368 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 39. 



t. Exopod of first swimming leg with two joints, endopod with three; 

 short digitate processes on the first antennae. 



denticulatus Bassett-Smith, 1898, b. 

 i. Exopod of first swimming leg with one joint, endopod with two; 

 processes on first antennoe with very long spines. 



triceros Bassett-Smith, 1898, a. 

 j. Second free segment swollen and overlapping the third; fifth 

 legs three-jointed; abdomen joints equal. 



parvulus Nordmann, 1832. 

 j. Second free segment not swollen; fifth legs two-jointed; first 

 abdomen joint as long as the other two. 



teres, new species, p. 379. 

 k. Terminal abdomen joint much longer than either of the other 

 two; the setae on the claw of the maxillipeds widely sepa- 

 rated onod T. Scott, 1902. 



Jc. Basal abdomen joint considerably the longest; the setse on 

 the claw of the maxillipeds close together. 



zeugopteri T. Scott, 1902. 

 I. Exopod of first swimming leg two-jointed, endopod three- 

 jointed m. 



I. Both rami of the first swimming legs three- jointed, neither 



ramus widened n. 



m. Second joint of maxillipeds very email, only one-eighth 

 the length of the basal joint; terminal claw longer than 

 both joints, and coarsely toothed along the entire inner 



margin solex Claus, 1864, p. 376. 



m. Second joint of the maxillipeds swollen to three or four 

 times the size of the basal joint; terminal claw about 

 the length of the second joint, slender and finely 

 toothed along the inner margin. 



condnnus, new species, p. 371. 

 n. Second joint of maxillipeds twice as long as wide, nar- 

 rower than the basal joint; terminal claw coarsely 

 toothed, with two stout spines at its base. 



onosiT. Scott, 1902. 

 n. Second joint of maxillipeds enlarged and flattened, 

 much wider than the basal joint; terminal claw 

 finely toothed, with a single bristle at its base. 



megaceros Heller, 1865. 



BOMOLOCHUS EMINENS, new species, 



Plate 53, text figure 6. 



Female. — General body form long and slender; cephalothorax 

 transversely elliptical, three-fifths wider than long, with strongly pro- 

 jecting lateral margins. Anteriorly the carapace projects over the 

 first antennae so as to entirely conceal them in dorsal view, except the 

 very tips of the setae with which they are armed . From the center of 

 the anterior margin an almost circular lamina projects like a rostrum. 



Second, third, fourth, and fifth segments diminishing regularly in 

 width, the fifth segment three-eighths the width of the carapace. The 

 respective lengths of the carapace and the four free segments are rep- 



