CYCLOPID^. 
201 
there is no heart, the circulation is caused by movements of the 
stomach, the intestine, and a membrane traversing the whole 
cephalothorax like a diaphragm, thus : the swelling of the 
stomach drives a part of the blood forwards into the various 
organs of the body ; and this is replaced during the contraction 
of the stomach by a quantity of blood driven forwards by a 
feeble dilatation of the intestine, and drawn in by the contraction 
of the stomach ; the contraction of the intestine then draws the 
blood from the lacunge in the feet and thoracic muscles ; thus 
the anterior part of the cavity of the body acts like a ventricle, 
and the posterior as an atrium of the heart. Observat. anatom, 
et physiolog. sur le genre Cyclops. Gcni^vc: 1871, pp. 1-40. 
The same author (/. c.,pp. 41-44) discusses the species of Cyclops observed 
near Geneva, and which prove to be smaller than in Germany. 
Cyclops lonyicornisj sp. n., id. 1. c. p. 44, pi. 1. fig. 3, environs of Geneva; 
C. hrevicornis (Glaus), id. ibid. fig. 1 ; first abdominal segment of serrulaius 
(Fischer) and hicuspidatus (Claus), id. ibid. figs. 2 & 4. 
C. pauper., sp. n., Fric, Arcli. Landesdurchf. Bdhm. ii. p. 223, woodcut, 
Podebrad, Bohemia. 
C. littoralis, sp. n., Brady, Ann. N. H. (4) x. p. 5, pi. 2. figs. 9-14, tidal 
pools near Whitley and Ryhope ; C. ovalis, sp. n., id. 1. c. p. 5, pi. 3. figs. 1 & 
2, off Sunderland. 
C. christianensis, sp. n., Bock, Forh. Selsk. Chr. 1872, p. 43, Christiania- 
fjord, also in salt water. 
Cyclopina longicornis, sp. n., id. 1. c. p. 41, Norway. 
Ilemicyclops, g. n. Jaws with a strong, unarticulntcd palpus, bearing on 
its tip many feathor-liko bristles; first pair of maxillipods 2-j()lntod, second 
4-jointcd, both strong. Branches of the four anterior feet 3-jointed ; last pair 
of feet 2-join ted, blade-like. H, purpureus, sp. n., id. 1. c. p. 42, Norway. 
Bocclda, g. n. [^Crustacea) Malm, 1870]. Like Cyclops; upper antenna3 very 
short, 6-jointed; swimming-feet short and broad. Mouth-organs totally 
different from those of any of the allied genera (but not described). B. 
arenicola, sp. n., Brady, Ann. N. H. (4) x. p. 6, Seaton Carew, N.E. England. 
Pseudocyclops, g. n. Right upper antenna of male without a hinge-joint, 
but much swollen in the middle; lower antennre 2-jointed. First pair of 
feet of male very complex in structure, the internal branch of one side pro- 
duced into a powerful sickle-shaped clasping-joint, the whole resembling 
very closely the male copulative organ of some Ostracoda. P. crassicornis, 
sp. n., id. 1. c. p. 7, pi. 2. figs. 1-8, off Seaham harbour, N.E. England. 
Cyclopicera, g. n. Upper antennae many-jointed, bearing a sword-shaped 
appendage near the distal extremity, resembling that of the Ilarpactidcc. C. 
lata, sp. n., id. 1. c. pp. 8 & 9, pi. 3. figs. 3-8, Roker, England, in rock-pools. 
HARPACTIDiE. 
This family is divided into 5 subfamilies, including the Peltidiidcc of Claus, 
by Bock, Forh. Selskr. Chr. 1872, pp. 43, 44, 68, & 69, as follows : — 
a. Lonyipedinm : second pair of maxillipeds foot-like, not prehensile. Ec- 
iinosoma, Zosime, Bradya. 
o 2 
