42 CARCINOLOGICAL STUDIES, 



in 1878 by Milne Edwards to the Leyden Museum under 

 the name of Gelas. Latreillii. As I thought this name to 

 be incorrect, I lately sent back the male specimen to 

 Paris, whereupon Prof. Milne Edwards informed me that 

 it is a true representative of Gelas. chlorophthalmus Latr. 



The nearest ally of this species is Gelas. Gaimardi M. 

 E,, but they may be distinguished by the different form 

 of the larger hand of the male. The cephalothorax of the 

 male presents exactly the same form in both species, I 

 find no difference of any importance. The two lines of the 

 upper orbital margin are a little more distant from one 

 another than in Gelas. Gaimardi. As to the cephalothorax 

 of the female, I observe that the antero-lateral margins 

 are directed a little more obliquely in Gelas. Gaimardi 

 than in the species of Latreille, and that the two lines of 

 the upper orbital margin are equally distant in both spe- 

 cies. In both species there is no trace of an accessory row 

 of granules near the lower orbital margin , neither in the 

 male nor in the female. 



The arm of the larger chelipede of the male has the 

 same form in both species; in both I observe an obtuse 

 tubercle a little before the distal end of the anterior mar- 

 gin, and in both the upper margin is a little granulated. 

 In both the upper surface of the wrist is finely granula- 

 ted. The larger hand of Gelas. chlorophthalmus i s 

 considerably higher in proportion to its 

 length than in Gelas. Gaimardi and is only twice 

 and a half as long as high, but that of Gelas. Gai- 

 mardi three times as long as high, Milne Edwards says 

 that the palm is longer than the fingers; this is not the 

 case on the figur which he published in 1853, nor in 

 the male from New Caledonia. In our specimen the 

 fingers are once and a third as long as the 

 palm and the latter is quite as long as high. 

 In both species the palm is margined on its upper bor- 

 der , which is not the case in Gelas. annulipes , where the 

 upper border is simply rounded. The outer surface is exactly 



J^otes from the Leyden M-useum , "Vol. XIII. 



