REPORT ON THE AMPHIPODA. ll>41 



Protellopsis kergueleni, n. sp. (PI. CXLIL). 



The Head smoothly rounded above ; the first segment of the peraeon longer than the 

 head, with a single dorsal upright tooth at the distal end ; the second (first free) segment 

 with two dorsal spines inclining forwards at about the centre, and a single larger and more 

 upright one at the distal end ; the hinder part with its lower margin overlapping the base 

 of the nest segment ; the third segment rather longer than the second, having at the 

 distal end a tooth broader than high ; the fourth segment a little shorter than the third ; 

 the fifth longer than either, and longer than the sixth and seventh together, having a 

 projecting tooth on either side near the base, widening to the attachment of the limbs, 

 then abruptly narrowing ; the sixth segment much longer than the seventh, distally 

 widened. There are no ventral spines. The animal is sometimes speckled with dendritic 

 markings on almost all parts. 



Eyes round, retaining colour in the specimen mounted in Canada balsam. 

 Upper Antennae. — The first joint rather shorter than the head and its accompanying 

 segment, with a pair of spinules above the centre of the upper margin, and three or four 

 on its distal end ; the second joint thinner and longer ; the third about half the length of 

 the first, widening a little distally ; the flagellum longer than the peduncle, of thirty 

 distinct joints, the first as long as the following three together ; the joints tipped with 

 small setules, the distal joints long and thin compared with the proximal, excepting the 

 first. 



Lower Antennas thinner and little longer than the peduncle of the upper, the 

 first two joints short, the gland-cone of the second tolerably acute and prominent ; 

 the third joint as long as the two preceding united, with a few spinules near the distal 

 end ; the fourth joint subequal in length to the first of the upper antennae-, and the fifth 

 a little shorter than their second ; the two-jointed flagellum is little more than a third as 

 long as the fifth joint of the peduncle, its first joint having spinules at four points of each 

 margin, the longer ones below ; the second joint is tapering, a third the length of the 

 first, with two little curved spines and some setules at its apex. 



Mandibles. — The cutting plate divided into five large unequal teeth ; the 

 secondary plate on the left mandible with a general simdarity to the principal plate, 

 against which it lies so closely that the teeth of the two plates could not be dis- 

 tinguished ; the secondary plate on the right mandible apart from the principal plate, 

 much smaller, with its distal edge cut into numerous denticles ; the spine-row on the 

 left mandible consisting of three large pectinate spines, the first the more tapering, 

 the other two the more curved ; the number of spines in the spine-row on the right 

 mandible was not clearly ascertained ; the molar tubercle prominent, with circular 

 strongly denticulate crown ; the palp longer than the trunk of the mandible, the first 

 joint considerably louger than broad, the second joint not longer than the third, slightly 



(ZOOL. CHALL. EXP. — PART LXVII. — 1888.) XxX 156 



