316 DESCRIPTION OF [Polijgastrica. 



531. OphryogLiENA atra {Leucophra mamilla, M.) 

 I'he black Ophryogleiia. — Body blackish, compressed, acute 

 posteriorly. The cilii are white, the eye black, and situated 

 near the frontal dorsal margin. The mouth aperture forms 

 a funnel-shaped cavity, commencing immediately beneath 

 the brow; within this cavity Ehrenberg thinks he has 

 lately seen an oval bright gland. The white cilii appear 

 like silver fringe, especially those anterior. Found in turf 

 hollows. Size 1-1 80th. 



532. Ophryoglena acuminata. The tailed Ophryo- 

 glena. — Body brown- coloured, ovate, and compressed, 

 tail short and acute, eye red. The brow projects 

 beyond the mouth about the length of the body, or, in 

 other words, is situated about the middle. Figures 334, 

 335, are two views of the same animalcule. Found in 

 turf hollows. Size l-180th. 



533. OpiiRYOGL.E^ A Jlavicans. The yellowOphryoglena. 

 — Body yellow, turgid, ovate, attenuated and rounded 

 posteriorly, eye red ; the cilii near the mouth longer than 

 in the preceding species ; Ehrenberg counted from twelve 

 to sixteen rows at one view. Found in turf hollows. 

 Size 1-1 44th. 



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