H Y D R A. 



Though there are feveral fpecies of this genus, I mail 

 mention but two of them, and thefe differ but little from 

 each other, which is chiefly in the number and length of 

 their feelers. 



I mould not have introduced this genus, but that the 

 knowledge of the properties of this animal tends greatly 

 to illuftrate the nature of Zoophytes in general ; as this 

 alone belongs to the frefli water, and all the others, are, 

 inhabitants of the fea. 



Q 



i. Hydra fufca. 



Hydra tentaculis fuboc- 

 tonis longifimts. 



Ellis Corallin. tab. 28, 



Longarmed frefh-water Polype, 



This frefh-water polype has 

 very long arms, often 8 in 

 number, and feveral times 

 longer than its body. 



fig. C. (The claws are here 

 fhortened, for the conveniency of introducing them within 

 the flze of the plate.) 



Hydra fufca, Linn, Syft. Nat. Ed. 12. pag. 13:20. 



„ tt 1 1 The commo?t frefh-water Polype 



2. Hydra vulgaris, r J 7 J 7 . 7 J * 



J ° of the ditches. 



Hydra tentaculis Ion- This, frefh-water polype has 



gioribus fubfeptenis^ cor- longifh arms, generally about. 

 pore lutefcente poftice at- 7, which are twice as long as 

 tenuato. its body ; it is of a yellowifli 



color, and fmaller towards the 



bottom. 



Frefi-water Polype. Phil. Tranf. Vol. 57. pag. 430. 

 tab. 19. 



Hydra grifea. Linn, Syft. Nat, Ed. 12. pag. 1320. 



C la 



v 



