i 7 i. 



Microscop ical Essays. 

 Leucophra Heteroclita. Fig. 44 and 45. 



Leucophra cylindrica, antice obtufa, poftice organo criftato 

 duplici exfertili. Cylindrical leucophra, the fore-part obtule, the 

 hind-part furnifhed with a double-tufted organ, which it can 

 thruft in or out at pleafure. To the naked eye it appears as a 

 white point, in the microfcope as a cylindrical body, the fore- 

 part obtufely round, the middle rather drawn in, the lower part 

 round, but much fmaller than the upper part. With a large 

 magnifying power the whole body is found to be ciliated. The 

 interlines are very vifible. It is reprefented in Fig. 44 as it gene- 

 rally appears, in Tig. 45 with the plumed organs, a the fore- 

 part, b the hind-part, d the hooked interlines, ii the plumes, g g 

 the fheaths from which they are projected. 



XIII. Trichoda, 



Vermis inconfpicuus, pellucidus, crinitus. An in vifible, pellu- 

 cid, hairy worm. 



172. Trichoda Grandinella. 



Trichoda fphaerica, pellucida, fuperne crinata. Spherical, 

 ;pellucid, the upper part hairy. 



A moft minute pellucid globule, the interlines fcarce vifible, 

 the top of it's furface furnimed with two, three, or more fhort 

 briflles, which are with difficulty feen, the animalculum extending, 

 6 and 



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