72 BULLETIN 91, UNITED STATES NATIONAL MUSEUM. 



Chelipeds equal, rounded, smooth, and glabrous; chelae small, com- 

 pressed, lower margin sinuous, upper margin of manus a little con- 

 vex; fingers shorter than palm, fitting together, dactylus somewhat 

 curved and armed near base with a small tooth which fits a slight 

 excavation in propodal finger. 



Legs short, subcylindrical and smooth; first leg shorter and nar- 

 rower than second; both have the dactyli short, curved, and closing 

 against the expanded end of propodus which is clothed at that 

 point with a little tuft of short, stiff hair; third leg about as long 

 as second, dactylus short and curved, but distal end of propodus not 

 expanded; last leg shorter than third, and slenderer than the rest, 

 dactylus slightly curved and very long and slender, equal in length to 

 propodus. 



Abdomen very wide, exceeding sternum. 



Measurements. — Female (40448), length of carapace 5.7, width of 

 same 8 mm. 



Habitat. — In shells of mollusks: probably Mytilus algosus Gould 

 (Smith), Calyptraea, si^ecies (Lenz), Crepidula dilatata (Coker). 



Range. — Peru; Chile. 



Material examined. — 



Ancon Bay, Peru; found with Crepidula dilatata Lamarck on 

 mussels; R. E. Coker, coll.; received from Peruvian Government; 

 1 female ovig. (40448). 



Talcahuano, Chile ; Hassler Exped. ; received from" Mus. Comp. 

 Zool.; 1 female (22848). 



PINNOTHERES ANGELICUS Lockington. 



Plate 16, figs. 5 and 6. 



PinnofJieres angelica Lockington, Proc. California Acad. Sci., vol. 7, Dec. 1, 

 1876 (1877), p. ir» [10] (type-locality, Angeles Bay, Gulf of Cali- 

 fornia, in oysters; tyiies not extant). Not P. angelicus Miers, Journ. 

 Linn. Soc. London, Zool., vol. 15, 1880, p. 86. 

 Diagnosis. — Female transverse, smooth, shining. Dactylus of sec- 

 ond leg mucli the longest. Prominent tubercle on basal joint of an- 

 tennae. Dactylus of endo- 

 gnath attached to end of 

 propodus. 



Description of female. — - 

 Smooth, shining. Cara- 

 pace thin, easily wrinkled, 

 transverse, with anterior 



Fig. 34. — Pinnotheres angelicus, odteu maxil- niaro'in stron<^lv arCUate 



LU-ED OF FEMALE (17467), X 15^. *= . ^ . , * 



posterior margin long, 

 slightly concave, sides rounded; gastric region well defined; a large 

 pit on branchial region near inner angle. Front advanced, edge 



