dU PROF. G, 0. SARS ON THE COPEPODA (Jan. 12, 
to raise these groups to distinct genera or subgenera. In the 
present paper I find it, however, appropriate to retain the old 
generic name Cyclops for all the species here recorded, though 
they are enumerated in a definite succession according to their 
affinity. 
15. Cyctors teucKartr Claus. (Plate XIV. figs. 105-107.) 
Oceurrence.—This truly cosmopolitan species was found in 
several of the samples from all three lakes. In some of the 
samples from Tanganyika it occurred in great abundance, and 
may, together with Diaptomus simplex, form a chief part of the 
surface-plankton of that lake. In a sample from Nyasa, taken 
13/6/04 in the Anchorage Bay, a smaller variety occurred not: 
unfrequently. For comparison with the two succeeding species, 
I give on the accompanying plate a figure of a typical female 
specimen from Victoria Nyanza, together with two detail- 
figures. 
16. Cycrors emtnt Mrazek. (Plate XIV. figs. 108-112.) 
Cyclops emini Mrazek, Die Copepoden Ost-Afrikas, p. 4, pl. u. 
figs. 1-3, 5, 6, 8. 
Specific Characters.— FEMALE. Body (fig. 108) rather slender, 
with the anterior division oblong-oval in form and shghtly widening 
anteriorly, front narrowly truncated. Last pedigerous segment 
small, not produced laterally. Urosome slender and narrow, 
considerably exceeding half the length of the anterior division ;. 
genital segment only very slightly widening in front. Caudal 
rami (fig. 112) much longer than the anal segment and rather 
narrow, being somewhat divergent ; seta of outer edge attached a. 
little behind the middle ; innermost apical seta more than twice as. 
long as the outermost, but considerably shorter than the outer 
mediate one; dorsal seta unusually long and slender, extending 
beyond the innermost apical seta. Anterior antenne very long 
and slender, almost attaining the length of the whole anterior 
division, and 17-articulate. Posterior antenne (fig. 109) likewise 
anusually slender, with the terminal joint narrow linear in form, 
and the penultimate joint only provided with four anteriorly- 
curving sete. Natatory legs with the rami comparatively long 
and slender ; inner ramus of fourth pair (fig. 110) with the two 
apical spines very unequal, the inner one rather slender, the outer 
scarcely more than one-third as long, both distinctly denticulate. 
Last pair of legs (fig. 111) very small, distal jomt narrow oblong 
in form, and having the lateral spine longer than the apical seta. 
Ovisacs comparatively small and somewhat divergent, each with 
a rather limited number of ova. 
Leneth of adult female 0°79 mm. 
Remarks.—This form has been described, though somewhat 
imperfectly, under the above name by Dr. Mrazek. It is closely 
allied to the European species, C. oithonoides G.O. Sars, exhibiting 
a very similar external appearance, though at once distinguished 
