KADIATA. 



651 



the sexual organs united in each individual ; having no floating alimentary 

 BHO, a simple cavity in the anterior, and almost or totally destitute of nerves. 



Bothricephalus fatu?.— The Broad Tape Worm. Plate Ixxxvi. fii,'. 3, 

 Articulations of the body broader than long, minutely papillose, with an os. 

 iiilum in the middle of each articulation ; the head is small and the tail fre. 

 quently bifurcated. From 15 to 20 feet long. InhaDita the human body. 



Tcenia solium.— T\\e common Tape Worm. Plate Ixxxvi. fig. 2. Ue- 

 ecribed, vol. iv. page 410. 



CLASS XIII.— ACALEPHA. 



Having agelatinoua body, circular and radiated, with a soft and transparent 

 skin ; susceptible of considerable contraction and dilation. 



Actinia verrucosa.— The Great Actinia Plate Ixxxiv. fig. 6. Cylindrical, 

 glandular, red ; mouth appendiculated, with projecting tentacular. Inhabits 

 the coasts of Britain. 



CLASS XIV.— POLYPL 



Tlie animals are gelatinous, with elongated contractile bodies ; and pro- 

 vided with an alimentary sac, which has one opening; mouth terminal, 

 surrounded by radiated tentaculae ; the greater number of the species con- 

 gregated and adherent, and forming compound animals. See vol. iv. page 

 414. It consists of five orders. 



ORDER I. POLYPI NATANTES. 



The animals united in a common body, free, elongated, fleshy, enveloping 

 an inorganic axis, which is either cartilaginous, osseous, or stony ; and pro- 

 vided with radiated tentacula around the aperture of each polypus. 



VmbelhUariii Green/andica.— The Greenland Umbellaria. Plate Ixxxvii. fig. 

 I. Stem long, attenuated above, the polypi congregated in an umbel at the 

 apex. Inhabits the Northern ocean. 



Pennalula P/io.spfiorea.— The Phosphoric Pennatula. Plate l.xxxvii. (if,'. 

 9. Described, vol. iv. page 425. 



ORDER II. POLIPI TUBIFERI. 



The animals united in a common fleshy body, either simple, lobed, or with 

 ramifications, and constantly fixed by their base; without any solid internal 

 axis ; surface entirely or partly covered with tnbiform cylinders, rarely re- 

 tractile ; mouth terminal, with eight pectinated tentacula. 



Lobularia digitata.— The Fingered Lobularia. Plate Ixxxvii. fig. 2. Sos. 

 sile, pale rusty, gelatinous and fleshy ; the lobe from two to five inches thick 

 and obtuse. Inhabits the European seas. 



ORDER III. 11.ILIPI VAGIN.\TI. 



Each individual polypi, provided 'vith tentacula, constantly fixed in an 



