1 1 



which are longer than the others, above and four beneath the notch. Of the latter, one is much 

 longer and stronger than the three others. Apodeme moderately long. 



Outer maxillae rounded, hairs in three distinct groups; processus with the opening 

 giving entrance to the body cavity rather long and rounded at the end. 



Cirri. First pair with very unequal rami: the anterior indistinctly divided into si.K 

 segments, broad, growing narrower towards the extremity, flat-, the posterior ramus longer, 

 composed of eight segments, somewhat cylindrical. In both rami the first seement is much lono-er 

 than the following; the last is again rather short. Surface of both rami covered with lono- bristles. 

 The first pair of cirri is attached close to the mouth and at some distance from the second pair. 



The second pair has nearly equal rami of respectively 1 2 and 1 3 segments. The 

 first segment in both rami is the longest; next come three or four segments which are only 

 slightly longer than broad: then five or six segments which grow gradually longer and narrower, 

 while the remainder are shorter than the foregoing, but narrower. The longest segments have 

 four pairs of spines along the anterior margin: the first pair short, the second pair slightly 

 longer, the third rather long, the fourth pair by far the longest and stoutest. 



The last pair of cirri has 20 segments in both rami, 13 segments, however, in one 

 of the rami of the right cirrus. Segments gradually increasing in length, with 3 and 4 pairs 

 of spines on the anterior margin. The spines of the last segments are extremely long and 

 distinctly curved. 



Caudal appendages rather long and narrow, composed of five segments. The end 

 of the fourth segment reaches to the end of the pedicel of the sixth cirrus. A couple of very 

 long and delicate hairs are planted at the end of the third and fourth segments, half a dozen 

 at the tip of the 5"^ segment. 



No penis. Animal unisexual. The specimen I investigated was furnished with a cluster of 

 eggs, altogether 20 in number, soldered together and attached with two threadlike "ovigerous 

 frena" to the inner surface of the mantle or sac. The size of the eggs was: 0,43 X 0,3 mm. 

 Their shape was oval. 



I found one little male attached to the interior of the left scutum in one of the 

 specimens and I think I also saw one on the right side of the same individual. The shape 

 of the one I loosened from the female was broad, oval, its dimensions being 0,55 X 0,4 mm. 

 I observed the prehensile antennae attached to the sac at a short distance from the peduncular 

 pole. No trace of valves. Extremely short and delicate hairs could be seen only at that part 

 of the surface, which corresponds to the capitular pole. [The little animal was not in a very 

 good state of preservation — other details of its structure could not well be made out.] 



Of this interesting species three specimens were found attached to a much ramified deep- 

 sea organism of unknown nature. A specimen of Verruca spec, was attached to the same plant. 

 It was dredged at : 



Stat. 221. November 4, 1899. Lat. 6°24'S., Long. 124° 39' E. Depth 2798 m. Bottom: solid 

 bluish grey mud with Foraminifera. 



Observation. This is a very characteristic species. The shape of its scutum is much 

 like that of Sc\ distinctum Hoek and Sc. hitmile n. sp. ; in other regards (more elongate form 



113 



SIBOGA-EXPEDITIE XXXI ff. *S 



