CRUSTACEA COPEPODA. II. 75 
ovate; the head is uncommonly large in proportion to the trunk and not marked off. Frontal margin naked, 
transverse and nearly touching the base of the proboscis. — Antennule rather short with a few short sete, 
3-jointed ; first joint distinctly longer and thicker than any of the two others, which are subsimilar in length. 
— Antenne wanting. — The rostrum, excepting its terminal part, is much inflated (fig. 6 b) with the front 
wall reaching for beyond the anterior margin of the head; the mouth is middle-sized. — Maxillula some- 
what small; the additional branch is well developed. — Maxille somewhat small; first joint naked; second 
joint completely fused with the curved, acute claw. — Maxillipeds somewhat clumsy; first joint naked; 
second and third joints marked off from each other, and the latter with a minute, simple spine below the 
insertion of the acute, simple claw. 
Submedian skeleton rather feebly developed, without processes. Both the lateral borders of the 
head and the entire trunk without hairs. — Genital area small, transverse and together with the caudal 
rami in all features so similar to that in S. Munne that a description is superfluous. 
Male unknown. 
Ovisacs. — Together with the female described was found a lump consisting of two ovisacs pasted 
together; the ovisacs are somewhat irregularly shaped, each about twice as large as the emptied female 
and with a rather good number of eggs. 
Occurrence. — Taken by the “Ingolf”’ at a station in the warm area. 
West of Iceland: Stat. 90: Lat. 64°45’ N., Long. 29°06’ W., 568 fathoms, temp. 4°4; in the mar- 
supium of a specimen of Nannoniscus simplex H.J.H. 1 female and 
2 ovisacs. 
95. Spheronella Pleurogonii n. sp. 
(Pl. V, figs. 7 a—7 h). 
Female. — A very large specimen (fig. 7 a) is 0.97 mm. long and 0.95 mm. broad; it had not de- 
posited the eggs. The head is rather small as compared with the trunk and well marked off. The frontal margin 
is moderately convex, naked. — The antennule (fig. 7 d) very short, 2-jointed; first joint considerably thicker 
than long and twice as thick as the second, which is a little oblong with only 2 sete. — Antenne wanting. 
— Rostrum well developed; mouth middle-sized. — Maxillule with the two principal branches rather long 
and besides an additional branch. — Maxille only moderately developed; basal joint somewhat small and 
smooth; second joint fused with the claw, which has some minute bristles towards the obtuse end. — Max- 
illipeds proportionately somewhat small; first joint twice as long as the other joints together, curved, without 
hairs; second and third joints are fused into a moderately thick but very short joint, while the last joint 
is still shorter, cylindrical with the end rounded, and equipped with a number of minute bristles. 
Submedian skeleton distinct though feebly developed. Posterior half of the protruding lateral borders 
of the head with a row of very short hairs, while the trunk seems to be quite naked. — Genital area (fig. 7 e) 
only about half as broad as the head, showing a chitinized ring much broader than long; its front margin 
is slightly concave at the middle, a longitudinal median plate runs from the anterior to the posterior part 
of the ring, and the posterior margin is triangularly incurved at the middle, while the caudal rami are inserted 
To* 
