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Microscopical Essays. 



confiderably beyond the body, the bafe divided into three fmall 

 horns, at the end of the tail there are two hairs. 



365. Brachionus Patella. 



Brachionus u nival vis, tefla ovata, apice bidentata, i>afi emar- 

 ginata, cauda bifeta. Brachionus with a univalve oval fhell, two 

 teeth at the apex, the bafe notched, two briftles at the tail. 



The (hell plain, oval, orbicular, cryftalline, the anterior part 

 terminating in two acute points on both fides, though the head 

 of the animal for the moft part fills up the intervening fpace. 



The head, the tail, and the trunk are very diftincT: ; the bottom 

 of the trunk is terminated in a femicircle, the fore-part marked 

 with two tranfverfal lines ; it occupies the difc of the fhell. The 

 inteftines are indiftincl, the tail is affixed to the trunk ; it is 

 fhort, annulated, flexible, the middle projecting beyond the 

 fhell, the apex diverging into two very fine briftles (g); it fallens 

 itfelf by thefe, artd whirls about with the body ered ; the rota- 

 tory cilia (c) are with great difficulty perceived. Found in 

 marfhy water all the winter. 



366. Brachionus Braclea. 



Brachionus univalvis, tefta fuborbiculari, apice lunata, ban 

 Integra, cauda fpina duplici. Univalved brachionus, the fhell 

 rather orbicular, the apex lunated, the bafe fmooth, the tail fur- 

 nifhed with two fpines. 



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