68 CRUSTACEA COPEPODA. II. 
86. Sphzronella Melphidipp2 n. sp. 
(Pl. V, figs. 2 a—2 d). 
Female unknown. 
Male. — Allied to S. capensis H. J. H. The single specimen is 0.185 mm. long and somewhat longer 
than broad. Seen from below (fig. 2 a) the head is somewhat broader and considerably longer than the trunk, 
with the frontal margin naked. — The antennule are long, even more than one-third as long as the body, 
and besides somewhat robust, with long seta. — Antennee 3-jointed; the joints subequal in length, and 
the third terminates in a somewhat short, strong seta. — The mouth is unusually small. — Maxillule normal, 
with additional branch (exopod). — The maxille are very characteristic; the first joint is very robust and 
has on its postero-interior side a longitudinal row of about 5 very oblong, somewhat curved, acute processes 
(fig. 2.e); the second joint is broad at the base, the claw slender and somewhat long. — Maxillipeds moderately 
long; first joint robust, rather considerably longer than the remainder of the appendages, with some trans- 
verse rows of setz on the anterior side, and among these rows one a little beyond the middle and 
one a little before the end are long, while the others, one of which near the base, are short, and 
besides the outer side of the joint has several sete; the claw has a minute spine close before the 
end. — The submedian skeleton has two pairs of processes; the first pair, originating between the inser- 
tions of the maxillipeds, is of middle length, while the processes of second pair are quite small, oblong triangles 
near each other. — The ear-shaped arch surrounding the base of each antennula is equipped with hairs of 
middle length, and from that point the hair-covering continues in a narrow stripe of similar hairs along 
the whole length of the outside of the protruding lateral border of the head; from the posterior angle of this 
border a broad, transverse belt of similar hairs runs upwards and backwards across the side and the back 
of the animal in a very slanting direction (fig. 2 b). On the back behind this line we find the usual naked 
transverse area which is moderately long; the sides of the trunk, the posterior surface and the ventral surface 
excepting in front are rather densely covered with hairs of medium length. — The first pair of legs consists 
of a very broad and somewhat short, partly hairy basal part, from which projects a moderately long branch 
possessing a triangular protuberance of its base (fig. 2d) and terminating in some hairs and a single seta 
about as long as the first joint of the maxillipeds. Second pair of legs (fig. 2 b) consists of a joint which is 
somewhat shorter and considerably thicker than the branch of first legs, has a rather large, dorsal, sub- 
triangular protuberance at the middle, and terminates in a seta, which is a little longer than that of first 
legs. — The caudal rami are thick, longer than thick, and the terminal seta about as long as that of first legs. 
Ovisacs. — They are large, ovate, with numerous eggs. 
Remarks. — Though the female is unknown I do not hesitate to establish this species, as the male, 
which is excellently preserved, is very characteristic by the armature of the basal joint of the maxilla. And 
no other Choniostomatid has been found on any species of the genus Melplidippa Boeck. 
Occurrence. — Taken by the “Ingolf” at a single place. 
North-West of Iceland: Stat. 15: Lat. 66°18’ N., Long. 25°59’ W., 330 fathoms, temp. + 0°75; in 
the marsupium of a mutilated Melphidippa borealis Boeck 1 male, 
2 ovisacs, and a half-developed embryo of the Amphipod. 
