CARCINOLOGICAL STUDIES. 43 



as finely granulate as in Gdas. Gaimardi, the very- 

 small granules being visible for the naked eye only towards 

 the upper margin. The under margin of the palm bears a 

 row of granules, about as in Gelas. Gaimardi and Gelas. 

 annulipes. The fingers are quite smooth , except the base 

 of the dactylus which is somewhat granulate as in the 

 other species. The fingers agree with the quoted figure as 

 regards their form. The mobile finger presents at its inner 

 margin four granules along the proximal half, and a fifth 

 at the beginning of the distal third, but no prominent tooth. 

 Whereas the immobile finger of Gelas. annulipes is marked 

 with a longitudinal furrow close to the lower margin, the 

 lower margin of the index of Gelas. Gaimardi and Gelas. 

 cJilorophthalmus is simply rounded and not furrowed , the 

 furrow, which runs near the lower margin of the palm, 

 being interrupted at the base of the finger. The inner 

 margin of the index is armed with a small tooth imme- 

 diately before the middle, preceded by four smaller granules, 

 and a second smaller tooth is placed at the distal extre- 

 mity. Milne Edwards describes the inner surface of the 

 palm as wanting the granular crests; but I find in our 

 specimen the three ordinary granular crests distinctly deve- 

 loped , one at the inner margin of the flattened under 

 surface of the palm , the granules of which are little pro- 

 minent, and two rows of granules near the articulation 

 of the fingers. 



The ambulatory legs also fully agree with those of Gelas. 

 Gaimardi; those of Gelas. annulipes and of Gelas. lacteas 

 de Haan are considerably more slender. So e. g. the mei'O- 

 podites of the penultimate pair of legs of the male have 

 a length of 8 mm. and a breadth of S'/g mm.; in a spe- 

 cimen of Gelas. annulipes these dimensions are respectively 

 6^/4 mm, and 2^'2 °^"i- 1 ^^^ in ^ male of the Japanese 

 Gelas. lacteus 10 mm. and SV- mm., in a male of Gelas. 

 Gaimardi, however, 8V2 mm. and 3V5 mm. 



Gelas. chlorophthalmus may also be distinguished by its 

 colour (vide: Guerin, Icon. Crust., PI. 4, fig. 3), the cephalo- 



PJotes from the Leyden JMuseum, "Vol. XIIJ. 



