141 



trunk, well defined and unusually broad in proportion to its length. The frontal margin 

 naked (fig. 4c). Antennulse short, with tolerably short setae. Antennae well developed, but 

 partly broken ott'. Mouth good-sized, mouth-border of medium breadth. Anterior branch of 

 the maxillulse very long, additional branch rather short. Basal joint of the maxillae 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 

 seta?.. Genital area (fig. 4 d) 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 setae. 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. Sphaeronella Acanthozonis n. sp. 



(PI. VII, fig. 5a— 5d). 



FEMALE. The only specimen found is very large, namely 42 mm. in length, 

 34 mm. 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 



