214 Carcinological Fauna of India. 



i. Outer edge of baud, if sharp, never distinctly 

 carinate : front with the dorsal surface uniformly 

 convex : — 



a. Thoracic sinus defined ventrally by relatively 

 large granules : bepatic region culminating, dor- 

 sally, in a granular eminence : arms covered with 

 tubercles : hands subglobular : abdomen of female 

 of 4 pieces, the large third piece incompletely 

 subdivided into three L. whitei. 



b. Thoracic sinus not defined by granules : hepatic 

 regions smooth and ill-defined : surfaces of arms 

 not everywhere invested with tubercles, a definite 

 patch of spongy pubescence at the basal end of 

 the upper surface : hands of the ordinary form : 

 abdomen of female formed of 3 pieces : — 



act. Four rows of tubercles — including those on 

 the inner and outer margins — along the upper 

 surface of the arm : fur and pubescence on cara- 

 pace and chelipeds black (in spirit) : carapace 



(in spirit) reticulated with bright brown L. margaritata. •■ 



bb. Upper surface of arm with only a few tuber- 

 cles besides those on the margins : fur and 

 pubescence yellowish white : carapace covered 



with crimson spots , L. h&matosticta. 



ii. Outer edge of hand strongly carinate : front with 

 the dorsal surface concave in the middle line giving 



a bilobed appearance L. elata. 



2. Lateral epibranchial angle and true postero-lateral 

 border of the carapace devoid of fur : — 



i. Front prominent beyond the hepatic regions : pos- 

 terior border of the carapace not equal in length to 

 half the greatest breadth of the carapace : thoracic 

 sinus deep and sharply defined in front : hand hardly 



longer than the fingers L. cumingii. 



ii. Front hardly prominent beyond the unusually 

 strong convexity of the hepatic borders : length of 

 the posterior border of the carapace more than half 

 the greatest breadth of the carapace : hand about 



twice as long as the fingers L. sima. 



B. Peculiar genera : — 



I. Free edge of front not projecting beyond the level of 

 the epistorae. Otherwise belonging to the craniolaris 



group L. truncata, 



II. Hands foliaceous : chelipeds shorter than the carapace : 

 thoracic sinus ill defined. Otherwise belonging to the 



longifrons and marmorea group,.,.,. L. phyllochira. 



219 



