2 12 



Mandible (PI. XXI, fig. 9): distance between extremities of teeth 1 and 2, and 2 

 and 3 nearly equal. Tooth 1 pointed, 2 and 3 doublé, 3 somewhat broader, 4 and 5 small, 

 but distinct, inferior angle represented by a rudimentary nob. The hairs on the surface towards 

 the inferior part go over into toothdike nobs. Few hairs only along the inferior margin. 



Maxilla (PI. XXI, fig. 10): notch behind the two superior spines very distinct, and 

 5, sometimes 4 somewhat shorter spines, between the notch and the two inferior spines. The 

 latter a trirle longer than the upper pair. Of the middle spines, the 4" 1 is longer and thicker 

 than the others. 



Ou ter maxi 11a e (PI. XXI, fig. 11): outer lobe grows slightly narrower towards 

 extremity and has the apex somewhat curved inwards, conseqently the interior margin is a little 

 hollowed out. Surface partly covered with hairs. These hairs are disposed more densely towards 

 distal extremity, where they form a kind of a tuft. Downwards, in the direction of the inner 

 lobe, a very conspicuous row of hairs is seen, most of which stand off in horizontal direction. 

 Inner lobe of oval shape, not much elongated ; in one of the specimens its shape is hardly 

 longer than broad. Hairs disposed on inner lobe not so numerous and not quite so long and 

 stout as in most other species of the genus. 



Cirri. First pair has unequal rami of 6 and 12 segments in one, 6 and 13 in another 

 specimen. Segments cylindrical, hardly protuberant, those of the shorter ramus are slightly 

 broader than those of the longer ramus. 



Second pair has short rami of 5 and 7 segments respectively ; segments not protuberant, 

 but having the anterior face rounded ; shape of segments as a whole almost circular. Tufts of 

 hairs along rounded anterior faces not very dense. 



Third pair has somewhat longer rami of 6 to 7, and 8 segments, each segment being 

 about one and a half times as long- as broad. The anterior face of the segments swollen and 

 bearing along that swelling or protuberance (PI. XXI, fig. 1 2) a row of teeth, which from the 

 base to the upper end increase in size. These rows of teeth are present along segments 2 to 5 

 in the one, and segments 2 to 6 in the other ramus; near the upper margin of the segments 

 each row ends in a curious minute comb formed by a horizontal row of very small teeth. Last 

 segment of pedicel shows very minute teeth along anterior margin, near the extremity. 



Fourth pair has rami of 14 and 16 rather elongate segments; last segment of 

 pedicel quite unarmed ; the anterior face of the middle segments of the shorter ramus bears 

 only two pairs of spinedike hairs, the lower segments have only one pair and a pair of much 

 shorter hairs; the anterior face of the latter segments (PI. XXI, fig. 13), near the distal extremity, 

 is furnished, moreover, with 2 to 3 somewhat recurved teeth. The middle segments of the longer 

 ramus always have three pairs of such spinedike hairs. None of the segments of the longer 

 ramus are furnished with teeth. 



Fifth pair has 20 rather long segments in each ramus and, in the middle of the 

 ramus, each segment furnished with 4 pairs of hairs on anterior face. 



Sixth pair has 21 and 23 long segments in the two rami, and 4 pairs of hairs on 

 anterior face of the middle segments (PI. XXI, fig. 14). The first segment of the pedicel of 

 this cirrus has the posterior margin distinctly serrated. 



84 



