Microscopical Essays. 



607 



By it's motion it refembles the hiraantopus ludio, but differs 

 from it in figure and Fituation of the parts. The body is rather 

 depreffed and long, the hinder parts acute, and generally curved, 

 pellucid, filled with granular molecules. 



281. Himantopus Charon. 



Himantopus cymbseformis fulcata, in fovea ventrali cirrata. 

 Boat-lhaped furrowed himantopus, the hollow part of the belly 

 cirrated. . 



An oval pellucid membrane, the fore-part hairy, furrowed 

 longitudinally, each fide bent up fo as to form an intermediate 

 hollow place, or belly^ crammed with grey molecules - 3 beneath 

 the middle it has feveral bent diverging rows of hairs ; no hairs on 

 the hinder-part. Rarely to be found, and then in fea-water. 



282. Himantopus Corona. 



Himantopus femiorbiculata, depreffa, in utraque pagina cirra- 

 ta. Semiorbicular himantopus, flattened, both fides cirrated. 



A membranaceous lamina, very thin, very pellucid, cryflalline, 

 femilunar: the edge of the bafe thick fet with molecular in- 

 terlines, the other angle, or fore-part, furnifhed with fhort hairs, 

 or a kind of mane; towards the hind part three equal curved 

 hairs, or fpines. 



XVI. Vqr- 



