K0.1766. STALK-EYED CRUSTACEA OF PERU RATHBUN. 557 



dactylus similarly ornamented, excepl for a row of tubercles next to 

 the prehensile teeth. Right cheliped wanting, as are also the left 

 ambulatory legs. Right ambulatories nearly smooth, long, hairy; 

 dactyli somewhat shorter than in D. sinistHpes. 



Length of carapace 18 mm., length of body about 70 mm. 



One specimen lacking the right cheliped, in shell of Thais chocolata 

 Duclos. 



Dredged, Bay of Sechura, about half-way between Bayovar and Matacaballa, 5 to 

 (i fathoms, April 10, 1907. 



Type.— Cat. No. 40470, U.S.N.M. 



? PAGURUS BENEDICTI (Bouvier). 

 Plate 48, fig. 1 . 



Eupagurus minutus Benedict, Proc. U. S. Nat. Mus., vol. 15, 1892, p. It (not 



Pagurus minutus Hess, 1887). 

 Eupagurus benedicti Bouvier, Bull. Mus. Hist. Nat., Paris, 1898, p. :>sj. 



A small, somewhat hairy, hermit crab with front nearly straight, 

 faintly three-lobed; eye stalks long, stout; scales short, rounded, 

 with a slender subterminal spine; acicle of antenna shorter than eye, 

 peduncle scarcely longer than eye. Chelipeds dissimilar, unequal, 

 right larger; its wrist triangular above, inner margin armed with 

 slender spines, a few scattered spines on the surface; chela suboval, 

 inner margin set with long slender spines; spines of outer margin 

 -mailer, two rows of spines beginning at carpus converge at base of 

 pollex, other scattered spines; wrist of smaller cheliped with two rows 

 of spines, upper face and oblique outer face of chela subequal, the 

 latter bordered by sharp spines. Ambulatory legs slender, longer 

 than chelipeds. 



Total length reaches 33 mm. The single Peruvian specimen is very 

 small, about 15 mm., and bears eggs. It is placed here with some 

 doubt. 



The ambulatories show broad bands of red and white, one of each 

 color on the propodus and the dactylus, the white distal to the red. 



Dredged near the northeast sideof San Lorenzo Island, depth 2\ fathoms, Februarys. 



Not previously known from Peru. 

 Distribution. — Gulf of California; Peru. 



CALLIANASSA UNCINATA Milne Edwards. 



Plate 45, fig. :'.. 



Callianassa uncinata Milne Edwards, Hist. Nat. Crust., vol. 2, 1 s:i7, p. 310, pi. 

 256ts, figs. l-:5. 



A burrowing shrimp with submembranaceous shell; carapace small, 

 oblong-oval, rostrum minute. Eye stalks Hat, triangular, with small 

 dorsal corneal. Inner antennae stout, peduncle as long as flagella; 



