BORB.ADAILE— ON CARIDES FROM THE WESTERN INDIAN OCEAN 



403 



IS 



by the following combination of features : the rostrum reaches well beyond the eyes, but 

 ends just before the middle of the second joint in the antennular stalks. Its formula 

 ■-, the lower teeth being small, but larger than in L. chiltoni, and the hinder of 

 them standing below the last upper tooth. The pterygostomial angle is rectangular 

 and usually produced into a spinule. The thick fiagellum of the antennule is fused 

 to the slender one for half its own length. The antennal scale curves gently outwards 

 and narrows slightly towards the end, which is truncate and distinctly outreached by 

 the distal spine, the first leg slightly outreaches the scale but falls considerably short 

 of the end of the third maxilliped. The wrist joint is as long as, usually a trifle 

 longer than, the chela. The second legs are equal or unequal. The longer of the pair 

 outreaches the antennal scale by rather less than the whole wrist. The latter has 

 24 — 25 joints. There are double tips to the fingers. The walking legs have spinules 

 below the meropodites. The first outreaches the antennal scale by the dactyle and 

 nearly the whole propodite, the second by the propodite only, and the third falls a 

 little short of the end of the scale. 



Length of the longest specimen 31 mm. 



Specimens were taken in Minikoi, Peros Banhos, Salomon, and the Seychelles. 



Genus HiPPOLYSMATA. 



14. Hippolysmata vitatta Stimpson, 1860. 



Proc. Acad. Philadelphia, 1860, p. 26. de Man, Trans. Linn. Soc. London, (2) Zool. 

 ix. p. 423 (1907). Kemp, Kec. Ind. Mus. x. p. 113 (1914). 



Specimens were taken at Cargados Carajos in 30 fathoms, and in the Seychelles 



I in 34 fathoms. 

 I 15. Hippolysmata kukenthali (de Man), 1902. 

 I Merhippolyte orientalis, de Man {nee Bate), Weber's Zool. Ergebn. Reise Ost-Ind. 

 ii. p. 407. 



Hippolyte kukenthali, de Man, Abh. Senckenb. Ges. xxv. p. 849, PI. 26, fig. 56 (1902). 

 Hij^polysmata kukenthali, de Man, Trans. Linn. Soc. London, (2) Zool. ix. p. 426 

 (1907). Kemp, Rec. Ind. Mus. x. p. 115 (1914). 



Ten specimens were taken on Egmont Reef, Seychelles. Each has a single tooth on 

 the underside of the rostrum, and 14 or 15 joints in the wrists of the second legs. 



Genus Lysmatella. 



Borradaile, Ann. Mag. Nat. Hist. (8), xv. p. '206 (1915). 



The collection contains three specimens of a new species which would, have to 

 be placed in the genus Hippolysmata, were it not for the absence of epipodites from 

 the legs. In view of this somewhat important difference I have thought it best to 

 establish for this species a new genus Lysmatella. 



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