Differs from D. dtcgenes in the following particulars: — 



The eyestalk is shorter, being less than two-thirds the length of the 

 anterior border of the carapace : hence the rostrum is longer in relation to 

 the eyestalk, being nearly half its length. 



The antennular and antennal peduncles are of equal length. 



The outer fork of the antennal acicle reaches well beyond the base of 

 the terminal joint of the peduncle : the antennal flagellum is not quite as 

 long as the carapace, and is quite thickly setose in its proximal half. [The 

 inner fork of the antennal acicle reaches about half-way along the penulti- 

 mate joint of the peduncle]. 



Though the edges of some of the joints of the chelipeds and legs — 

 e.g., all the edges of the merus, the inner border of the carpus, and the 

 upper border of the hand and dactylus of the chelipeds ; and the anterior 



