ia 
> \ 
ri ‘ ’ 
ij 
‘ 
om | 
breadth of the front being as 11:7; the abdomen of the male 
is a little less enlarged, and therefore completely resembles 
the abdomen of S. picta, as figured by de Haan, the posterior 
margin of the penultimate joint being a little less than three 
times as broad as the length of the joint. The hands of the 
male differ from those of the type by the palm being a little 
larger in proportion to the fingers, the latter being quite as 
long as the palm. The hands are a little higher than half their 
length, the proportion of the latter to the height being as 163 : 93. 
The inner edges of the fingers are more strongly denticulated, 
the immobile finger being armed with three rather strong teeth, 
and with some smaller teeth at the base. 
The coloration of the hands is also somewhat different from 
the type. In the latter the red colour of the palm extends 
nearly to the tip of the fingers ; but in this variety that colour is 
found only on the palm and at the base of the mobile finger, 
the fingers being of a yellowish colour. 
CRUSTACEA OF THE MERGUI ARCHIPELAGO. 189. 
Dimensions :— 
millim. 
Distance between the extraorbital teeth ........ ye 
Wemethn ot the cephalothorax y..!)...f0.$. 9.056. 4. Wz 
IpreacGneolethenTOMbie se. teks foe tis Pe oes 113 
103. SEsarMa PoniTa, n. sp. (Pl. XIII. figs. 7-9.) 
Six fine specimens (4, 29) of this interesting species were 
collected at Sullivan Island. 
Sesarma polita is one of the small number of those represen- 
tatives of the genus in which the cephalothorax is longer than 
broad, and with two teeth behind the extraorbital tooth. It 
therefore appears to be allied to S. oblonga, v. Mart., from the 
Philippine Islands, and to some other species. In the form of its 
legs, this species more or less agrees with S. atrorubens, Hess, 
from Sydney, because the anterior legs are short and granular 
and the meropodites of the ambulatory legs rather slender and 
not dilated. The dactylopodites are short, thick, tomentose, 
and not spinulose, as in S. rotundata, Hess. Besides these cha- 
racters S. polita may be recognized at first sight by the upper 
surface of the cephalothorax being extraordinarily flattened and 
plain. 
The rather thin cephalothorax is longer than broad, the pro- 
