1 1 8 Memoirs of the Indian Museum. [Vol. IV, 



5. Lysiosquilla spinosa (Wood-Mason). 

 Plate VIII, fig. 94. 

 1847. Coronis tricarinata, Gray MS., White, List. Crust. Brit. Mus., p. 85 {sine desc). 

 1875. Coronis spinosa, Wood-Mason, Proc. As. Soc. Bengal, p. 232 ; reprinted in Ann. Mag. Nat. 

 Hist. (4) XVII, p. 263 (1876). 



1878. S quitta indefensa, Kirk, Ann. Mag. Nat. Hist. (5), II, p. 466. 



1879. Squilla indefensa, Kirk, Trans. N. Zealand Inst., XI ; p. 394 (text-fig.) and p. 401. 



1879. Squilla laevis, Hutton {non Hess), Trans. N. Zealand Inst., XL, p. 340. 



1880. Lysiosquilla spinosa, Miers, Ann. Mag. Nat. Hist. (5), V, pp. 12, 125, pi. i, figs. 10-12. 

 1882. Squilla tridentata, Thomson, Trans. N. Zealand Inst., XIV, p. 230. 



1886. Squilla indefensa, Fihol, Miss, de l'île Campbell, III, 2e, p. 436, pi. lv, fig. 3. 1 



1886. Squilla laevis, Filhol, ibid. p. 491. 



1891. Lysiosquilla spinosa, Chilton, Trans. N. Zealand Inst., XXIII, p. 61, pi. x, figs. 1-3. 



1894. Lysiosquilla spinosa, Bigelow, Proc. U.S. Nat. Mus., XVII, p. 503. 



1894. Lysiosquilla (?) tridentata, Bigelow, ibid. p. 503. 



1895. Lysiosquilla spinosa, Wood-Mason, Figs, and Desc. of nine Squillidae, p. 1, pi. i, figs.1-3. 

 1901. Lysiosquilla spinosa, Manchester, Proc. Zool. Soc, II, p. 554. 



1909. Lysiosquilla spinosa, Chilton, in Subantarctic Is. of N. Zealand, II, p. 615. 



1910. Lysiosquilla spinosa, Chilton, Trans. N. Zealand Inst., XLHL p. 139. 



The carapace and abdomen are smooth and polished dorsally and the former is con- 

 siderably wider posteriorly than anteriorly. The gastric grooves are distinct through- 

 out their course and the cervical is represented by a short transverse depression on 

 either side as in L. maculata. The antero- and postero-lateral angles are broadly 

 rounded and the posterior margin is deeply concave. The rostrum is perfectly smooth 

 dorsally ; it is a little broader than long and its strongly convex lateral margins con- 

 verge to a small but acute apex. 



The corneal portion of the eyes is a trifle wider than the stalk, not bilobed, and the 

 corneal and peduncular axes are slightly oblique with regard to one another. The 

 anterior margin of the ophthalmic somite is truncate but, in dorsal view, is entirely 

 concealed by the rostrum. The dorsal processes of the somite are for the same reason 

 quite invisible. The antennular peduncle is less than one and a half times the 

 length of the carapace, excluding the rostrum. The dorsal processes of the antennular 

 somite are acute and reach to the base of the eyestalks. The mandibular palp is com- 

 posed of three segments. 



The outer inferior margin of the merus of the raptorial claw is subrectangular, but 

 rounded distally. The dorsal edge of the carpus is not carinate but its upper margin 

 ends in a sharp spine overhanging the propodal articulation. There are three movable 

 spines at the base of the pectinate edge of the propodus. The dactylus is sinuous ex- 

 ternally with a very small outstanding proximal lobe. It bears from nine to fourteen 

 teeth * (including the terminal one) which increase regularly in size from the base to the 

 apex. 



1 A bad reproduction of Kirk's rough text-figure. 



% Of the two specimens examined, the type hasten spines, while the other has ten on one side and 

 eleven on the other. The type of Thomson's S. tridentata has only four teeth on the raptorial dactylus; 

 but the specimen is exceedingly small; only 75 inches in length. 



