370 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 39. 



Tlie second, third, and fourth legs each have a three-jointed endopod 

 and a four-jointed exopod, the two terminal joints of the latter more 

 or less fused. All the swimmincy legs stand out prominently in dorsal 

 view; the tips of the rami of the first pair and the entire rami and 

 most of the basal joints of the other pairs are plainly visible. The 

 arrangement of the spines and setae is as follows: Second exopod, 

 I-O; I-l; I-l; II-3: endopod, 0-0; 0-1; 1-3: third exopod, II-O; 

 I-l; I-l; 1-4: endopod, 0-1; 0-1; 1-2: fourth exopod, I-O; I-l; 

 1-2; II-2: endopod, 0-1; 0-1; 1-2. Fifth legs composed of a single 

 broad and spatulate joint, two-thirds as long as the genital segment 

 and tipped with three setge, the middle one longer than the other two. 



Color (preserved material) a light gray, becoming thick and opaque 

 on the dorsal surface. 



Total length, 2.75 mm. Carapace, 0.85 mm. long, 1.25 mm. wide. 

 Free thorax, 1.34 mm. long. Egg-strings, 1.75 mm. long, 0.50 mm. 

 wide. 



(eminens, eminent, notable, in the sense of being well distinguished 

 from other species.) 



There is a single lot of this species, numbered 38638, U.S.N.M., and 

 consisting of two females, both of which carry fully formed egg- 

 strings. They were taken from the gill cavity of the false Spanish 

 sardine, Clupanodon fseudoliispanicus, at the Tortuga Islands, by 

 Dr. Edwin Linton. 



In spite of the poverty of specimens the species stands out in 

 marked contrast to all others in the following particulars: 



1. General body form; the comparatively small size of the carapace 

 and the length of the free thorax segments. 



2. The prominence of the swimming legs; not merely the rami but 

 the most of the basal joints are visible in dorsal view. 



3. The peculiar fusion of the last two joints of the exopod in the 

 second, third, and fourth legs. 



4. The size of the maxillipeds, their position so far outside the other 

 mouth-parts, and the fact that their basal joints are visible for their 

 entire length. 



This last characteristic is of great importance since, in connection 

 with the developmental stage to be described later (see p. 373), it com- 

 pletely proves the identity of these appendages as maxillipeds. 



In other species these basal joints are so thoroughly fused with the 

 ventral surface of the head that they are indistinguishable, and only 

 the second joint and terminal claw are visible. The position of these 

 last two joints is not such as to suggest that they belong to the max- 

 illipeds, and hence much confusion has arisen with reference to them. 

 But here w& have the entire appendage visible and there can be no 

 question of its identity. 



