212 CRUSTACEA. 



and at first sight the species appeared to be a Xantho, yet the points 

 shut on one another. 



Lagostoma nodosa, J. W. RANDALL, J. Acad. Nat. Sci. Philad., viii. 111. 



CHLOEODIUS CAVIPES. 



Carapax non nitidus, latere rotundatus, superficie antice areolatus, 

 areolis partim granulosis et imbricato-granulosis ; fronte fere recto, 

 emarginato, margine antero-laterali crassiusculo, 8Q-dentato, dentibus 

 D, d', E, E, N (vel N, N), T, S, ', totis parvulis, D vix saliente. 

 Pedes antici incequi, valde granulosi et corrugati, ma/nu infra breviter 

 villosd et granulosd, digito mobili canaliculate, supra denticulate. 

 Pedes 8 postici paulo asperati, articulo tertio breviter pubescenfe, 4 to 

 bene bicristate, cristis tenuibus camtatem elongatam indudentibus, 5te 

 tarsoque omnino breviter hirsute, tarso brevi. 



Carapax not shining, rounded either side, surface anteriorly areolate, 

 areolets partly granulous and imbricato-granulous ; front nearly 

 straight, emarginate, antero-lateral margin somewhat stout, 8-9- 

 toothed, teeth D, d', E, E, N (or N, N), T, S, ', all small, D 

 scarcely salient. Anterior feet unequal, strongly granulous and 

 corrugate, hand short villous and granulous below, moveable finger 

 channeled and denticulate above. Eight posterior feet rather 

 rough, third joint short pubescent, fourth prominently bicristate, 

 the crests thin and including an oblong cavity between them, fifth 

 joint and tarsus throughout short hirsute, tarsus short. 



Plate 12, fig. la, female, enlarged two diameters; b, abdomen of 

 female. 



Locality uncertain. 



Length of carapax of female, seven lines; greatest breadth, ten and 

 one-fourth lines; ratio, 1 : 1'46. The carapax is rather rough and 

 uneven about the antero-lateral region towards the margin, and the 

 other areolets have interrupted rugae of granules, or scattered isolated 

 granules. The most striking character is in the bicristate fourth joint 



