REPORT ON THE AMPHIPODA. 1571 



Fourth Perzeopods. — The first joint longer than that of the third perseopods, widest 

 above, with narrowly rounded apex, within and a little above which the small second 

 joint is embedded ; the third joint as long as the three following together, the produced 

 apex of the inner surface being about half the width of the joint at its base and less than 

 half the length of the following joint ; the retroverted teeth of the front margin are 

 graduated in size, the largest being within one or two of the small apical tooth ; the 

 fourth joint is oval, longer than the two following together, almost as broad as the third 

 and pectinate like it, except that the channelled distal part of the front margin is free 

 from teeth ; the fifth joint about half the length of the fourth and not a third of its 

 breadth ; the finger scarcely half as long or as broad as the fifth joint, straight, not 

 acute ; the last five joints are together much shorter than the first. 



Fifth Peraeopods. — First joint about three times as long as broad, seemingly with 

 both margins a little sinuous, the terminal appendage small, not well observed. 



Pleopods as in the preceding species. 



Uropods. — Peduncles of the first pair a little longer than the rami, the apex of the 

 inner margin a Uttle produced, the lower half of the outer closely pectinate ; the rami 

 as in the preceding species ; peduncles of the second pair fully as long as the rami, 

 shorter and much narrower than those of the first pair, with the lower part of the inner 

 margin pectinate ; the rami pectinate as in the preceding species, the inner very slightly 

 the shorter, not at all coalesced with the peduncle ; the third pair as in the preceding- 

 species, but a small indent on the inner margin marking the point of coalescence between 

 the ramus and peduncle. 



Telson as in the preceding species, but scarcely so long compared with the third 

 uropods. 



Length, one-tenth of an inch. 



Locality. — Station 351, April 12, 1876; Atlantic, off coast of Africa ; lat. 9° 9' N., 

 long. 16° 41' W. ; surface; surface temperature, 81°"8. One specimen, female. 



Remarks. — The species is named as a mark of respect to Mr. W. E. Hoyle of the 

 Challenger Office, who has seen a large part of this Report through the press. From 

 Paralycsea newtoniana, Bovallius, which also has the inner ramus of the second uropods 

 free, this species is distinguished at once by the process to the third joint of the fourth 

 peraeopods. 



