1913-] S. Kemp : Crustacea Stomatopoda of the Indo-Pacific Region. 31 



4. Squilla microphthalma, H. Milne-Edwards. 



Plate I, figs. 17 — 20. 



1837. Squilla microphthalmia, H. Milne-Edwards, Hist. Nat. Crust., II, p. 523. 



1 841. Clorida microphthalma, Eydoux and Souleyet, Voy. de la 'Bonite,' Zool. I, Crust., 



pp. 264, 266. 

 1849. Squilla microphthalmia , de Haan, in Siebold's Fauna Japonica, Crust., p. 221. 

 ? 1880. Chloridella microphthalma {dspressa), Miers. Ann. Mag. Nat. Hist. (5), V, p. 14, pi. ii, 



figs. 1—4. 

 1882. Chloridella microphthalma, Haswell, Cat. Australian Crust., p. 207. 



1894. Squilla microphthalma, Bigelow, Proc. U. S. Nat. Mus., XVII, p. 509. 



1895. Chloridella microphthalma, Wood-Mason, Figs, and Desc. of nine Squillidae, p. 8, pi. iv, 



figs. 1—5. 

 1898. Chloridella microphthalma , de Man, Zool. Jahrb. Syst., X, p. 69t, pi. xxxviii, fig. 76, a. 

 1904. Squilla microphthalma, Jurich, Stomatop. deutsch. Tiefsee-Exped., p. 368, pi. xxvi, fig. 1. 



This species and the two following may easily be distinguished from the three 

 preceding by the complete absence of submedian carinae on the first five abdominal 

 somites and by the proportions of the eyes. The latter are decidedly longer than in 

 the species of the latreittei group and the cornea, through narrower than the inflated 

 basal portion of the stalk, is much broader (fig. 17). 



The following appear to be the principal characters of 5. microphthalma : — The 

 dorsal surface of the carapace and abdomen is quite smooth. The carapace, which 

 does not possess median or lateral carinae, bears an extremely closs resemblance to 

 that of 5. latreillei, but is rather narrower in front. The antero-lateral angles are 

 produced as sharp spines. The rostrum is smooth above, as long as, or a trifle longer 

 than wide and its lateral margins which are not upturned meet in an acute but rounded 

 apex. 



The eyes (fig. 17) are narrowly pear-shaped and reach to at least two-thirds the 

 length of the basal segment of the antennular peduncle. The cornea is two- thirds the 

 maximum width of the stalk and its greatest breadth is about one-third the length 

 of the whole organ. The internal margins of the stalk are not distinctly flattened and 

 in juxtaposition as in 5. latreillei. The antennular peduncle is about as long as the 

 carapace, excluding the rostrum. The two basal segments of the antennal endopodite 

 are long, reaching almost to the apex of the scale. The mandibular palp is present and 

 is composed of three segments. 



The raptorial claw is almost precisely similar to that of 5. latreillei, but the ex- 

 ternal margin of the dactylus is very feebly sinuous. The latter segment bears four 

 teeth including the apical one, and in some specimens a very small additional tooth is 

 present, proximal in position and lying close up against the next of the series. 



The last three thoracic somites bear faint intermediate, but no submedian, carinae. 

 The fifth does not possess a pair of inferior spines but is produced laterally to a very 

 short acute point, which is directed almost straight outwards (fig. 18). The lateral 

 margins of the two following somites are broadly rounded ; that of the eighth is 

 produced anteriorly as a rounded lobe. 



