CONTEXTS OF VOL. II, xlix 



Page, 



2. Body naked, a. With terminal suckers. Hirudo, 

 Glossopora, Erpobdella, Pontobdella, Phyllene, 

 Trochaetia. b. Platfariadae, Gordiusidae. . ib. 



Order II. Habitation internal. 

 Entozoa; 



Tribe I. Mouth and anus at the opposite extremities. 

 Filaria, Hamularia, &c. . ' . 606 



Tribe II. Mouth and anus not at the opposite extre- 

 mities. 



A. Echinorynchus, Haeruca. . . 6'0? 



B. Taenia, Cysticercus. . . ib. 



C. Monostoma, Amphistoma. . . ib. 



D. Ligula, . ib, 



II 



RADIATA. 



Class I. Echinodermata. 

 Order I. Intestine open at both extremities. 



Section I. With suckers. 



Tribe I. Echinida. A. Scutella, Clypeaster, Fibu- 

 laria, Echinoneus, Galerites, Ananchytes, Spatan- 

 gus. B. Cassidulus, Nucleolites, Echinus, Cida- 

 rites. . . . 608 



Tribe II. Fistulida. Holothuria, . 609 



Sect. II. Destitute of Suckers. 



Molpadia, Menyas, Sipunculus, . . 609 



d 



