f68 



ZOOLOGY. 



11. Tuhul&ria, S^em tubular, simple or branched, fixed by 



the base; aDimal proceeding from the extremity of the 

 tube, and liaving its head crested with teniacida, 



12. Corallina. Coralline. Animal in form of a plant ; 

 stem fixed, with calcareous subdivided branches, mostly 

 jointed. 



13. Sertularia, Animal as the last ; stem branched, pro- 

 ducing 'pclifpes from minute cup-shaped cells. Of this 

 genus there are two families ; * stem horny, tubular, 

 affixed by the base, and furnished with vesicles or ova- 

 ries containing polojpes^ <^ggs^ or living youn^ ; ** 

 stem crustaceous, inclining to ctoue, composed of 

 rows of cells ; vesicles wanting, in lieu of which are 

 small globules, 



14. Pennatiila. Sea-Pen. Animal not afExed, of various 

 shapes, supported internally by a bony substance, naked 

 at the base, the upper part with lateral ramifications ; 

 furnished with rows of tubular denticles^ producing 

 radiate polypes from each tube. 



15. Hydra. Polype, Animal affixing itself by its base, 

 linear, gelatinous, naked, contractile, and furnished 

 with setaceous tentaculUj inhabiting fresh waters, and 

 producing its deciduous offspring from its sides. 



