BORRADAILE—STOMATOPODA. 211 
2. Five long keels on the telson (not including those of the edges). 
i. Sutures at the sides of the abdominal segments . . . . . G. yraphurus, Miers, 1875. 
ii. No sutures at the sides of the abdominal segments . . . . G. glaber, Brooks, 1886. 
Key to the Varieties of G. chiragra. 
I. At the hinder end of the middle keel a smaller ridge is present on each side. 
1. The ridges are almost or quite independent of the middle keel, and run forwards parallel with it for 
some distance. ach of them usually ends in a spine behind.—Var. H. affinis, de Man, 1902 
(=segregatus, Lanchester, 1903). 
2. The ridges are connected at their hinder ends with the middle keel so as to form an anchor-shaped 
structure. They are usually short and divergent. They do not bear spines. 
i. Keels of sixth abdominal segment and telson compressed. Keels of sixth abdominal segment 
produced without constriction into long spines. Middle keel of telson ends in a spine. 
Var. D. smithi, Pocock, 1893. 
ii. Keels of sixth abdominal segment and telson rounded, not produced without constriction into 
spines. Middle keel of telson rarely carries a spine.—Var. A. incipiens, Lanchester, 1903 (type). 
II. The small ridges above mentioned are wanting. 
1. The outer teeth of the telson-edge are present. 
i. The middle keel of the telson is much broader than the others and has one knob or spine or none 
at the hinder end.— Var. B. anaucyrus, Borr., 1900. 
ii. The middle keel of the telson is much broader than the others and has three spines at the hinder 
end.—Var. K. confinis, de Man, 1902. 
2. The outer teeth of the telson are wanting or very faintly indicated. 
i. Keels of telson narrow, with steep sides.—Var. G. acutus, Lanchester, 1903. 
ii. Keels of telson very broad, swollen, and rounded.—Var. F'. tumidus, Lanchester, 1903. 
Key to the Varieties of G. glaber [sphalm. glabrous]. 
I. Keels narrow or of moderate width, not touching one another. Spines always present at the ends of 
the three middle keels of the telson, and generally overhang the bases of the keels. (When the 
spines are short and blunt they are often broken.)—Var. A. ternatensis, de Man, 1902 (=¢ernatensis, 
de Man, +glaber, type, de Man,=mutatus, Lanchester, + glaber (pars), Lanchester). 
II. Keels broad and swollen so as to touch one another. The spines of the three middle keels of the 
telson are obsolete and often no trace of them remains.—Var. rotundus, nov. (=glaber (pars), 
Lanchester) . 
3. Gonodactylus fimbriatus, Lenz, 1905. 
Lenz, Abh. Senck. Ges. xxvii. p. 388, pl. 47. fig. 11. 
Specimens from Coetivy, Seychelles. 
4. Gonodactylus chiragra (Fabr.), 1793. 
Squilla chiragra, Fabricius, Ent. Syst. iii. i. p. 513 (1793). 
Gonodactylus chiragra, Latreille, Encycl. Méth. x. p. 473 (1825) ; Miers, Ann. Mag. Nat. Hist. (5) 
v. p. 118 (1880) ; de Man, Zool. Jahrb. x. Syst. p. 694, pl. 38. fig. 77 (1898); Abh. Senck. 
Ges. xxv. ili. p. 912, pl. 27. fig. 66; Borradaile, P. Z. S. 1898, p. 34, pl. 5. fig. 4 & pl. 6. 
fig. 8; Willey’s Zool. Results, iv. p. 400 (1900); Lanchester, Gardiner’s ‘Fauna of the 
Maldives,’ i. p. 444, pl. 23 (1903), in part. 
Gonodactylus smithii, Pocock, Ann. Mag. Nat. Hist. (6) xi. p. 475, pl. 20 8. fig. 1 (1893). 
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