538 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



3 females, Cat. No. 11381. April 14, 1921, M. Lesieux collector, 

 2 males, 2 females (1 ovigerous), lent by Buenos Aires Museum. 

 February 1924, Leloir and Francheshi collectors, 1 male, lent by 

 Buenos Aires Museum (14292). 



Off Mar del Plata, 1914, Patria, lent by Buenos Aires Museum: 

 Station 76, 1 male, 9 females, Cat. No. 8620; station 81, 2 males, 



4 females (3 ovigerous). 



Off Punta Mogotes; about 25 meters; Patria; lent by Buenos Aires 

 Museum; Second voyage, station 75, 1 male, 2 females; second voyage, 

 stations 75 and 76, 4 males, 4 females; station 77, 11 males, 8 females, 

 1 young. 



Off Argentina; 1872; Hassler: E. of Creek Id.; lat. 40° 22' S., long. 

 60° 35' W.; 30 fathoms; March 3; station 27; 12 specimens, cotypes 

 (2979, M.C.Z.). Off Bermeja Head; lat. 41° 17' S., long. 63° 00' W.; 

 17 fathoms; March 4; station 28; 1 specimen (2978, M.C.Z.). 



Coast of Argentina; F. Felippone; 1 female (61123). 



PATAGONIA.— Point Madryn (probably); 2 young females; 

 lent by Buenos Aires Museum. 



CHILE.— Straits of Magellan; lat. 52° 22' 30" S., long. 69° 22' 00" 

 W.; 29.5 fathoms; S. St.; January 18, 1888; station 2775, Albatross; 

 1 male (21992). 



PILUMNOIDES NLDIFRONS (Stimpson) 



Plate 218, Figures 1 and 2 



Pilumnus nudifrons Stimpson, Bull. Mus. Comp. Zool., vol. 2, 1871, p. 143 (type- 

 locality, off Sombrero Key, 111 and 125 fathoms; types destroyed in the 

 Chicago fire). — A. Milne Edwards, Crust. R6g. Mex., 1880, p. 293, pi. 53, 

 figs, l-lgr. — A. Milne Edwards and Botjvier, Mem. Mus. Comp. Zool., 

 vol. 47, 1923, p. 320. 



Pilumnoides nudifrons Rathbun, Bull. Lab. Nat. Hist., State Univ. Iowa, vol. 4, 

 1898, p. 263. 



Diagnosis. — Carapace and chelipeds thickly hairy; a bare strip 

 across front and orbits. No large tubercle on outside of propodal 

 finger. 



Description. — Carapace more swollen than in the other species and 

 front more deflexed; surface densely clothed with a short vesicular 

 pubescence except for a naked band across the front and postorbital 

 region; some longer hairs on anterior portion. When the hairs are 

 removed the surface shows granulation on the highest parts of the 

 subregions, separated by broad smooth spaces. Frontal lobes less 

 oblique than in perlatus and hassleri. Slight emarginations in the 

 upper border of the orbit, separated by a shallow lobe; outer sinus 

 broad and shallow. Lateral teeth much as in hassleri but the last 

 three are erect. 



