156 

 29. Sphaeronella dispar u. sp. 



(PI. IX, ti-.3a— 3k.) 



FEMALE. A large specimen (fig. 3(1)') wliich had only laid three ovisacs was 

 •69nnn. long and -711 mm. broad, thus being broader than long; two otlier specimens without 

 ovisacs were of the same shape and size, whereas a fourth specimen (fig. 3a), wiiich had laid 

 about a score of ovisacs, was mucli smaller, ^it mm. in length and ''dS mm. in breadth, thus 

 being longei' than broad. The head is not defined from the trunk at all, and the area 

 beajing the mouth-appendages is suironnded by a soft membrane ; the usual chitinised parts, such as 

 frontal border and lateral borders, are altogether wanting (fig. 3f). Antennulse short, 2-jointed, 

 with about three pretty shoit setae. Antenna} wanting. The setae of the mouth-boider I 

 have not been able to discern with certainty. Maxilluh* small, with tolerably sliort prin- 

 cipal branches, and additional bianch wanting. Basal joint of the maxillae smooth; the 

 connecting membrane between the fiist and the second joint without chitinous taps; second 

 joint distinctly separated from the third, which is comparatively long and slender, and termi- 

 nates in a few fine setaceous branches. Maxillipeds of medium size, but appear to be weak; 

 the basal joint being provided on its anterioi- side ■with several irregular rows of very short 

 and fine hairs; second and third joints fused into one rather clumsy joint with a somewhat 

 sinuous outline, the distal siiine l)eing a little broader than in the ineceding species; the 

 last joint terminates bluntly and its end is surrounded by a row of numerous, very short 

 and fine setae. The sub-median skeleton is much reduced. The trunk is naked. The genital 

 area is rather small (fig. 3d), much broader than long (fig. 3g); the .solid chitine forms a 

 kind of semi-circle which oi)ens towards the front, its sides are narrow, and its posterior 

 part broad. Genital apertures comparatively lai-ge, much curved, anteriorly parallel, and 

 not fai' apart, the space between them solidly cliitinised. The whole area naked; caudal 

 stylets wanting. 



MALE. It is middle-sized or pretty large in proportion to the female (fig. 3 b : 

 fig. 3d and fig. 3a); its length is -21 mm. to •22 mm. Seen from below (fig. 3h), its outline 

 comes close to that of S. decorata, but its front is very diflerent. Head and trunk of about 

 equal size. The front much produced, its lateral mai-gins converging strongly a long way, 

 till the distance between them is a little shorter than the diameter of the mouth, after wliich 

 their anterior extremity expands into a disk, which is a little larger than the mouth, and 

 thus is situated on a short peduncle. The larger part of the free margin of the disk is 

 furnished with a row of slender, almost setaceous processes, and on the ventral surface of the 

 disk, towards its base, we .see a small chitinous ring; on its inner side this ring is provided 

 with four expansions, which turn towards its centre and constitute the surrounding of a 



1) The inouth-apiiendages (as is partly shown in tlie drawing) were placed in an abnormal position 

 by pressure. 



