ANALYTICAL INDEX. 



28^ 



CHAPTER lY .—continued. 



Feeds voraciously, and swims swiftly, . . page 229 



Exuviation at different seasons, ... ib. 



Plate LXIII. explained, ..... ib. 



§ 5. Oniscus (Ideotea) entomon, .... ib. 



Baron de Geer had never seen a living specimen, . . ib. 



Animal described, length, form, organs, &c., . . 230 



Darts swiftly through the water, . . . . ib. 



Feeds greedily on animal substances, ... ib. 



Plate LXIII., explained, . . • ' • . ib. 



§ 6. AsELLUS MEDUSiE, . . • • • "b. 



Two parasites frequent the Medusa, resembling the Cyclopean 



race among the Entomostraca, ... ib. 



Length, organs, &c., . . • • . ib. 



Dwells as a parasite on the Medusa — swims swiftly, . 231 



Spawn, .....•• ib- 



Plate LXII. explained, .... ib. 



B. AsELLUS MEDUSA, 



232 



Form and habits described, .... ib. 



C. — Cyclops stagnoeum, ....••!"• 



Observations of Baron de Geer, Miiller, and Baird, . ib. 



Cyclopean race characterised by one eye only, . • ib. 



Animal described, ..... ^■'^ 



Ova, i''- 



Inhabits fresh-water pools, .... ib. 



Plate LXII. described, . . . . • . ib. 



D. — Cyclops punctatus, . . . . • ib. 



Cyclopean race dwell both in the fresh-waters and in the sea, ib. 



Punctatus a minute animal, &c., ... ib. 



Moves swiftly by jerks through the water, . . . 234 



Plate LXII. explained, .... ib. 



E. — Cyclops fasciatus, — Belted Cyclops, . • . ib. 



Its form, &c., described, .... ib. 



Plate LXX. described, . . . . • ib- 



§ 7. Nymphon gracilis, . . . • • •"• 



Styled the Spider Crab, . . . . • ib. 



