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34. Spheronella Munnopsidis n. sp. 
(Pl. X, fig. 4a—4d.) 
FEMALE. The only specimen found was torn and half empty; it was ab. 5 mm. 
in length and a little shorter than broad. The head is very small and not separated from 
the trunk at all; frontal and lateral borders are altogether wanting, whereas the sub-median 
skeleton is developed into a single, good-sized, solid plate, to which the maxilla and maxilli- 
peds are articulated (fig. 4b). Antennule rather short, not distinctly jointed, but the length 
of the first joint is easily seen, as its distal anterior angle protrudes in the usual way and 
is furnished with setz which, however, are short; the sete on the distal part of the 
antennule are scarcely of medium length. Antenne are wanting. The mouth is good-sized 
and the mouth-border broad. The principal branches of the maxillule are pretty long, the 
additional branch a little shorter. The maxilla are good-sized; their basal joint smooth, 
supplied with two rows of short, thick, blunt sete or small processes along the inner margin 
of the skin that connects it with the second joint. Basal joint of the maxillipeds of medium 
length; on the inner side of its distal half are two areas of extremely short hairs; second 
joint of normal length, somewhat dilated towards its distal end, on the inner side of which 
are seen some minute hairs; third joint short and clumsy; in the left maxilliped it has at 
its distal inner angle a short and very broad, rounded spine which is furnished with 
exceedingly short hairs; in the right maxilliped this spine is wanting, but the joint is still 
shorter and broader, and its inner margin is hairy; in the left maxilliped the fourth joint is 
tolerably short and hairy along the rounded end, in the right maxilliped excessively short 
and hairy along both margins. Sub-median skeleton quite naked. Trunk naked; trunk-legs 
wanting. Genital area somewhat larger than the part occupied by the mouth-appendages; 
it consists of a transverse plate which is a little more than twice as broad as long, fairly 
rectangular, but the outline is irregularly sinuate; properly speaking, this plate consists of 
a moderately broad ring of thick yellow chitine surrounding a thinner light area, which, 
however, is somewhat more solidly chitinised than the skin which surrounds the ring. The 
genital apertures are situated comparatively far apart, each at one end of the thinner area 
and on its posterior margin; their distance from each other somewhat exceeds the length of 
each; their direction is almost rectangular to the longitudinal axis of the animal, so that 
their muscles are turned nearly straight in adyance parallel with the axis, and their hindmost 
lip is strongly curved. Somewhat in front of each genital aperture we see at the posterior 
margin of the foremost transverse list of the frame a circular hole (k), which is no doubt 
the orifice of a gland which otherwise I have been able to detect only in Mysidion abys- 
sorum and in Aspidoecia. Only one of the receptacula seminis (r) is shown in the drawing, 
but to the orifice of each receptaculum is fixed a spermatophore, one of which (s) is well 
preserved, whereas of the other (s') only the stalk is left. These orifices are situated 
