40 PROF. G. 0. SARS ON THE COPEPODA [Jan. 12, 
legs in male transformed, carrying near the tip outside a strong 
spiniform appendage. Last pair of legs comparatively small, 
distal joint with generally six very unequal and partly spiniform 
marginal sete, inner expansion of proximal joint rather short and 
provided with four spiniform setze; these legs in male, as usual, 
still smaller and with the number of sets reduced. Ovisacs in 
female narrow and closely juxtaposed, each containing a very limited 
number of ova. In some cases arranged in a single row. 
Remarks.—This genus was established by the present author 
in the year 1905 *, to comprise a species, S.. longicauda G. O. Sars, 
found in a brackish lagoon on the Chatham Islands. It was, 
however, subsequently + withdrawn, as I found it somewhat 
ditticult to distinguish it exactly from the much diversified genus 
Amphiascus G.O. Sars. Having, however, now become acquainted 
with a number of new species agr eeing with that originally 
observed in the more essential char aoa Se I am disposed to restore 
the present genus, which seems to form a quite natural group. 
None of the Norwegian species of Amphiascus can properly be 
referred to it. On the other hand, a well-marked species oceurs 
in the Caspian Sea, and another species I have recently found in 
a sample from the brackish lake, Birket el Qurun, in Egypt. 
In the present collection I have determined no less than eight 
different species, to be described below. 
6. SCHIZOPERA INOPINATA, sp.n. (Plate X. figs. 43-58.) 
Specific Characters.—FrMaun. Body (figs. 43 & 44) moderately 
slender and of the usual subcylindric form, with the anterior 
division longer than the posterior. Rostrum (see fig. 45) rather 
prominent, narrow lanceolate in form, and somewhat curved at the 
tip. Last caudal segment (see fig. 55) shorter than the preceding 
one, and having ‘ne. anal opercle - very small and perfectly smooth. 
Caudal rami about the length of that segment and rather diver- 
gent, being gradually narrowed distally, inner edge straight and 
very finely ciliated; spine of outer edge attached about in the 
middle, dorsal seta somewhat nearer the tip, the latter narrowly 
truncated and armed above the insertion of the apical setee with 
a transverse row of four small denticles. Anterior antenne (see 
fig. 45) comparatively slender, though not nearly attaining the 
length of the cephalic segment. Posterior antenne (fig. 46) 
remarkably short and stout, with the outer ramus (fig. 47) very 
narrow. Oral parts (figs. 48 & 49) of the structure characteristic 
of the genus. First pair of legs (fig. 50) with the outer ramus 
about the length of the Ist joint of the inner, and having the 
last joint considerably longer than the other two 05 inner ramus 
distinctly 3-articulate, w ith the last two joints incurved and 
combined scarcely attaining half the length of the 1st; last joint 
armed at the tip with a Bentler claw-like spine and two unequal 
* Zool. Jahrbiicher, Bd. xxi. Heft 4, p. 383. 
+ Account of the Crustacea of Norway, vol. v. p. 148. 
