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Microscopical Essays. 



the hinder-part furniftied with two fafcicles of ftrait and curved 

 hairs. 



The body flat, and filled with molecules ; in the fore-part 

 there is an oblong empty fpace, into which, under certain cir- 

 cumftances, we may fee the water as it were fucked in. ' 



253. Trichoda Pulex. Fig. 12, Plate XXVI. 



Trichoda ovata, antice incifa, fronte & bafi crinita. Egg- 

 fhaped, with an incifion in the fore-part, the front and the bafe 

 hairy, a the anterior, b the pofterior part, c the incifion. 



254. Trichoda Lynceus. Fig. 16, Plate XXVI. 



Trichoda fubquadrata, roftro adunco, ore crinito. Nearly 

 fquare, with a crooked beak, the mouth hairy. 



At firft fight it does not appear very diffimilar to fome of the 

 monoculi. The body is membranaceous, and as it were cdm- 

 preffed, being broad without thicknefs, flretched out into a beak 

 above, the lower part truncated ; under the beak is a little bun- 

 dle of hairs, the lower edge bends in and out, and is girt round 

 with a few briftles. The interlines are beautifully vifible, a fmall 

 bent tube goes from the mouth to the inteftines in the middle of 

 the body ; thefe, as well as the tube, are in frequent agitation ; 

 another tube is alfq perceivable between the fore and hind edge. 

 It is -filled with a blue liquor, a the beak, b the mouth, c the 

 bafe. 



252. Tri- 



