162 BUKLETIN 129, UNITED STATES NATIONAL MUSEUM 



A row of five tubercles on first segment of female abdomen. 



Measurements. — Female, holotype, length of carapace to ends of 

 rostrum 10, length of rostrum 2.2, greatest width of carapace 8.2 mm. 



Range. — Peru; known only from the type-locality. 



Material examined. — North end of Ferrol Bay (Chimbote), Peru; 

 from rocks between tide lines; March 1; E,. E. Coker, collector; 

 received from the Peruvian Government; 1 ovigerous female, holo- 

 type (40462). 



Genus TALIEPUS A. Milne Edwards 



Taliepus A. Milne Edwards, Crust. R^g. Mex., 1878, p. 138 (subgenus 



of Epig^tus) part; type not specified. 

 Epialtus of authors (part). 



Type. — T. nuttallii (Randall). 



Carapace broadly oval, convex in all directions, smooth, armed 

 laterally with from two to four teeth, mostly small, and following 

 the outline of the carapace. Postocular and preocular tooth small 

 or absent. Rostrum inclined, sides convergent, tip bidentate. 

 Antennae hidden, or partly visible at sides of rostrum; basal article 

 subtriangular. 



Chelipeds strong; fingers with tips excavate or spoon-shaped, 

 gaping in the old male. Ambulatory legs stout, subcylindrical ; 

 dactyls strongly curved, two rows of spinules beneath. Large 

 species. 



Inhabits the west coast of America, from southern California 

 (Santa Barbara) to Patagonia. Rio de Janeiro (Bell) . 



KEY TO THE SPECIES OF THE GENUS TALIEPUS 



A'. Propodites of ambulatory legs without a tooth on lower surface. Two 

 small, thick, blunt, lateral teeth on either side of carapace. No preorbital 



tooth. A small postorbital tooth nuttallii, p. 162. 



A2. Propodites of ambulatory legs with a tooth on lower surface. A preorbital, 

 no postorbital tooth. 

 B'. Three lateral teeth on a strongly rimmed margin. Tooth of propodites 



small in adults, stronger in young marginatus, p. 164. 



B2. Four lateral teeth. Tooth of propodites strong in adults ..dentatus, p. 165. 



Species on both sides of the continent: marginatus. 



TALBEPUS NUTTALLH (Randall) 



Plates 50 and 51 



Libinia nuttallii Randall, Journ. Acad. Nat. Sci. Philadelphia, vol. 8, 1839 

 (1840), pi. 3. 



Epialtus nuttallii Randall, Journ. Acad. Nat. Sci. Philadelphia, vol. 8, 1839 

 (1840), p. 109 (type-locaUty, Upper California; types. Cat. No. 598, 

 Mus. Phila. Acad.). — Gibbes, Proc. Amer. Assoc. Adv. Sci., 3rd meeting, 

 1850, p. 173. — Stimpson, Journ. Boston Soc. Nat. Hist., vol. 6, 1857, 



