128 



broadly rounded, the median part of the posterior margin has a broad and very deep incision; 

 the median part of the plate, outside and especially in front of the genital apertures, consists 

 of soft membrane. The genital apertures are rather large, strongly curved and situated 

 pretty close together. The caudal stylets are very small and situated near each other on 

 the soft membranous part on a line with the posterior niargin of the chitinous plate. On 

 each side of this plate, at a considerable distance from the margin, runs a very long, curved 

 line of very long, outward turning hairs, and from the part between the genital apertures 

 towards the caudal stylets run four stripes, anteriorly very narrow, posteriorly broader, 

 of extremely short, tine hairs. 



MALE. The best preserved specimen has become ci'ooked through pressure (fig. 2f); 

 it is -21 mm. in length, consequently of small size compared with the female (fig. 2b : fig. 2a) 

 and has a broad shape similar to that of the male of S. Argissa (represented in pi. IV, 

 fig. 3g — 3h), whereas in hair-covering and' in the structure of the trunk-legs etc. it bears 

 great resemblance to S. Meiopce (pi. V, fig. If— Ig). The head seems to be somewhat larger 

 than the trunk. The front is somewhat produced as in S. Arc/issce, but the margin scarcely 

 concave in front of the antennulse. Antennulae, antennae, mouth, maxillulai and maxillae 

 essentially as in S. Metopce. The basal joint of the maxillipeds has a short, broad, conical 

 process on its inner surface, besides several groups or stripes of moderately long hairs; the 

 last joint is digitated, at the apex ending in about four points. The tluee pairs of pro- 

 cesses of the sub-median skeleton are somewhat like those of S. Meiopxe, but the first pair 

 are longer and more pointed, the second pair a little shorter and more or less diverging. 

 The lateral margin of the head is fringed with somewhat longer hairs than in *S'. Metopte, 

 and from its posterior angle a somewhat broader stripe of longer, and dorsally very long 

 hairs runs almost vertically upward across the side and the back; behind this stripe is a 

 moderately long, naked, dorsal transverse area, whereas the remainder of the trunk is covered 

 with hairs as in S. Metopce, however, the hairs are proportionally longer and coarser. The 

 dorsal and lateral parts of the head have hollow spaces beneath the skin. The first pair of 

 trunk-legs nearly as in S. Metopce; the most important difference is that the terminal 

 seta of the inner bi-anch is considerably shoi-ter, and shorter than the distance between 

 the base of the leg and the end of the outer branch. The second pair of legs are some- 

 what largei' than in *S'. Metopce, but the shape and setae are much the same as in this 

 species. The caudal stylets end in a single seta which is scarcely as long as in the pre- 

 ceding species. 



OVISACS. They are comparatively rather small (fig. 2 c), sub-globular or oval, 

 dittering rather slightly in size; one of the largest which is -63 mm. in length and -52 mm. 

 in bi-eadth, is represented. The eggs are proportionally rather small and pretty numerous. 



LARVA and POST-LARVAL DEVELOPMENT. Unknown. 



HABITAT. The marsupium of Paramphithoe Boechi H. J. H. from West-Green- 

 land, oS Godthaab, »deep water- [probably 40—60 fathoms], on Sertiilaria, C. HolboU. In 



