AMPHIPODA. 261 



UrDpods: the 1st and 2nd have the inner ramus about twice as long as the outer, 

 both styliform ; the 3rd are wanting. 



Telson entire, concave above, spoon-shaped. 



Length 2 niillinis. 



This curious genus was described by Mr. SlBBBlNG from 2 specimens in the 

 Copenhagen Museum, taken by Dr. H. J. Hansen in the West Indies, and named 

 A. hanseni. Mr. A. Scott, A.L.S., who was kind enough to dissect, mount, and 

 draw the gnathopods of the very small specimen, informs me that there were 2 oral 

 lamina-, Mr. Stebbinu having only observed one. In their general appearance the 

 two species resemble each other, but differ considerably in the structure of the 1st 

 and 2nd gnathopods. I have taken the liberty of naming the present sj)ecies after 

 the distinguished naturalist, to whom all Amphipodists owe a deep debt of gratitude 

 for the invaluable " Challenger " volumes. 



Stenothoe, Dana, 1852. 

 Stenothoe marina (Sp. Bate), var. sinhalensis. 

 Cheval Paar, 1st March, 1902. One female with young. Length 4 millinis. 

 Differs from the type in its larger eye, in having the penultimate joint of the upper 

 antennae produced in an infero-distal tooth ; the flagellum of the lower antennse 

 longer than the peduncle ; and the absence of spines on the telson. 



Stenothoe monoculoides (Mont.). 



Tow-nets, Galle, 7th July, 1U02, 3 specimens ; Cheval Paar, February, 1D03, 

 5 specimens. Length 2 - 5 millims. 



The upper antennse are about one-fourth longer than the lower ; the 3rd joint oi 

 the latter is not longer than the 2nd ; and the telson has 2 pairs of submarginal spines, 

 but in other respects it agrees with G. 0. Sabs' description. 



Stenothoe gallensis, n. sp. Plate III., figs. l'J. 



An abundant species on the Ceylon coast. 



Head scarcely produced in a rostrum. Ocular lobe truncate. Eyes round, rather 

 large. 



Segments of the mesosome increasing in length successively. Posterior angle of 

 the 3rd pleon segment acute. 



Upper antennaj a trifle longer than the lower; 1st and 2nd joints subequal in 

 length, 3rd rather longer than the 1st joint of the flagellum, which has 22 joints in 

 the female. 



Lower antennse: 2nd and 3rd joints subequal ; flagellum longer than the peduncle, 

 18-jointed. 



Mouth organs and maxillipeds as in Stenothoe marina. 



First gnathopods : side-plates small, rounded below ; wrist barely half as long as 

 the hand, otherwise as in S. marina (tig. l'J. gn. 1 ). 



