GENERAL CLASSIFICATION 149 



TABLE OF CRUSTACEANS. 



Order 1. — Sessile -eyed Crustaceans. 

 Eyes sessile and immovable. 

 Wood-louse. Cephaloculus. 



Ligia. Amymone. 



Asellus. Daphnia. 



Cyamus (whale-louse). Lynceus. 



Shrimp. Osole. 



Caprella. Limulus [Apus, not the 



modem Limulus. H. E.]. 



— Caligus. 

 Cyclops (water-flea). Polyphemus. 

 Zoea [Decapod larva. H. E.]. 



Order 2. — Stalk-eyed Crustaceans. 

 Two distinct eyes, raised upon movable stalks. 

 ( 1 ) Elongated tail, furnished with swimming blades, or hooks or setae. 

 Branchiopod. Pagurus (hermit-crab). 



Squilla. — 



Palaemon. Ranina. 



Crangon. Albunea. 



Palinurus (rock-lobster). Hippa (sand-crab). 



Scyllarus. Corystes. 



Galathea. Porcellana. 



Cray-fish. 



(2) Tail short, unthout appendages, and applied to the lower surface 

 of the abdomen. 



Pinnotheres. Dr)rippe. 



Leucosia. Plagusia. 



Arctopsis. Grapsus. 



Maia. Ocypode. 



— Calappa. 

 Matuta. Hepatus. 

 Orithyia. Dromia. 

 Podophthalmus. Cancer. 

 Portunus. 



ANNELIDS. 

 (Class "VTII. of the Animal Kingdom.) 



Oviparous animals with soft elongated bodies, with transverse rings ; 

 they rarely have eyes or a distinct head and are destitute of jointed legs. 



Arteries and veins for circulation ; respiration by gills ; a ganglionic 

 longitudinal cord. 



Observations. 

 We find in the annelids that natm-e is striving to abandon the type 

 of articulations which she always used in the insects, arachnids and 



