75 



The study of the structure of the animal contained within the capitulum has yielded the 

 following results : 



Month. Lab rum not very bullate, triangular when seen from above-, teeth hardly 

 distinguishable. Pal pi rather elongate with a tuft of hairs at and near the extremity. 



M a n d i b 1 e s with three teeth equally distant from one another ; the inferior angle blunt, 

 with half a dozen small indistinct teethlike nobs. Hardly any hairs on the surface of the mandible. 



Maxi 11a e with three stronger and one small upper spine and a notch between these 

 and the other spines. The notch is more distinct on the maxilla of the left side. The straight 

 part of the edge beneath the notch bears 7 or 8 spines, which are all of them smaller than 

 the three upper spines. The surface of the maxilla bears very few and very delicate hairs on 

 the part near the edge only. The apodeme is long and flat at the extremity. 



Outer maxillae with the inner margins covered with hair-like spines and the openings 

 leading into the body cavity at the extremity of long tubular projections. 



Cirri. First pair much shorter than the five posterior pairs, seated at a little distance 

 from the second pair. The rami of the first pair are unequal in length and breadth : the shorter 

 has 8 segments which are oblong in a transverse direction, the longer ramus has 12 segments 

 which are about as long as broad. The segments of the posterior cirri are elongated, the cirri 

 strongly curved. I counted 32 segments in one of the rami of the last pair. 



Ca u dal appendages with 8 segments-, each segment bears a few very delicate hairs 

 on the inner side near the extremity, the segments 5 — 8 bear moreover a very long spine-like 

 hair on the outer side near the extremity and the broad extremity of the 8 lh segment supports 

 six of these. 



Dwarf males. I found six of them in the pouch on the inner side near the extremity 

 of the left scutum; there are several in the pouch on the right side also, but I left them intact 

 so as not to damage the specimen more than was necessary. The males have the same shape 

 as in the nearly related species : Sc. javanicum etc. The shape is oval, but as the peduncular 

 extremity is slightly thicker, the whole is somewhat pear-shaped. A rather large and very 

 distinct opening leads into the cavity of the sac. The surface is covered with short, spinelike 

 hairs, which are larger and more numerous at the peduncular pole. No tracé of calcareous plates 

 or valves. The longest diameter of one of the males was nearly 1 mm. (0,93 mm.). 



The species was dredged at : 



Stat. 45. April 6, 1899. Lat. 7 24' S., Long. ii8°i5'.2E. Depth 794 m. Bottoin : fine grey 

 mud. Tvvo specimens. 



Observations. At Station 271, December 21, 1899; lat. 5°4ó'.7 S., long. i34°o'E.; 

 depth 1788 m.; bottom green mud, a specimen of a Scalpellum-s^&aes was collected (together 

 with three specimens of Sc. infiatum, mihi) which I think belongs also to the present species. 

 It was found attached to a piece of pumice-stone and it seems to be a slightly older specimen, 

 lts capitulum measures 27 mm., its peduncle is short and has a length of only 10,5 mm. The 

 form of the capitulum and that of the valves corresponds with that of Sc. chitinosum, but the 

 chitinous membrane covering the valves is considerably less thick : in consequence the shape 

 of the valves can be made out much easier. The most marked difference I discovered is, that 



75 



