REPORT ON THE AMPHIPODA. 1109 



Norman, as in the new species Podoceropsis kermadeci, there is a rudiment of a secondary 

 flagellum on the upper antennae, and the presence of this might be noted among the 

 generic characteristics ; in the neighbouring genus Gammaropsis, the secondary flagellum 

 is far from rudimentary. 



Podoceropsis kermadeci, n. sp. (PI. CXVI.). 



Rostrum small, lateral lobes of the head acute, not very prominent ; the head and 

 perseon -segments hairy to a certain extent. 



No Eyes perceived. 



Upper Antennse. — First joint elongate, with nine groups of slender spines on the 

 lower margin, the longest at the apex, and five groups on or near the upper margin ; 

 the second joint thinner, a little longer, similarly furnished, but with the spines on the 

 lower margin longer ; the third joint thinner than the second, very little shorter than 

 the first, with eight groups of long spines on the lower margin, four or five on the 

 upper ; the flagellum of six joints, together scarcely longer than the second of the 

 peduncle, the first as long as the three following united, and with three groups of long 

 spines and one of spinules on the lower margin, the fifth joint short, conical, and the 

 sixth minute, all having long apical spines. There is a mere rudiment of a secondary 

 flagellum, with two apical setules. Some of the long spines are distally very finely 

 pectinate. 



Lower Antennas shorter than the upper, the first and second joints short, placed 

 behind and below the lateral lobes of the head, the gland-cone small, but acute, 

 decurrent ; the third joint longer than the preceding two united, distally a little 

 dilated, with spines along the lower margin and at the apex of the upper ; the fourth 

 joint elongate and furnished like the second of the upper antennae ; the fifth joint 

 resembling the third of the upper antennae ; the flagellum of five joints, together 

 scarcely longer than the fifth joint of the peduncle, the first joint carrying several long 

 spines, its length exceeding that of the other four united, the last two and especially 

 the last being very small, all carrying spines that are long, very slender, some pectinate. 



Upper Lip. — The broad distal margin gently and almost symmetrically emar- 

 ginate, faintly cUiated. 



Mandibles very small compared with the length of the palp. The cutting edge 

 divided into six unequal teeth, the three at the top and the lowest small, the other two 

 rather large. The secondary plate on the left mandible rather broad, with an edge of 

 five teeth, the lowest the largest ; the secondary plate on the right mandible feebler, 

 with two rather long and sharp teeth and some lateral denticles ; in the spine-row there 

 are on the left mandible three, on the right two, curved denticulate spines ; the molar 

 tubercle is very prominent, narrowed at the crown, of which the denticles are small and 



