Microscopical Essays, 



599 



260. Trichoda Cicada. 



Trichoda ovalis, margin ibus obfcuris, antice & fubtus crinita, 

 poftice mutica. Oval trichoda, with an obfcure margin, the 

 fore-part underneath fet with hairs, the hinder-parts beardlefs. 



It does not differ confiderably from the preceding, though M. 

 Muller has pointed out fome {hades by which they may be dif- 

 criminated. 



XIV. K e r o N A, 



Vermis inconfpicuus corniculatus. Ah invifible worm with 

 horns. 



261* Kerona Raftelkim. 



Kerona orbicularis membranacea, nafuta, corniculis in tota 

 pagina. Membranaceous orbicular kerona, with one projecting 

 point, the upper furface covered with fmall horns. There are 

 three rows of horns on the back, which nearly occupy the whole 

 of it. It was found in river water. 



262. Ke 



