4 G. O. Sars. 
surpassing half the length. The cephalic segment is comparatively 
large, exceeding in length the 4 succeeding segments combined, 
and exhibits dorsally, somewhat behind the middle, a well-marked 
transversal suture, indicating the boundary between the cephalon 
and the Ist trunkal segment. The front is slightly narrowed and 
transversally truncated at the end, exhibiting below no trace of 
any rostral prominence. The 3 succeeding segments gradually 
diminish both in length and width, being sharply marked off from 
each other, and having the lateral parts simply rounded, without 
any projecting epimeral plates. The last trunk-segment is ex- 
tremely small and, as usual, very movably articulated to the preced- 
ing segment, whereas it is more firmly connected with the ad- 
joining genital segment. The tail is very slender and narrow, 
equalling in length about 3/+ of the anterior division. It is com- 
posed of 4 well-defined segments, the Ist of which, the genital 
segment, as usual, is much the largest. Seen dorsally or ventrally 
this segment exhibits a somewhat fusiform shape, being produced 
on each side, a little in front of the middle, to an obtusely tri- 
angular expansion, to which probably the ovisacs, when present, 
are attached. Below the segment has close to the base a small 
protuberance (see fig. 2), and at the end of the above-mentioned 
lateral expansions a slight fissure, flanked behind by 2 small 
spinules, may be traced. The 2 succeeding segments are about 
of equal size, whereas the last, or anal segment is considerably 
larger and gradually somewhat widens distally. At the end this 
segment is transversally truncated, with a slight incision in the 
middle indicating the place where the anal opening occurs, and 
just in front of this incision the anal opercle is seen arching over 
the said opening. 
The caudal rami (see figs. 1, 2 & 5) are highly remark 
able and very unlike those in the other known Lichomolgide. 
They are of considerable size, exceeding half the length of the 
remainder part of the tail, and greatly divergent, forming 2 lamel- 
lar, oarblade-like pieces movably attached by a narrow base to 
the end of the anal segment. In about the middle the outer edge 
of each ramus forms a slight protuberance, which however does 
not exhibit any trace of a seta. The inner distal corner of each — 
ramus is produced in a remarkable manner to form a tongue-like 
triangular lappet, outside which occurs a well-marked rectangular 
ledge carrying the caudal sete. These are very small and only 
