1913O S. Kemp: Crustacea Stomatopoda of the Indo-Pacific Region. 89 



1898. Squilla raphidea, de Man, Zool. Jahrb. Syst., X, p. 694. 

 1901. Squilla raphidea, Manchester, Proc. Zool. Soc, II, p. 553. 

 1903. Chloridella raphidea, Rathbun, Proc. U..S. Nat. Mus., XXVI, p. 55. 

 1903. Squilla raphidea, Nobili, Boll. Mus. Torino, XVIII, No. 455, p. 38. 

 1906 Squilla raphidea, Manchester, Fascic. Malayenses, Zool. Ill, p. 133. 

 1906. Squilla raphidea, Tattersal!, Ceylon Pearl Oyster Rep., V, p. 166. 



1910, Squilla raphidea, and var. af ricana, Balss, Abh. math.-phys. Klasse K. Bayer. Akad. Wiss., 

 Suppl., Bd. II, Abh. 2., p. 8, text figs. 2a— b. 



■ The dorsal surface of the carapace and abdomen is, as a rule, smooth , polished 

 and impunctate, but in very old examples is finely rugose. The breadth of the cara- 

 pace, measured behind the antero-lateral angles, is considerably less than half its median 

 length. The postero-lateral angles are very narrowly rounded and the lateral margin, 

 in the middle of its posterior half, projects as an acute lobe, the posterior edge form- 

 ing a rectangle with the adjacent margin of the carapace. The antero-lateral angles 

 end in small spines which in large specimens are a trifle upturned ; they fail to reach 

 the level of the rostral base. In front of the cervical groove the median carina is 

 distinct and is continued forwards beyond the small mid-dorsal pit ; the anterior 

 bifurcated portion is however entirely absent. The posterior margin is deeply con- 

 cave and the imperfectly calcified third and fourth thoracic somites are exposed. 



The rostrum is very variable in shape. It is smoothly elevated in the middle 

 and its upturned lateral margins meet in an acute or narrowly-rounded apex. In some 

 examples the rostrum reaches only to three-quarters the length of the antennular 

 somite and the lateral margins are evenly concave, while in others it may reach to the 

 distal edge of the somite and may have sinuous margins — concave on either side of the 

 apex. 



The corneal and peduncular axes of the eye are at right angles. The cornea is 

 sausage-shaped and its greatest breadth is fully one and a half times the length of the 

 whole organ. The antennular peduncle is about as long as the median length of the 

 carapace. 



The mandibular palp is composed of three segments. 



The merus of the raptorial claw is longer than in most species of Squilla ; when 

 naturally flexed it projects backwards beyond the postero-lateral angle of the cara- 

 pace. The outer inferior margin terminates distally in a blunt angle. The carina on 

 the external aspect of the carpus is not sharp and that on its dorsal edge is entire and 

 bends strongly inwards before reaching the distal margin. The propodus is charac- 

 teristic. The row of fine pectinations which exists in most species along the margin 

 opposed to the dactylus is replaced by a series of strong fixed spines ; seven or eight 

 of these spines are longer than the others and alternate more or less regularly with them. 

 As in allied species there are three strong movable spines on the inner basal edge of this 

 margin. The dactylus is provided with eight (rarely nine) teeth including the terminal 

 one. The outer margin is evenly convex in females and young males, but, in large 

 examples of the latter sex, is excavate at the base, the distal border of the excavation 

 being produced outwards as a strong rectangular process. 



