?IANSEN, II. .1.: IIF.MIMERI'S TALPOIDKS wLK. 75 



the ventral portion of the greater loth tergite (t"'). At the inner 

 margin of this last tergite is seen a small, triangular plate, un- 

 doubtedly the very small loth sternite (s'*^), the posterior edge 

 of which forms the anterior wall in the cotyle of the cerci ; the 

 rest of the ventral side of the 10th segment is membranous. The 

 nth segment, the »telson», is, seen from above, anteriorly trun- 

 cated and posteriorly rounded, seen from below (PI. 3, fig. 7, 11) 

 the lateral j^ortion is anteriorly somewhat prolonged into the mem- 

 brane of the loth segment; it is all over firmly chitinised, the 

 sternite and the tergite not being separated by any membrane. 

 Unfortunately 1 am not able to give so full a description of 

 the structure of the male, having only one single specimen, which 

 shall be spared. As mentioned before we find 8 well developed 

 sternites, belonging to the 2nd — 9th segment; in the female the 

 sternite of the 7th segment was produced backwards as a rounded 

 lobe, but in the male the sternite of the 9th segment is, quite 

 from the lateral margins, produced backwards as a somewhat 

 shorter, triangular lobe (PI. 3, fig. 9), the median hind corner of 

 which is further produced into a smaller, somewhat oblique, spine- 

 like process, which seen from the side (PI. 3, fig. 10) is curved 

 considerably outwards. Behind the lobe are seen the exterior 

 male organs, viz., 2 large chitinous hooks (fig. 9, a) and the 

 penis (b). The two hooks are lying on each side of the median 

 line, but both are curved towards the left (seen from below as in 

 fig. 9 towards the right) side; the right hook is curved only a 

 little, the left very considerably, and this is half as long again 

 as the other. The penis (b) is large, rather soft-skinned, a little 

 laterally compressed, posteriorly somewhat expanded, with the 

 right lateral corner produced into a shorter, cylindrical prolon- 

 gation, the terminal end of which is obliquely cut ofi;' and shows 

 a peculiar structure; near the median line on the inferior side at 

 the hind margin of the penis is found a small, conical process. 

 — The loth tergite of the male is somewhat depressed longitu- 

 dinally in the median line (PI. 2, fig. 2); the 1 1 th tergite is 

 somewhat different in shape from that of the female, viz., some- 

 what larger and longer and posteriorly cut off. About the struc- 

 ture of the loth sternite and the iith segment I am not able 

 to give any further information; the figure 9 (PI. 3» shows what 



