1898.] A. Alcock — Carcinological Fauna of India, 205 



Off Ceylon, 26|-34 fathoms. Four specimens. 

 The carapace of the largest specimen is 21 millim. long and 28 

 millim. broad. 



127. Actumnus tessellatus, n. sp. 



Legs tomentose and hairy, chelipeds inconspicuously tomentose in 

 parts, carapace bare. 



The entire dorsal surface of carapace, the upper and outer surfaces 

 of the wrists and the upper surface of the hands, have the form of an 

 elegant mosaic of smooth polygonal tile-like granules in the closest 

 possible contact everywhere. 



Carapace strongly convex, § as long as broad, regions well denned 

 and subdivided by broad depressions, the areolae strongly and somewhat 

 angularly convex. 



Front much less than a third the greatest breadth of the carapace ; 

 deeply cut into two prominent subfoliaceous median lobes, each of 

 which is flanked externally by a small dentiform lobule. 



Orbital margins smooth, not fissured, though there are narrow 

 inconspicuous depressions where the notches exist in other species. The 

 antennary flagellum springs from the orbital hiatus. 



Antero-lateral margins thin, sharp, cut into 3 teeth (not including 

 the orbital angle) the last 2 of which are subfoliaceous : postero-lateral 

 margins a little longer than the antero-lateral, markedly concave. 



Chelipeds little unequal : in addition to the mosaic ornamentation 

 there are a few scattered pustulous granules on the wrist and upper 

 surface of hand, and all the lower half of the outer surface of the hand 

 is studded with pearl-like or bead-like granules, which are also found 

 on the bases of the fingers. 



The legs when denuded are smooth to the naked eye. 



Colours in spirit : lavender grey, a good deal suffused with orange- 

 pink, fingers cinnamon. 



Carapace 15 millim. long, 20 millim. broad. 



A male and a female from the Persian Gulf. 



128. Actumnus arbutum, n. sp. 



Legs with a somewhat scanty growth of hair not concealing their 

 sculpture, chelipeds slightly hirsute in places, carapace bare. 



The whole dorsal surface of carapace covered with sharp angular 

 crystalline granules in the closest possible contact : much the same 

 ornamentation is found on the upper and outer surfaces of the wrists 

 and on the upper surface of the hands, the lower half of the outer 

 surface of the hands being studded with pearly and bead-like granules. 



