16 ON CRUSTACEANS FROM MAURITIUS. [Jan. 15, 



small spine ; the postero-lateral angles are not acute in any of the 

 segments ; the terminal segment is obscurely longitudinally sulcated 

 above, and is shorter than the rhipidura or appendages of the 

 penultimate segment ; it is acute at its distal extremity, and bears a 

 pair of lateral spinules at some distance behind the apex. The 

 antennules have the peduncle dorsally flattened and excavate for the 

 reception of the eyes, the terminal joint is very short, the flagella 

 stout, tapering very slightly, longer than the carapace, and the 

 outer longitudinally concave for the reception of the inner flagellum, 

 as in other species of the genus ; the scaphocerite of the antennae is 

 slightly longer than the peduncle of the antennules, it narrows some- 

 what to the rounded distal extremity, and bears a small subterminal 

 spine on its outer margin ; the flagellum is wanting. The outer maxil- 

 lipedes are slender and reach beyond the apex of the antennal scale. 

 The legs of the first three pairs increase successively in length, they 

 present nothing remarkable : the chelae are very slender, with the 

 fingers longer than the palm ; the fourth pair have the merus-joints 

 somewhat thickened, fifth and sixth joints not elongated, dactyli 

 shorter than the sixth joint. The fifth legs are much longer than 

 the carapace; fourth, fifth, and sixth joints all slender and much 

 elongated ; dactylus less than half the length of the carapace, and 

 little more than half the length of the penultimate joint, and 

 slightly compressed ; the rami of the rhipidura are narrow, the 

 outer longer than the inner, with a straight outer margin, the inner 

 narrow-ovate. 



lines. millim. 



2 ■ Length of body about 15 32 



Length of fifth legs about 12 25 



Leptosouilla schmeltzii. 



Squilla schmeltzii, A. Milne-Edwards, Journ. d. Mus. Godeffrov, 

 i. (Heft 4), p. 87, pi. ii. fig. 7 (1873). 



Leptosquilla schmeltzii, Miers, Ann. & Mag. Nat. Hist. (ser. 5), 

 v. p. 13 (1880). 



A small male of this species, hitherto unrepresented in the collection 

 of the Museum, agrees in almost all particulars with the description 

 and figure of Milne-Edwards, whose type was from Upolu. There 

 can, I think, be no question of the generic distinctness of this form 

 from the typical Squilla. 



The median rounded keel of the terminal segment is more 

 strongly developed, and the dactyli of the raptorial limbs are six- 

 spined as in the figure cited, not seven-spined as in the description. 



Gonodactylus trachurus. (Plate I. fig. 3.) 



Gonodactylus trachurus, V. Martens, Sitzungsber d. Gesellschaft. 

 naturforschender Freunde zu Berlin (no. 6), p. 93 (1881). 

 An adult male is in the collection. 

 This species is evidently very nearly allied to Gonodactylus bradyi 1 , 



1 Squilla bradyi, A. Milne-Edwards, in ' Les Fonds de la Mer,' by MM. de 

 Folin et Perier, i. (livr. ix.) p. 137, pi. xvii. fig. 11 (1869). 



