212 
Besides the muscles the thorax contains or da rr 
three pairs of ligamenta (lig.), lying medialy | 
to the spermoducts, taking their origin from 
the points where the latero-dorsal muscles 
are attached, and stopping at the middle of the 
ventral surface. They seem to be attached off 
the places where the intervals between the 
thoracic segments should be, if such a seg- > 
mental division were found; but I am not 75 
able to interpret them. They seem to con- 4 
sist of chitige; at alf-events they are not 
muscles. 
Female. (Figs. 8, 13—18). Elg: 13 Te es DE ER 
Length 2.5 mm, breadth 2.6 mm. 
Exterior. As may be seen from my fig. 8 (the female in situ), 
the fam. Dajidæ (Isopoda) immediatly gets us in mind; but in the 
Dajidæ it is the hind end which is prolonged while in the spec- 
ies in question this applies to the fore-end. 
The body is somewhat symmetrical; the fore-end is bent a little 
to the right. Concerning the processes on the left side of the 2. 
and 3. thoracic segment see below. 
The body is composed of a head (ce.), four thoracic segments 
(th. 1—th. 4), and an unsegmented postabdomen (ap.). The ventral 
side is concave, the dorsal side vaulted with a projecting three- 
angular carina or process on the fore-part of the postabdomen. The 
head and the two first thoracic segments are much narrower than 
the hindpart of the body, which is trapezoid with the shorter side 
posteriorly and with a little concavity on each side and on the 
middle of the hind edge. 
At the dorsal side there is a distinct segmentation between 
the head and first thoracic segment, and on the left side between 
the segments 1—2 and 2—3. Also the limit between 4th thora- 
cic segment and first abdominal segment is rather sharp at the 
middle of the back, and may be seen as a fine line at the ws 
side-edges of the body. The limit between 3. and 4. segment IS 
marked by a pair of small impressions due to the fixation of the 
second pair of the dorso-ventral ligaments; similar impressions aré 
found where the exterior ramus of the hind part of the dorsal 
