1913. ] S. Kemp: Crustacea Stomatopoda of the Indo-Pacific Region. Ey 
1849. Squilia, sect. Raphideae, De Haan, in Siebold’s Fauna Japonica, Crust., p. 221. 
1852. Sqguilla, Dana, U.S. Explor. Exped., Crust., p. 618. 
1880. Squilla, Miers, Ann. Mag. Nat. Hist. (5), V, p. 16. 
1880. Chloridella, Miers, ibid., p. 13. 
1880. Leptosquilla, Miers, tbid., p. 12. 
1886. Squilla, Brooks, Voy. H. M. S. ‘ Challenger,’ XVI, Stomatop., p. 23. 
1890. Pterygosquilla, Hilgendorf, Sitz.-ber. Ges. naturf. Freunde, Jahrg. 1890, pp. 172, 187. 
1894. Sqwilla, Bigelow, Proc. U. S. Nat. Mus., XVII, p. 509. 
1894. Pterygosquilla, Bigelow, ibid., p. 492. 
1894. Leptosquilla, Bigelow, ibid., p. 492. 
1895. Squilla, Hansen, Isop., Cumac. u. Stomatop., Plankton-Exped., p. 69. 
1903. Chloridélla,| Rathbun, Proc. U. S. Nat. Mus., XXVI, p. 54. 
tg10. Squilla, Stebbing, Ann. S. African Mus., VI, p. 405. 
Carapace narrower in front than behind, with conspicuous gastric and cervical 
grooves, the latter sharp and continuous across mid-dorsal area ; longitudinal carinae 
usually distinct, never wholly absent ; antero-lateral angles usually spinous. Cornea of 
eyes bilobed. Mandibular palp three-segmented or wholly absent. Merus of raptorial 
claw articulating terminally with ischium ; ventral surface of merus longitudinally 
hollowed throughout its length ; upper margin of propodus finely pectinate, or (more ~ 
rarely) with a series of long stiff spines ; dactylus not inflated at base,armed with teeth 
on inner margin. Shorter ramus of last three thoracic appéudages unjointed, or with 
an imperfect suture separating short basal and long lineafdistal parts. -Free thoracic 
and abdominal somites depressed, with distinct longitudirigl carinae. Telson of good 
length, with a median carina, and smooth, pitted, tuberculatQor Carinate on either side. 
Distal margin with three pairs of large teeth, submedians oc\asionally with movable 
tips ; one or more submedian denticles, several (always more \han four) intermediate 
and one lateral. Ventral process of uropods terminating in tWo sharp spines, inner 
longer than outer and nearly always bearing a small lobe on its external margin. 
Well-marked secondary sexual distinctions occur in some species. The modifica- 
tions, which are found only in the adult male, affect the structure of the raptorial 
claw or the development of the carinae of the abdominal somite and telson. 
Miers estimate distinct genus under the name Chloridella, comprising those 
species which possess very small eyes ; but Brooks has shown that these forms are 
linked to the more typical representatives of the genus by such species as S. data and 
S. fasciata. Hansen regards Hilgendorf’s Pterygosquilla as a synonym of Sguilla and 
identifies P. laticauda, the only known species of the former genus, with the earlier 
Squilla gracilipes of Miers. Leptosqualla appears to be founded only on a late post- 
larval stage, and, although it cannot be identified with any known adult form, there 
is little doubt that it may safely be referred to this genus. 
Squilla, as has already been mentioned, is the oldest established genus of Stomato- 
poda at present living and probably contains the most primitive species of the order ; 
' Miss Rathbun considers that the name Sguilia is preoccupied, but this view is not accepted by 
* Stebbing (gro). 
