SXa GENUS DIASTYLia. [July, 



other tkan palpi, and have described them as siich^ 

 Immediately under these external pedipalps is a much 

 smaller distinct and filiform pair. The exterior an- 

 tennae are concealed each side beneath the deflected 

 margins of i\\<i thorax. The eyes are probably very 

 retractile, and placed below the antenme : I did not 

 discover them. 



I found but a single individual in a handful of san(J 

 taken from one of those pools which are frequented by 

 Lepidactalis, 



? Cancer esca, Gmel., an inhabitant of the Nor* 

 way sea, said to be the chief food of the Herring, will, 

 judging from the description, form a third species of 

 this genus. Mr. Moutagu considered it similar ta 

 C. scorpioides. 



By the bifid feet Diastylis claims kindred to the gc* 

 jiera Mysis and Nebalia; and v» hen placed immediate* 

 ly in succession to the latter, will contribute another 

 link, by which the Macrourse, through the medium of 

 the Schizopodai, are conneted to the Monoculii by 

 Cyclops, the most proximate of the genera of tjiat qx^ 

 der,. 



Order IIL 



A3IPniP0DA. latr. 



Head distinct from the thorax, and simple ; eyes im^ 

 moveable, fixed in the shell ; mandibles palpigeroiis, 

 ^liree pairs of maxill^; exterior ones reisembling ^ lip 





