Two new Ainphipods from tlie West Indies. 401 



fourth and iifth joints are equal to one another, and eacli is 

 longer than the small two-jointed flagelluni. 



Mandibles.— The cutting-edge and secondary plate denticu- 

 late, tiie spine-row containing apparently not more than three 

 spineSj the molar tubercle prominent. The palp slight in 

 structure, with the first joint not much shorter than the 

 second and longer than the third, the third carrying only two 

 or three short apical seta3. 



Lower Lip. — The inner lobes comparatively large, the 

 outer widely separated, the mandibular processes small. 



Ftrst Maxillce. — No distinct inner plate, the outer plate 

 armed with five spines ; the palp two-jointed, the large second 

 joint carrying four setge on its distal margin. 



Second Maxillce. — The inner and outer plates each distally 

 armed with three spines, the inner having an additional one 

 on its inner margin. 



Maxillipeds. — The inner plates rather small, tipped with a 

 few setse, the outer plates reaching halfway along the second 

 joint of the palp, and armed with two spines on the apex and 

 two on the inner margin. The second joint of the palp the 

 longest, the third ending in the pointed process which Mayer 

 mentions as being found in several genera. The figure which 

 ]\layer gives of the maxilliped of his Deutella venenosa would 

 serve for that of the present species. 



First Ofiathopods. — These are attached so far forward that 

 the base of the maxillipeds appears behind them. The short 

 wrist lies beside the fourth joint, which, as usual, to use 

 Spence Bate's expression, underrides it. The hand is some- 

 what triangular, broadest at the base. The finger curves 

 over the whole elongate palm and is pectinate within. In 

 the larger specimens the finger, at least in the oblique view, 

 appears to be to a trifling degree sinuous. 



Second GnatJiopods. — The second joint is equal in length 

 to the hand ; the third is rather longer than the fourth ; the 

 fifth is of insignificant size and coalescent with the large 

 hand, which has at the base a backward directed process 

 surmounted by a spine and one or two setules. The long 

 front margin is very convex. In the female the hind margin 

 is also convex, the long finger curving over it as far as the 

 hollow formed between it and the above-mentioned process. 

 In the male the hind margin is slightly concave, distally 

 forming a small sharp tooth and ending squarely between 

 this tooth and the hinge of the finger. 



First and Second Perceopods. — The minute rudimentary 

 limbs lie close to the bases of the branchial vesicles. The 

 second joint of the limb is scarcely a third of the length of 



