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). 



2. The rostrum bears a distinct longitudinal carina in its anterior half. 



3 . 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 5. 

 decor ata) 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. 11) 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. 



9. The inner margin of the bifurcate process from the base of the uropod is finely 



serrate, not spinous. 



The rostrum in this species is rather longer than in S. latreillei and decor ata ; 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. 1 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. There 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 5. decor ata 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 



1 It is the inner margin of the stalk that is dilated in this species and not the outer, as in 5. 

 latreillei, S. decorata and S. microphthalma. The figures are all of right eyes ; compare fig. 6 with figs. 3, 

 13 and 17. 



