1913. | S. Kemp: Crustacea Stomatopoda of the Indo-Pacific Region. 83 
abruptly before reaching the anterior edge. The dactylus is provided with five teeth 
including the terminal one and its outer margin is evenly convex and obscurely lobed 
at its proximal end. . 
The last three thoracic somites possess the usual submedian and intermediate 
carinae and between these, in the anterior half of the somite, each bears a short and 
* rather obscure keel directed outwards and forwards. The fifth somite is bilobed 
laterally ; the anterior lobe consists of a long and sharp antrorse spine, the posterior is 
short and bluntly rounded. The margins of the two following somites are not 
bilobed, but are obliquely truncate (more squarely than in S. /aevis or S. hieroglyphica) 
and are rounded posteriorly. 
The first five abdominal somites, in addition to the usual eight longitudinal carinae , 
possess also a sharp and distinct median keel. This carina never terminates in a 
spine :— 
Carinae. Abdominal somites. 
Submedian x RP) oF 5, 6. 
Intermediate ax AD =e 5, 6. 
Lateral .. i a 50 ONG SZ GS, ©: 
Marginal a se a0 T2563 rey.) 0: 
The telson is rather longer than broad, and is sharply distinguished from the ma- 
jority of the preceding species by the prominent carination of its dorsal surface. The 
median carina is well developed and terminates ina sharp spine overhanging a small 
tubercle. On either side there is a deep longitudinal groove formed by a number of 
confluent pits and beyond this there is a well-marked longitudinal carina continued 
with or without interruption to the apex of the submedian spines. Each of the usual 
oblique rows of pits is replaced by a rather deep groove and the surface between the 
grooves is raised, forming three or four short* but distinct oblique carinae on either 
side of the median ridge. On the edge of the telson the usual six teeth are well deve- 
loped and there is a prominent praelateral lobe. There are three or four submedian 
denticles, six or seven intermediate and one lateral. The post-anal crest is absent. 
In the bifurcate process from the base of the uropod, the outer margin of the longer 
spine bears the usual lobe near the distal end of its proximal half ; the margin anterior 
to this lobe is straight or feebly convex. The inner margin of the process is slightly 
serrate. 
The secondary sexual distinctions appear to be rather pronounced. In the single 
large male the submedian carinae of the fifth abdominal somite, all the carinae of the 
last somite and the median and marginal carinae of the telson, are conspicuously 
swollen (fig. 69) and the propodus of the raptorial claw is strongly dilated at its distal 
end (fig. 69). 
The large male specimen, examined shortly after capture, exhibited a considerable 
amount of lemon yellow colouration on the abdominal somites, telson and raptorial 
1 In the large male specimen only. 
* In the large male these carinae are extremely short, little more than rounded tubercles, and the 
grooves are less conspicuous (fig. 69). 
