928 CRUSTACEA. 



Plate 63, fig. 2 a, animal, enlarged; b, superior antenna; c, part of 

 flagellum of same towards extremity ; d, e, mandible ; /, inner max- 

 illa; g, maxillipeds; li, part of leg of first pair; i t ibid, of third pair. 



Collected at Hermite Island, by Lieutenant Case. 



Length, four to five lines. Head longer than next segment, ante- 

 rior margin of head in upper view, with a low angle at centre ; four 

 anterior epimerals on either side rounded. The first joint of base of 

 superior antennae is slightly the longest, and the third shortest ; the 

 flagellum is about two-thirds as long as the flagellum of the other 

 pair. The joints of the flagellum are very short and prominent, those 

 towards the base transverse, and those towards the extremity oblong. 

 The hand of first pair is about twice as long as the carpus. The first 

 joint of seventh pair has the posterior apex acute ; the same in the 

 preceding two pairs is obtuse. 



The third pair of stylets extends backward, much beyond the 

 second, and somewhat beyond the first pair; the two branches are 

 similar and acuminate. The caudal segment is oblong and deeply 

 cleft. 



Amphiihoe (Iphimedia) simplex, Dana, Proc. Anier. Acad. Sci., Boston, ii. 217. 



Iphimedia nodosa. 



Oculi rotundati. Corpus crassiusculum, testd subcalcared, fronte minute 

 rostrato, abdomine sabcarinato. Segrnenta thoracis 4 antica mavgini- 

 bus Integra, bta postice sinuosa et sequentia paulo dentata. Abdominis 

 tria segrnenta dorso dentata et latere sparsim acute nodosa, sequentia 

 nuda. Epimerce tres anticos iiitegrce, obtusoe, quarto, lata, postice 

 birdentata, tria sequentia brevia et postice acuta. Articulus pedum sex 

 posticorum primus subguadratus, et postice unidentatus, angulo pos- 

 tico acutus. Antenna? inferiores longiores, dimidio corporis breviores. 

 Pedes nudi; 4 antici parvuli, manibus primis secundisque minutis ; 4 

 sequentes paulo majores ; 6 reliqui parce longiores, subwqui, articulo 

 tertix) triangulato, apice postico producto et acuto. 



Eyes round. Body rather stout, shell subcalcareous, front with a 



