1913. ] S. Kemp: Crustacea Stomatopoda of the Indo-Pacific Region. 29 
1. The median carina of the carapace is well marked and there are in addition 
traces of intermediate and lateral carinae. ‘There is a small subsidiary spinule 
below the stout spine which defines the antero-lateral angles (fig. 7). 
_ The rostrum bears a distinct longitudinal carina in its anterior half. 
. The eyestalks reach beyond the middle of the basal segment of the antennular 
peduncle. 
4. The two basal segments of the endopodite of the antenna are short and do not 
reach to half the length of the antennal scale. 
5. The mandibular palp is entirely absent. 
6. The lateral margin of the fifth thoracic somite is produced as a broad falcate 
process, which is very strongly bent forwards (much more so than in S. 
decorata) and closely resembles that of S. scorpio ; the lateral margins of the 
two succeeding somites are more narrowly rounded than in either of the 
preceding species (fig. 5). 
7. The dorsal surfaces of the free thoracic and first five abdominal somites are 
finely rugose. 
8. The dorsal surface of the telson, in the female (fig. 12), is finely rugose on either 
side of the median carina, but is without any trace of tubercular ridges. In 
the adult male (fig. rr) the surface is smooth, but a huge curved and rounded 
ridge, higher than the median carina, extends from the vicinity of the antero- 
external angle to the apex of the submedian teeth. In both sexes the post- 
anal crest is represented only by a single prominent tubercle. 
g. The inner margin of the bifurcate process from the base of the uropod is finely 
serrate, not spinous. 
Co N 
The rostrum in this species is rather longer than in S. Jatreillei and decorata ; it is 
only a little broader than long and its lateral margins are upturned. The cornea of 
the eyes is also rather larger than in the two preceding species and the inner margins 
of the stalk, though considerably flattened, do not lie close against one another.’ The 
antennular peduncle is shorter than the carapace, excluding the rostrum. 
The dorsal crest of the carpus of the raptorial claw (figs. 8, 9) terminates in a 
subacute point and is sometimes obscurely notched near the middle. The propodus 
of the adult male (fig. 8) is very broad distally, though normally developed in the 
female (fig. 9). The dactylus is, in the male, externally convex and slightly swollen 
at the base ; in the female it is less swollen and the outer margin is very distinctly 
sinuous. ‘here are five dactylar teeth (including the apical one) and these are much 
longer and more slender in the female than in the male. As in S. decorata all the teeth 
are well separated from one another. 
In addition to the falcate lateral process, the fifth thoracic somite bears a blunt 
forwardly-directed tooth on either side of its inferior surface (fig. 10). The lateral 
' It is the inner margin of the stalk that is dilated in this species and not the outer, as in S. 
latreillet, S. decorata and S. microphthalma. ‘The figures are all of right eyes; compare fig. 6 with figs. 3, 
13 and 17. 
