141 
trunk, well defined and unusually broad in proportion to its length. The frontal margin 
naked (fig.4¢). Antennulz short, with tolerably short sete. Antenne well developed, but 
partly broken off. Mouth good-sized, mouth-border of medium breadth. Anterior branch of 
the maxillule very long, additional branch rather short. Basal joint of the maxillz hardly 
middle-sized, smooth. Maxillipeds proportionally small, much shorter than in any of the pre- 
ceding species; the basal joint, in proportion to its length, rather thick, naked; second and 
third joints coalescent, last joint pointed. The sub-median skeleton deviating much in ap- 
pearance from those in the preceding species (comp. fig.4c), naked. Lateral margin of the 
head with a series of moderately short hairs. Trunk naked; trunk-legs small, with short 
sete. Genital area (fig. 4d) much narrower than the head, considerably broader than long, 
forming a transverse, pretty solidly chitinised plate, which is sub-oval, yet a tolerably large 
part of the posterior margin forming a straight line; the genital apertures are large, the 
distance between them of about medium length; they are furthermore considerably curved, 
and the anterior half of their inner lip nearly parallel; their posterior extremities are found 
a little in front of the posterior margin of the plate. The caudal stylets are situated close 
together on the posterior margin of the plate; they are small, with shorter setz. The 
part of the plate which is situated behind the genital apertures, and a narrow area sur- 
rounding the membranous part, which, as usual, is found outside each genital aperture, are 
furnished with numerous fine and rather short hairs; the remainder of the genital area 
is naked. 
MALE. Unknown. 
OVISACS. Compared with the female found, they are very large (fig. 4b: fig. 4a) 
and without much difference in size: the largest, which is represented, is ‘56 mm. in length. 
The eggs are large, not numerous. 
LARVA and POST-LARVAL DEVELOPMENT. Unknown. 
HABITAT. In the marsupium of a female of Dulichia monacantha Metzger from 
Denmark were found: one female and four ovisacs. 
REMARKS. The female is easily distinguishable from all other species by its very 
short, but otherwise quite normally constructed maxillipeds. 
24. Sphzronella Acanthozonis n. sp. 
(PI. VII, fig. 5a—5d). 
FEMALE. ‘The only specimen found is very large, namely 42 mm. in length, 
34mm. in breadth, and nearly as thick as broad. The body seen from below (fig. 5b), is 
regular and rather shortly ovate, narrowest towards the front, the head and the genital 
area situated at a not very short distance from the anterior and the posterior outline re- 
spectively, and the trunk-legs very far from the lateral outline; seen laterally (fig. 5a), the 
