-Mi c r o s cop rc a l E ss a y s. 



165. Leucophra Signata. 



Leucophra oblonga, fubdeprefla. Oblong fubdepreffed leu- 

 cophra, with a black margin, filled with little molecular globules, 

 but more particularly diftinguimed by a curved line in the mid- 

 dle, fomething in the fhape of a long S ; one end of this is at 

 times bent into a fmall fpiral. Common in fait water, in the 

 months of November and December. 



166. Leucophra "Trigona. 



Leucophra crarTa, Obtufa, angulata, flava. Thick, obtufe, an- 

 gular, and yellow leucophra. 



A triangular yellow mafs, filled with unequal pellucid veficles, 

 one of which is much larger than the reft, the edge furrounded 

 with little fluctuating hairs. It is not common. Was found in 

 a marfhy fituation. 



167. Leucophra Fluida. 



Leucophra fubreniformis, ventricofa. Leucophra fomewhat 

 of a kidney {hape, but ventricofe. 



168. Leucophra Fluxa. 



I Leucophra fmuata reniformis, Reniform finuated leucophra. 



169. Leu« 



