94 Rccurds of the hidian Mifst'niii. [Voh. VI. 



small plates with rectangular antero-lateral angles ; in 6'. pidchellus 

 these angles are narrow and acute and are produced obliquely 

 outwards. The distal margin of the telson is in both species 

 divided into four lobes on either side of the median line^ but these 

 in G. ncfandus are merely bounded by grooves on the dorsal 

 surface whereas in G. pidchellus they are separated by three 

 incisions, cut right through the telson, which extend about half 

 way to the outer of the three dorsal boss-like protuberances. 



A number of specimens, the largest 39 mm. in length, from tht- 

 Andamans, Cheduba (Arrakan Coast) and the vStraits of Malacca. 



Odontodactylus southwelli, sp. nov. 



Odontodactylus southwelli is related to 0. hanscui, Pocock, 

 and 0. latirostris, Borradaile, and, as in those species, the anterior 

 half of the telson bears three carinae on either side between the 

 median crest and the thickened lateral margin. The outermost 

 of these three carinae is parallel to the external margin and does 

 not diverge to the apex of the lateral spine as in 0. japonicus. 

 From all species with more than three teeth on the inner margin 

 of the dactylus of the raptorial claw it ma3^ be distinguished at 

 a- glance by the enormous size of the eyes. 



The rostrum is twice as broad as long and the anterior margin 

 is evenly rounded from side to side. The breadth of the cornea 

 is contained from two to two and a quarter times in the length of 

 the carapace The dactylus of the raptorial claw bears seven to 

 nine teeth on its inner margin in addition to the terminal one. 

 The lateral margins of the sixth and seventh thoracic somites are 

 rounded, the former being a trifle broader than the latter. There 

 are eight carinae on the dorsal surface of the sixth abdominal 

 somite; the first intermediate carina, which alone does not termi- 

 nate in a spine, is connected proximally by means of a ridge with 

 the submedian. On the margin of the telson there are twelve to 

 sixteen minute submedian spinules, two intermediate denticles 

 and one lateral. In the uropod the outermost of the ten or eleven 

 movable spines which fringe the exopod reaches almost or 

 quite to the apex of the ultimate joint. 



Several specimens, the largest 37 mm. in length, from the 

 Andamans and Ceylon. 



Lysiosquilla insignis, sp. nov. 



This species does not appear to possess much affinity with 

 any form previousl}- described. 



The rostrum is triangular, one and a half times as long as 

 wide, and terminates in a sharply acute apex The cornea is set 

 obliquely on the eyestalk and its breadth is about one third the 

 mid-dorsal length of the carapace. The dactylus of the raptorial 

 claw bears seven or eight teeth including the terminal one, the 

 penultimate tooth, as in L. acanthocarpus, being noticeably 



