60 PROF. G. 0. SARS ON THE COPEPODA (Jan. 12, 
slender, with the anterior division oblong-oval in form and nar- 
rowly truncated in front. Last pedigerous segment with the 
lateral parts slightly produced and finely hairy. Urosome ex- 
ceeding half the length of the anterior division, and having the 
genital segment somewhat dilated in front. Caudal rami (fig. 192) 
about half the length of the remaining part of urosome and 
somewhat divergent, outer edge armed with a comb-like row of 
rather strong denticles extending almost to the base of the ramus ; 
innermost apical seta very thin and quite naked, being more than 
twice as long as the outermost, the latter pronouncedly spiniform 
and pointing almost straight outwards, its anterior edge fringed 
with fine spinules, posterior edge smooth ; middle sete slender and 
uniformly ciliated, the inner one exceeding the outer by rather 
more than one-third of its length. Anterior antenne scarcely as 
long as the cephalic segment, and 12-articulate; last and penulti- 
mate joints (see fig. 190) each provided with a finely denticulated 
longitudinal keel. Fourth pair of legs (fig. 191) with the spines 
attached to the terminal joint of both rami unusually large, 
lanceolate in form, with a dense fringe of delicate spmules on 
each side, Last pair of legs not examined. Ovisacs of moderate 
size and oval in form, slightly divergent. 
Length of adult female 0°79 mm. 
Remarks.-—This form is especially distinguished by the very 
conspicuous comb-like series of denticles on the cuter edge of the 
caudal rami, the strong spiniform outermost apical seta, and 
finally by the unusual development of the spines attached to the 
terminal joint of both rami in the fourth pair of legs. It is from 
this latter character that the specific name here proposed is 
derived. 
Occurrence-—Two female specimens of this form had been 
mounted by Dr. Cunnington, together with some other Ento- 
mostraca, on a slide, which was kindly sent to me for examination. 
Accor ding to the label, they were collected from the Lofu river, 
Tanganyika. 
31. CYcCLoPs CILIATUS, sp.n. (Plate XX. figs. 193, 194.) 
Specific Characters.— FEMALE. Body (fig. 193) resembling, as to 
the general form, that of the preceding species, though perhaps 
somewhat less slender. Caudal rami (fig. 194) comparatively 
narrower, with the denticles of the outer edge smaller, inner edge 
clothed throughout its whole length with delicate, somewhat 
distant cilia; innermost apical seta distinetly ciliated and only 
slightly exceeding in length the outermost; the latter moderately 
strong, with the outer edge minutely denticulated, the imner 
clothed with long cilia; middle sete rather slender, with the cilia 
of the proximal part coarser and more distant than those of the 
distal part, the inner one almost twice as long as the outer. 
Anterior antennz more slender and elongated than in the pre- 
ceding species, with no keel on the outer joints. Fourth pair of 
legs with the spines of quite normal appearance. Last pair of 
legs (not figured) with the spine of the inner corner very small. 
