1909.] OF THE THIRD TANGANYIKA EXPEDITION. 47 
Genus Inyorninus Lilljeborg. 
Generic Characters. e or less cylindric in form, with 
rather thin and flexible integuments and the segments sharply 
marked off from each other. Cephalic segment large, and pro- 
jecting in front to a rounded rostral plate not defined at the 
base. Urosome attenuated behind, with the genital segment 
distinctly divided in the middle. Caudal rami more or less 
produced, not lamellar, with one of the apical sete very strong, 
spiniform. Anterior antennze in female composed of only five 
joints, thickly clothed with partly spiniform sete; those in male 
distinctly hinged. Posterior antenne rather strong, with the 
distal jomt armed with coarse claw-like spines; outer ramus 
small, uniarticulate. Mandibular palp likewise uniarticulate. 
Maxille and maxillipeds comparatively short and stout. First 
pair of legs only slightly differing from the succeeding ones, and 
not prehensile ; inner ramus in this and the two succeeding pairs 
biarticulate and much smaller than the outer, that of the 4th 
pair quite rudimentary, uniarticulate; 5rd pair of legs in male 
slightly transformed. Last pair of legs comparatively small, with 
the distal joint well defined or confluent with the proximal one; 
inner expansion of the latter broad, but not projecting. A single 
ovisac present in female. 
Remarks.—This genus was established in the year 1902 by 
Prof. Lilljeborg, to comprise a small Harpacticoid, /. flexibils 
Lilljeborg, found by him off the shores of the Baltic in the neigh- 
bourhood of Stockholm. I have myself met with the same species 
near Christiania, in shallow bays of the Fjord, and thus have 
had an opportunity of examining it more closely. Prof. Lilljeborg 
refers this genus to the subfamily Nannopodine of Brady, which, 
according to that author, comprises the two genera Vannopus 
and Platychelipus. The first of these genera is still very. imper- 
fectly known, but is apparently referable to the family Cletodide. 
The second genus, in my opinion, is very different, and ought to be 
referred to the family Laophontide. In any case, the present genus 
seems to me to be a genuine Cletodid, exhibiting, as it does, all 
the essential characters of that family. 
14. ILYOPHILUS PERPLEXUS, sp.n, (Plate XIII. figs. 93-104.) 
Specific Characters.— FrmMae. Body (figs. 93 & 94) rather short 
and stout, more or less curved, and gradually attenuated from 
before backwards, with no sharp demarcation between the 
anterior and posterior divisions. All the segments of the body 
sharply defined, and having the hind edge somewhat raised but 
quite smooth. Cephalic seement very large and broad, with a 
slight dorsal depression about in the middle, and with the lateral 
parts boldly curved anteriorly. Rostral projection evenly rounded 
at the tip and densely clothed with fine hairs (see fig. 95). The 
four succeeding segments comparatively short and obtusely pro- 
duced later: ally. Urosome almost as long as the anterior division ; 
