6 4 8 



Microscopical Essays. 



370. Brachionus Dentatus. 



Brachionus bivalvis, tefta arcuata, apice et bafi utrinque den- 

 tata, cauda fpina duplici. Bivalved brachionus, with an arched 

 fhell, the apex and the bafe are both toothed, the tail formed of 

 two fpines. 



371. Brachionus Mucronatus. 



Brachionus bivalvis, fubquadrata, apice et bafi utrinque mu- 

 cronata, cauda fpina duplici. Bivalved, fomewhat of a fquare 

 form, the bafe and apex pointed, the tail confining of two fpines. 



372. Brachionus Uncinatus. Fig. 55, Plate XXVI. 



Brachionus bivalvis, tefta ovali, apice Integra, bafi mucronata, 

 cauda rugofa bifeta. Bivalved brachionus, with an oval fhell, 

 the apex even, the bafe pointed, two thick briftles for the tail. 



This is one of the fmallefl bivalved animalcula, the apex and 

 anterior part round, the^hinder-part ftrait, terminating in a point, 

 mufcular, furnifhed with a hook on the fore -part, a final 1 rotatory 

 organ, a tail compofed of joints, long, and cloven at the end into 

 two briftles. It can open it's fhell both at the fore and hind-part, 

 a the fhell when clofe, c the poller ior point, d the animalculum, 

 h the tail, i the briftles. 



373. Bra- 



