112 



position are without an hiatus, and are evenly but sparingly 

 denticulate. 



The ambulatory legs are smooth, short, and quite glab- 

 rous, the dactyli are stiliform and ridged, they are longer 

 than the propodi except on the last pair, the carpi are without 

 external sulci. 



The pleon in the female is 7-jointed, the terminal joint 

 strongly arcuate on its distal margin. 



A small species, equal in size to L. hiapinosa. 



Dredged by Dr. Verco, St. Vincent's Gulf. 



Type (one female). 



Family Pinnoterid^. 



Sub-family Hymenosomin^. 



Genus Elamena, M.-Edw. 



Elamena truncata, Stimpson. 



PI. ii., figs. 2 2a, 2h, 2c, 2d. 



Trigonoplax truncatus, Stimpson, Proc. Acad. Nat. Sci. 

 Philad.; 1858, p. 109. 



Elamena truncata, Alcock, Jnl. Asiatic Soc. Bengal, 

 Ixix., ii., p. 386, 1900. 



Elamena truncata, A. M.-Edw., Nouv. Archiv. du Mus., 

 ix., 1873, p. 323. 



Elamena truncata, J. R. Henderson, Trans. Lin. Soc. 

 Zool. (2), v., 1893, p. 395. 



Body almost totally glabrous and*smooth. 



Carapace sub-orbicular in outline, as broad as long, from 

 slightly convex to depressed, with the margins raised or accen- 

 tuated ; the regions ill-defined. The lateral angles are 

 slightly prominent, but not spined, the antero-lateral margins 

 with slight prominences about the middle. Postero-lateral 

 margins with a slight insinuation above the last pair of legs. 

 Front prominent, about one-fourth the width of the carapace, 

 the margin straight with rounded ends, sometimes showing 

 from above a median slight prominence; below it a laterally- 

 compressed triangular keel reaches its apex just anteriorly to 

 the antennules, and forms a strong septum between them. 



The orbits are shallow, totally concealed beneath the cara- 

 pace, they are near each other and not separated from the fos- 

 settes. The ocular peduncles are short, thickened proximally, 

 and do not reach the margin of the carapace. 



The antennules are small. 



The antennae are slender and short, not reaching the mar- 

 gin of the carapace, they have the first joint very short, the 

 second long, the third shorter than the second ; the flagellum 

 is very small. 



