CANCROIDEA. 187 



each a rounded tooth on the inner margin, and no other dentation. 

 In a small individual, ten lines long, otherwise similar, the fingers 

 have each three subacute teeth on the inner margin. 



The female abdomen is elliptical, with the penult joint longer than 

 either the preceding or the following. 



Figures If, g, 7i, pi. 10, represent a young female of this species. The 

 outline is more fully semicircular in front, and the lateral angles are 

 hardly as prominent. There is a slender but strong sulcature on the 

 outer side of the dorsal margin of the moveable finger, and another 

 below on the thumb, both of which are obsolescent in adults; the 

 teeth of the fingers are as in the small specimen of the male alluded 

 to, each finger having three teeth. The abdomen is broadest at the 

 third joint, and from this, narrows somewhat towards the apex; the 

 penult segment is the longest. 



Length of carapax, six lines; greatest breadth, eight and three- 

 fourths lines ; ratio of length to breadth, 1 : T46. 



Etisus Icevimanus, Jour. Acad. Nat. Sci. Philadelphia, viii. 115. 



ETISODES FRONTALIS. 



Carapax vix nitidus, minus transversus ; antice areolatus, postice planw, 

 areolis fere planis, areold 2 M simplice; f route producto, horizontali; 

 margine antero-laterali 5-dentato, dentibus suUriangulatis, dente poste- 

 riore (8} minore. Pedes antici inerines, manu supra mm Icevi, digito 

 mobili supra fere tricarinato, carpo granuloso, prope articulationem 

 manus prominente. Pedes 8 postici paulo pubescentes, articulo tertio 

 inermi. 



Carapax less transverse in form than in preceding species, hardly 

 shining ; anteriorly areolate, posteriorly plane, areolets nearly flat, 

 2M simple; front much produced, horizontal; antero-lateral margin 

 5-toothed, teeth subtriangular, posterior tooth (S) much smaller 

 than preceding. Anterior feet unarmed, hand not smooth above, 

 moveable finger somewhat tricarinate above ; carpus granulous, and 

 having a prominence adjoining the articulation with the hand. 

 Eight posterior feet somewhat pubescent, third joint unarmed. 



