156 
29. Sphzronella dispar n. sp. 
(PL. IX, fig. 3a—3k) 
FEMALE. A large specimen (fig. 3d)') which had only laid three ovisacs was 
‘69 mm. long and ‘79mm. broad, thus being broader than long; two other specimens without 
ovisacs were of the same shape and size, whereas a fourth specimen (fig. 3a), which had laid 
about a score of ovisacs, was much smaller, 49 mm. in length and ‘38mm. in breadth, thus 
being longer than broad. The head is not defined from the trunk at all, and the area 
bearing the mouth-appendages is surrounded by asoft membrane; the usual chitinised parts, suchas 
frontal border and lateral borders, are altogether wanting (fig. 3f). Antennulz short, 2-jointed, 
with about three pretty short sete. Antenne wanting. The sete of the mouth-border I 
have not been able to discern with certainty. Maxillule small, with tolerably short prin- 
cipal branches, and additional branch wanting. Basal joint of the maxille smooth; the 
connecting membrane between the first 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 anterior side with several irregular rows of very short 
and fine hairs; second and third joints fused into one rather clumsy jot with a somewhat 
sinuous outline, the distal spine being a little broader than in the preceding species; the 
last joint terminates bluntly and its end is surrounded by a row of numerous, very short 
and fine setee. 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 opens towards the front, its sides are narrow, and its posterior 
part broad. Genital apertures comparatively large, much curved, anteriorly parallel, and 
not far apart, the space between them solidly chitinised. The whole area naked; caudal 
stylets wanting. 
MALE. It is middle-sized or pretty large in proportion to the female (fig. 3b: 
fig. 3d and fig. 5a); its length is ‘21mm. to -22mm. Seen from below (fig. 3h), its outline 
comes Close to that of S. decorata, but its front is very different. Head and trunk of about 
equal size. The front much produced, its lateral margins converging strongly a long way, 
till the distance between them is a little shorter than the diameter of the mouth, after which 
their anterior extremity expands into a disk, which is a little Jarger 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 mouth-appendages (as is partly shown in the drawing) were placed in an abnormal position 
by pressure, 
