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PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXV. 



Mandibles closely resembling those of the preceding species, but 

 having the last joint of the palp longer than the two preceding ones 

 combined. Inner lobes of lower lip small but distinct, and rounded 

 in front like the outer ones; posterior angles moderately produced 

 and rounded. First maxillae resembling very closely those of the 

 preceding species, the inner plate with a single large seta ; outer plate 

 with nine spines; palp with the first joint about twice as long as wide. 

 Second maxilla 1 with the plates oblong, subequal, and setose only 

 around the distal margin. Maxillipeds with the inner plates armed 

 distally with three spines; outer plate relatively longer and more nar- 

 rowed distally than in natatory and reaching the posterior third of 

 the second joint of the very large palp. 



Fig. 35. — Gracilifes distincta, female, tjn,, second gnathofod; l.l, lower lip; I 



mil, MANDIBLE - , p 2 , SECOND PER.EOPOD ; t, TELSON ; UTs, THIRD UROPOD. 



First gnathopods with the side plate rounded in front; basal joint 

 with a prominence bearing several long setae on the inner surface I 

 near the anteroinferior angle; carpus with a narrow setose posterior I 

 lobe; hand large, narrowly oval, palm extending over most of the I 

 posterior margin, furnished with stout seta 1 and having three spines I 

 above the upper end, which diminish in size toward the base of the I 

 hands; inner surface near these spines armed with a small group of I 

 spines. Second gnathopods a little larger than the first; side plate) 

 not produced anteriorly ; basal joint with a setose prominence near the j 

 lower end, as in the first pair; carpus with a prominent posterior lobel 

 which is longer and narrower than in the first gnathopods; handl 



