416 MR. J. R. HENDERSON — A CONTRIBUTION 



Madras exainples. The B. custos of Stimpson, Hess, and Orlmaun, from New South 

 Wales and Queensland, is also probably referable to the present species. 

 Distribution. New South Wales {Dana, Henderson) ; 3Iadras {J. B. //.). 



212. Diogenes violaceus, n. sp. (PL XXXIX. figs. 3, 4.) 

 Madras, common ; many specimens (J. B. H.). 



The ophthalmic process is elongated, exceeding the oplithalraic scales by nearly half 

 its length, with the distal two thirds laterally spiuulose, and the terminal spinules rather 

 long. The outer margin of the ophthalmic scales is straight and spinulose, the distal 

 spinule being larger than the others. The antennal acicle is short, with a very slightly 

 produced inner process, and the outer process scarcely reaches the commencement of 

 the last peduncular joint. The eye-stalks slightly exceed the penultimate joint of the 

 antennal peduncle. The antennular peduncles are short, and do not extend beyond the 

 antennal peduncles. The antennal fiagellum is short, with comparatively few long 

 fringing hairs. 



The left chelipede has the carpus, hand, and fingers elongated, and the outer . surface 

 of all uniformly and finely granulated ; a faint dentate line is seen on the upper margin 

 of the carpus, hand, and mobile finger, and the lower and outer surface of the carpus is 

 subsulcate. The lower margin of the immobile finger is placed in the same straight 

 line as the lower margin of the hand. On the outer surface of the hand, at the carpal 

 articulation, starting from the proximal and lower angle, is an oblique subcristiform 

 elevation. The fingers are slightly incurved, their apices are acute, and a few small 

 tufts of hair are seen on the opposing edges. The ambulatory legs have the anterior 

 margin of the carpi and propodi faintly dentate and pubescent ; the dactyli are slender. 



Length of body 26 mm., of left chelipede 28 mm., carp)us 7 mm., pi'opodus 12 mm. 

 long and G mm. in height, dactylus 7'5 mm. long, and the second ambulatory leg 

 28 mm. long. 



The colour in fresh specimens is violet. This species differs from D. custos in size, 

 colour, and the form of the left chelipede. It is distinguished from all the smaller 

 species of the genus by its spinulose ophthalmic process. 



213. Diogenes planimanus, n. sp. (PI. XXXIX. figs. 5, G.) 



Rameswaram, one specimen {J. R. H.) ; Madras, not common, four specimens 

 {J. B. n.). 



The ophthalmic process is narrow and lanceolate, tapering towards the apex, and only 

 exceeding the ophthalmic scales by about one third of its length ; it is sparingly armed 

 with minute lateral spinules, of which a subaj)ical pair are most prominent. The 

 ophthalmic scales have the lateral margin straight and spinulose, the spinules slightly 

 increasing in size towards the apex. The antennal acicle is short, not reaching the 

 end of the penultimate peduncular joint; it is slightly produced internally, but scarcely 

 bifurcate, and the spinulose inner margin appears regularly concave. The eye-stalks 



