THE SPIDER CBABS OF AMERICA 287 



Genus NOTOLOPAS Stimpson 



Notolopas Stimpson, Ann. Lye. Nat. Hist. New York, vol. 10, 1871, p. 96; 

 type, N. lamellatus Stimpson. — Miers, Challenger Rept., Zool., vol. 17, 

 1886, p. 64. 



Carapace subpyriform, moderately convex, and rounded posteri- 

 orly; posterior margin more or less distinctly carinated, dorsal sur- 

 face bearing a few spines. Rostrum well developed, entire at base, 

 then bifurcating, horns divergent. Supraocular eave well developed, 

 furnished anteriorly ^^^th a small spine or tooth; a small tooth be- 

 tween the eave and the postocular cup, which is hollowed for the eye ; 

 inferior sinus broad. Basal article of antenna broad, a spine or tooth 

 at antero-external angle and a lobe or tooth on outer margin ; follow- 

 ing articles slender, not concealed by rostrum. Anterior margin of 

 merus of outer maxilliped truncate, inner angle variably emarginate. 



Chelipeds of adult male stouter than legs, palm slightly compressed, 

 fingers gaping at base. Ambulatory legs very slender, subcylindrical, 

 first pair considerably longer than the second, last thj'ee pairs dimin- 

 ishing regularly in length; dactyli curved and nearly as long as the 

 propodi. 



Inhabits both coasts of middle America, from North Carolina to 

 Bahia, Brazil, and from Manzanillo, Mexico, to Panama. 



KEY TO THE SPECIES OF THE GENUS NOTOLOPAS 



A '. A sharp, lamellate carina across posterior end of carapace. Basal antennal 

 article wide, having a broad shallow lobe on outer margin. 



lamellatus, p. 287. 

 A*. No sharp carina across posterior end of carapace. Basal antennal article 

 of moderate width, having a tooth or small lobe on outer margin. 



brasiliensis, p. 288. 



Species on both sides of the continent: lamellatus. 



NOTOLOPAS LAMELLATUS Stimpson 



Plates 81 and 238, fig. 1 



Notolopas lamellatus Stimpson, Ann. Lye. Nat. Hist. New York, vol. 10, 1871, 

 p. 97 (type-localities, Panama and Manzanillo; types not extant). — 

 Miers, Challenger Rept., Zool., vol. 17, 1886, pp. 64 and 65, pi. 8, fig. Ic. 



Diagnosis. — A sharp, lamellate carina around carapace above pos- 

 terior margin. A broad, shallow (little projecting) lobe on outer 

 margin of basal antennal article. Antero-internal outline of merus of 

 maxilliped oblique, slightly notched. 



Description. — Posterior half of dorsum flattened, enclosed by a ridge 

 which posteriorly becomes a broad concave lamella projecting over 

 the posterior margin; four equidistant spines on this margin, two 

 median, the gastric spine at the highest point of the carapace, the 

 other two branchial, above the widest part of the carapace. Cardiac 

 region a rounded nodule. Two small protogastric spines. Rostrum 



