igi3-J S. Kemp : Crustacea Stomatopoda of the Indo-Pacific Region. 39 



The only other known specimens of 5. lata are those on which Brooks founded 

 his original description. They were found in the Arafura Sea, south of New Guinea, 

 in 49 fathoms, and the largest measured 82 mm. in length. 



10. Squilla gilesi, Wood-Mason, MS. 



Plate II, figs. 25 — 27. 



1908. Squilla gilesi, Iyloyd, Rec. Ind. Mus., II, p. 33 {sine desc). 

 1911. Squilla gilesi, Kemp, Rec. Ind. Mus., VI, p. 95. 



Squilla gilesi is an extremely close ally of 5. lata and it is possible that it will 

 eventually prove to be nothing more than a race or variety of that species. It is 

 distinguished only by the following characters : — 



1 . The intermediate carinae of the carapace are obsolete and are represented only 



by a pair of feeble and smoothly-rounded elevations. The lateral margins 

 of the rostrum are in most cases less decidedly sinuous (fig. 26). 



2. Submedian carinae are quite distinct on the last two thoracic (fig. 26) and on 



all the abdominal somites. 



3. The inner margin of the bifurcate process of the uropods bears only a series of 



serrations, though one or two of the ultimate members of the series may be 

 spinous (fig. 25). The lobe on the outer face of the longer tooth is small. 



4. Secondary sexual characters are strongly marked. In adult males the distal 



end of the raptorial propodus is proportionately much broader than in the 

 female, the dactylus is slightly dilated at the base, the teeth are shorter and 

 the outer margin more strongly convex. In this sex also the median carina 

 of the telson is greatly inflated, especially at its anterior and posterior ends 

 and the greater part of the distal margin is strongly swollen (fig. 27). 



The last character though only available in males, seems none the less to have 

 considerable importance. Brooks has noted that the sexes in 5. lata are alike and in 

 the examples in the Indian Museum scarcely any differences are perceptible even in 

 large examples over 70 mm. in length. In 5. gilesi, on the contrary, the modifica- 

 tions in the telson and raptorial claw are quite striking even in specimens only 55 mm. 

 in length. 



In other respects 5. gilesi bears an exceedingly close resemblance to the Indian 

 examples of 5. lata. The spines on the abdominal somites are sometimes a little more 

 numerous : — 



Carinae. Abdominal somites. 



Submedian .. .. .. .. 6, 



Intermediate .. .. .. (2)3,4,5,6. 



Lateral .. .. .. .. (1) (2) 3, 4, 5, 6. 



Marginal .. .. .. .. (1)2,3,4,5. 



There are one to three submedian denticles, five to eight intermediate, and one 

 lateral. 



