632 CLASS X. 
Family VII. Copepoda Latr., Epw. (Cyclopide Burn.). 
Body oval, attenuated posteriorly, terminated by two appendages, 
as if by a forked tail. Maxille and foot-jaws various in num- 
ber, lamellose, setigerous. Antenne two or (in many) four. 
Natatory feet mostly eight, cloven into two oars. 
This family is very closely allied to Caligus, Ergasilus, and some 
other genera of the preceding order, from which it is distinguished 
by the absence of the suctorial beak, and especially by the longer 
antenne. : 
A. Kye single, frontal. 
Cyclops MUELLER (Monoculus L. in part). 
Add sub-genera: Cyclopsina, Arpacticus Epw. and Notodelphys 
ALLMANN. 
These little animals are to be met with almost every where in water, even 
in puddles, gutters, and cisterns of rain-water. The Cyclopsina alpestris of 
C. Voer was found at a height of 8500 feet in water of the glacier of the 
Aar; Neue Denkschr. der allg. Schweizer-Gesellsch. f. d. gesammt. Natur- 
wissench, VII. pp. t7—I9. 
The young (comp. above, p. 612) have no tail, and a smaller number of 
feet. The adult female differs from the male in having two oval sacs which 
she bears about with her, and which are filled with eggs; some species, 
instead of two, have only a single sac attached to the middle of the body 
beneath. 
Sp. Cyclops vulgaris Leacw, Monoculus quadricornis L., Rasen Ins, 11. 
Suppl. Tab. 98, Murnn. Lntom. Tab. 18, DEsmaR. Crust. Pl. 53, figs. —4; 
very common in almost all fresh water, so that of a certainty every one has 
often swallowed this little animal. They may be frozen in the water, and 
after continuing motionless for days, be restored when the water is thawed, 
after some hours, from their torpor to their former activity. They are 
ordinarily thickly beset with Vorticelle. The copulation and impregnation 
have been illustrated by SIEBOLD’s observations!. 
B. Eyes two. 
Genera: Pontia Epw., Cetochilus RoussEL DE VAUZEME, Hersilia 
Puiuipri, Peltidium Putuiprt, Saphirina Taompson, Cananus 
Kroyer (not LEacn). 
Comp. Mitng Epwarps Ann. des Sc. nat. Tom. 13, pp. 295—297, 1b 
14 ;—ROUSSEL DE VAuzEME Description de Cetochilus australis, Ann. des 
1 Beitriige zur Naturgesch. der wirbellosen Thiere. Danzig, 1839, 4to. pp. 36—50. 
