66 Memoirs of the Indian Museum. [Vor,. IV, 



24. Squilla oratoria, de Haan. 

 Plate V, figs. 54-56. 

 844 ? ' Squilla oratoria, De Haan, in Siebold's Fauna Japonica, Crust., atlas, pi. li, fig. 2. 

 845. Squilla affinis, Berthold, Abhandl. Gess. Wiss. Göttingen, III, p. 26, pi. iii, figs. 1 — 2. 

 849. Squilla oratoria, De Haan, in Siebold's Fauna Japonica, Crust., p. 223. 

 880. Squilla nepa, Miers, Ann. Mag. Nat. Hist. (5), V, p, 25 {partim). 

 886. Squilla nepa, Brooks, Voy. H.MS. 'Challenger,' XVI, Stomatop., p. 25. 

 893. Squilla affinis, Pocock, Ann. Mag. Nat. Hist. (6), XI, p. 474 {partim). 

 893. Squilla affinis, Bigelow, John Hopkins Univ. Cric, No. 106, p. 102. 



. Squilla affinis, Bigelow, Proc. U. S. Nat. Mus., XVII, p. 538, fig. 22. 

 907. Chloridella affinis, de Man, Trans. Linn. Soc. Zool. (2), IX, p. 439. 

 . Squilla oratoria, Stebbing, Ann. S. African Mus., VI, pp. 44, 45. 

 Squilla mauritiana , Wood-Mason, MS. 

 1908. Squilla ovatoria, Lloyd, Rec. Ind. Mus , II, p. 33. 



The identity of the specimens recorded in the following papers is uncertain ; some 

 very probably belong to one or other of the new forms described below : — 

 1865. Squilla oratoria, Heller, Reise * Novara' Exped., Crust., p. 124. 



1898. Squilla affinis, de Man, Zool. Jahrb., Syst. X, p. 693. 



1899. Squilla affinis, Nobili, Ann. Mus. Civ Genova, (2), XX, p. 275. 



1900. Squilla affinis, Nobili, Ann. Mus. Civ. Genova, (2), XX, p. 519. 



1901. Squilla affinis, Nobili, Boll. Mus. Torino, XVI, No. 397, p. 14. 



1902. Squilla affinis, de Man, Abhandl. Senck. Ges. Frankfurt, XXV, p. 911. 



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

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



Squilla oratoria along with its variety per pensa and the allied species inter rupta , 

 wood-masoni , stridulans and massavensis form a very compact group ; all may be sepa- 

 rated at a glance from 5. foveolata, nepa and holoschista by the large eyes, the cornea of 

 which is set very obliquely on the stalk. 



The special characters by which 5. oratoria is distinguished from the other closely 

 allied forms are : — 



1. The dorsal surface of the carapace and abdomen is strongly punctate and 



never presents a polished appearance. 



2. The median carina of the carapace is sharp and distinct throughout its course 



and is bifurcated in front for only about one quarter its length anterior to 

 the cervical groove (fig. 54). 



3. The breadth of the carapace measured behind the antero-lateral angles is less 



than half its length, including the rostrum. 



4. The rostrum is subquadrate and its lateral margins, which are not infrequently 



upturned, are slightly convergent anteriorly. 



1 I am not certain of the exact date when the atlas to the Fauna Japonica was published (in the 

 copy consulted the plates are bound up with the text and are undated), but I have accepted Stebbing's 

 statement (1908) that, as De Haan himself contended in 1849, it antedates Berthold's paper. 



