10 - ZOOLOGY. 
Orver 1. Hyprosratica. Pl. 74, fig. 5, Diphies. 
«2. AcatepHta. Medusa. Pl. 74, fig. 6, Velella. 
Class 4. Echinodermata. 
Radiated animals with a hard integument, like those on pl. 76 Jigs. 60 
to 71. Some have and some are without locomotive organs. 
Orver 1. Eprepicernata. ‘Pl. 74, fig. 7, Sipunculus. 
“2. Prepicettata. P1. 74, fig.8, Holothuria, Asterias, Echinus, &c. 
Class 5. Intestina. 
In this class (excluding the Annelida) Cuvier placed the intestinal worms, 
and others which bear some resemblance to them, but which are not 
confined to the internal parts of animals. 
Orver 1. Entozoa (Cavitaria, Cuvier). Pl. 74, fig. 9, Lrgula. 
“ 2. Steretmintua (Parenchymata, Cuvier). fig. 10, Nemertes. 
Division II. Moxuusca. 
Class 1. Acephala. 
This class has no proper head, the mouth opening immediately into the 
anterior part of the body. The gills are suspended upon each side of the 
body. The Tunicata are without an-external shell; the Conchitera have a 
bivalve shell. 
Orper 1. Tunicata. Pl. 74, fig. 11, Botryllus. Pl. 77, fig. 3, Salpa. 
“2. Coycutrera. PI. 74, fig. 12, Ostrea. See also pl. 76, figs. 25-50. 
Class 2. Gastropoda. 
In this class locomotion is effected by means of a fleshy disk, called a 
foot, upon the lower surface of the body. The orders are distributed 
according to the structure of the branchie. This class is abundant in 
species, and includes the greater part of the univalve shells. 
Orper 1. CycLoBRANCcHIATA. - a 4 » IY: 13, Chiton. 
¢¢ =, ScuTIBRANCHIATA. 14, Fissurella. 
¢ 63. Tusutiprancamata. “ 15, Vermetus. 
«¢ = 4, CTENOBRANCHIATA. Oi 16, Strombus. 
«© =. Hereropropa. co 1T, Carmnaria. 
‘© 6. TECTIBRANCHIATA. CMe Saanh la. 
«4%. InveroprancamaTa. “ “ 19, Phyllidiwm. 
“¢ 8. NuprpraNncaiata. cc 20, Tretonium. 
“¢ 9. PuLmonata. <  “ 91, Lamnea. 
