2CM 



longitudinal group and the superior margin. The inner surface near the free extremity, and the 

 inferior margin, are furnished with microscopical hairs or ciliae. The latter stand in distinct little 

 groups or bushes, especially in the specimen from Strait Molo. 



Mandible (PI. XIX, fig. 11): teeth i and 2 pointed, their extremities at somewhat 

 greater distance from each other than those of 2 and 3. Teeth 2 and 3 distinctly doublé. 

 Tooth 3 thick. Teeth 4 and 5 close together, rather thick. Inferior angle terminating in two 

 small, pointed spines, or rudimentary teeth. In the specimen from Strait Molo, teeth 4 and 5 

 are less distinctly developed, tooth 5 being confused with inferior angle. The latter bears no 

 spines or rudimentary teeth. 



Maxilla (PI. XIX, fig. 12 and 12*): Xotch small. The inferior pair of jonger spines 

 situated on an indistinct step-like projection in the larger (older) specimen only. A group of 

 smaller spines is situated on the edge behind the inferior pair of larger spines. Between the small 

 notch and the inferior pair of spines 5 spines are arranged in a single row and alternately 

 point with their extremities to one or the other side. 



Outer maxillae (PI. XIX, fig. 13): Outer lobe broad at the basis, the exterior 

 circumference regularly rounded, and the apex somewhat pointed. Hairs on distal part numerous 

 and delicate; the row of hairs extending from the outer lobe to the inner one partly doublé, 

 these hairs standing off horizontally. Hairs on inner lobe not numerous, but disposed in several 

 rows; a group of short spine-like hairs under and behind the longer feathered ones. 



Cirri: First pair. Rami unequal of 7 to 9, and 14 segments. The three lower segments 

 of the shorter ramus fused together. Middle segments distinctly protuberant, protuberances 

 covered with dense bushes of hairs. Six inferior secrments of longer ramus shorter than broad, 

 segments 7 — 9 quadrate, and 10 — 14 longer than broad. In the specimen from Strait Molo, 

 the lower segment of the shorter ramus consists of only two segments, the whole number being 

 8 to 9 in consequence. The longer ramus lias three segments more : 1 7 in all. 



Second pair. Shorter ramus has 7 segments, the basal one consisting of three 

 segments. Longer ramus has 9 segments. All the segments furnished with dense groups of 

 spine-like hairs situated on rounded protuberances. In the specimen from Strait Molo the number 

 of segments is 10 and 11 ; here the spine-like hairs are extremely numerous, feathered, and 

 arranged very densely. 



Third pair. Xumber of segments 11 and 12, 11 in the shorter and 13 in the longer 

 ramus in the specimen from Strait Molo. Bushes of hairs on the protuberances of the segments 

 not so dense as on second cirrus. These protuberances (PI. XIX, fig. 14) are furnished with quite 

 a row of small recurved teeth, with the exception of only the last three segments in the shorter, 

 and the last in the longer ramus. The teeth on the protuberances are partly recurved; about 

 half of them are short and spine-like. 



Fourth pair. Dorsal margin of basal segment of one ramus furnished with a doublé 

 row of short tooth-like spines, such spines being seen also on the dorsal margin near the 

 extremity of the 2 nd segment. Inner face of 2 nd — 6 th segments furnished along and near the 

 margin with numerous but small recurved teeth (PI. XIX, fig. 15) arranged in small groups along 

 a longitudinal row of slightly stronger teeth; a few more of these are seen on 7* to io lh segments. 



73 



SIBOGA-EXPEDtTIE XXXI l>. zó 



