230 
CRUSTACEA. 
pair of feet in the male very large, provided with three long flagelliform 
bristles. C. serrulata^ Atlantic and Pacific, spinirostris, Mediterranean, 
and magna, locality unknown, spp. nn., also C. rostrata and agilis (Dana), 
C. atlantica (Lubbock), and ? C, elegans and borealis (Sars). 
Halocypris (Dana) ; shell short, swollen, obscurely notched in front. 
Anterior antennae angularly bent, with one long bristle and four bristle- 
bags in both sexes, but larger in the male ; second pair of feet equal in 
both sexes. H. concha^ sp. n., Atlantic and coast of Chili ; also H. in- 
flata and hrevicornis (Dana), which are not specifically distinct, but 
described from females only, and Conchcecia obtusata (Gr. 0. Sars), also 
only known from the $ , and sp. ? from the South Sea, possibly identical 
with infiata (Dana). 
Halocypria^ g. n. ; shell nearly globose, distinctly notched in front ; 
antennae as in the preceding ; second pair of fSet in the female very 
short and broad ; male unknown. H. globosa, sp. n., Atlantic. 
C. Claus, Schriften zoologischen. Inhalts i, [1874], and Verb. z.~b. 
Wien, xxiv. [1874] pp. 175-178. 
OOPEPODA. 
Kossmann’s classification of the Copepoda [Zool. Rec. xi. p. 218] is rather 
severely criticized by C. Claus, Z. wiss. Zool. xxv. pp. 335-338 ; with 
several notes on the buccal organs of Lichomolgiis, Sapphirina, and other 
genera. 
ARGULlDiB. 
Argulus. C. Claus gives a full description of the whole structure, and 
especially the embryology of this genus, and comes to the conclusion 
that it is more nearly allied to the Copepoda^ as suggested by Milne- 
Edwards, than to the Phyllopoda, with which Zenker, Leydig, and lat- 
terly also Gerstacker have associated it. , This conclusion is founded on 
the whole arrangenaent of the segments, the structure of the antennae 
and buccal organs, the furcal appendages of the abdomen, and especially 
the fact (first established here by the author) that the legs in the larva 
are two-branched and oar-like, as in the other Copepoda. As, however, 
the differences in the legs of the adult animal, and some other points in 
the structure and development are very striking, the author proposes to 
divide the order of Copepoda into two sub-orders, (1) Branchiura (Thorell), 
for the ArguUdee^ and (2) Eucopepoda, for all the rest. According to the 
author, the respiratory function has its chief seat not in the tail, but on 
the ventral side of the dorsal shield, which is continually swept by the 
natatory feet ; the blood circulating in the caudal blade does not come 
direct from the heart, but from the cavity of the body, and it may serve 
rather as an accessory organ for the circulation. Argulus is only a sta- 
tionary parasite ; it can leave its host at will, and live several weeks 
without food, and even moult in this state ; the same species occurs on 
very different species of fish, e.g.^ A. foliaceus (L.), not only on carp, 
bream, tench, bleak, and other Cyprinidoe^ but on stickleback, pike, perch, 
and salmon-trout ; A. coregoni (Thorell), with which A. phoxini (Leydig) 
