99 



naked eye practically smooth ; the carpus has a strong shcirp spine— with a 

 small accessory cusp at base— at its inner angle ; the fingers are a little longer 

 than the palm, are stout and compressed, and, in the larger cheliped, they gape, 

 but not immoderatelj', when the tips are apposed. 



The legs are strong, but are shorter even than the smaller cheliped ; the 

 longer propodites are barely twice as long as broad, and are nearly as long as 

 their dactyli. 



In fresh-preserved specimens the carapace is either speckled or mottled, 

 but not in specimens that have been many years in spirit. 



In two large males the carapace is 1^ inch long, 2h inches broad, and fths 

 inch deep; in two large females it is 1,"« inch long, 21 inches broad, and tWths 

 inch deep ; in some small males it is Rths inch long and only }Hhs inch broad. 



Almost all the above have the post-orbital tubercle said to be characteristic 



of " Potamon " ivagrakarowensis. 



