GAMMARIDEA. 933 



reaching backward beyond the first, branches of first pair having 

 five rather distinct setae above. 



Plate 63, fig. 6 a, anterior part of body ; b, mandible ; c, part of 

 maxilliped ; d, hand of second pair ; e, third joint of seventh pair \ f, 

 extremity of same pair ; g, caudal extremity. 



Puget's Sound. 



Length, three lines. The hands of the second pair of legs are 

 about as long as the head ; and the finger is about two-thirds the 

 length of the hand. The mandibular palpus is set with longish hairs 

 along the last two joints. The third joint of the posterior legs has 

 three small tufts of very short hairs on the anterior margin (including 

 the apical), and four on the posterior; the setae are not as long as the 

 breadth of the fifth joint. The posterior stylets are quite long ; yet, 

 the second pair extends beyond them, and the first pair beyond the 

 second. The mandibles have a denticulated summit, and an inner 

 denticulated summit lobe, with a prominent crest of setse, and a large 

 molar prominence, which is abruptly elevated on the lower side. 



Genus (EDICERUS, Krdyenr. 



Iphimediae pedibus quatuor anticis, stylis posticis, antennisque superiori- 

 bus affinis. Pedes septimi valde elongati, tenues, fere filiformes. Epi- 

 merce magnitudine mediocres, btce 4dispaulo brevioribus, lobis subcequis. 



Allied to Iphimedia in the four anterior feet, posterior stylets, and 

 the superior antennae. Seventh pair of feet very long and slender, 

 nearly filiform. Epimerals moderately broad, the fifth a little 

 shorter than the fourth, bilobate, the posterior a little smaller than 

 the anterior. 



This genus was instituted by Kroyer with the following charac- 

 teristic, in which some particulars not of generic importance are in- 

 cluded : — 



" Frons in rostrum producta plus minus acutum obtusumve, sem- 

 per vero nodo pellucente, ovali, flavo rubescente turgidum. Oculi 



234 



