THE CANCROID CEABS OF AMERICA 537 



PILUMNOIDES HASSLERI A. Milne Edwards 



Plate 217, Figures 1 and 2 



Pilumnoides hassleri A. Milne Edwards, Crust. Reg. Mex., 1880, p. 304, pi. 54, 

 fig. 5-5d, (immature female) (type-locality, lat. 40° 22' S., long. 60° 35' W., 

 30 fathoms; cotypes in M.C.Z., cotypes in Paris Mus.); Bull. Mas. Comp. 

 Zool., vol. 8 ,Dec. 1880, p. 13. — A. Milne Edwards and Boxjvier, Mem. 

 Mus. Comp. Zool., vol. 47, 1923, p. 317. 



Pilumnoides perlatus Rathbtjn (not Poeppig), Proc. U. S. Nat. Mus., vol. 21, 

 1898, p. 586. 



Diagnosis. — Branchial ridge longitudinally oblique, almost parallel 

 to postero-lateral margin. Carapace granulate. 



Description.— Less strongly marked than P. perlatus. Carapace 

 longer and narrower, postero-lateral margins more convergent. 

 Surface of anterior two-thirds finely granulate; two hepatic nodules, 

 the outer one small. Antero-lateral margin definitely quinquedentate, 

 counting the angle of the orbit and a lobe immediately behind it; 

 the margin is prolonged on the branchial region in a line almost parallel 

 to the postero-lateral margin. The upper margin of the orbit some- 

 times but not always shows traces of emargination at the fissures; 

 outer fissure narrow, its borders not raised. Ornamentation of 

 chelipeds similar to that in perlatus but on the upper half of outer 

 surface of palm the tubercles are in large part clustered together, 

 forming larger unequal tubercles. The lobes on the upper margin 

 are more dentiform than in the allied form. The lobe on the outside 

 of the propodal finger is more projecting than in perlatus; the lower 

 margin of that finger is arcuate, not straight. Fingers light colored 

 in preserved specimens. 



Measurements. — Male (53446), length of carapace 11.7, width of 

 same 13.1 mm. 



Range. — From Uruguay to the Straits of Magellan. 



Material examined. — 



URUGUAY.— Lat. 35° 24' S., long. 53° 10' W.; 70-75 fathoms; 

 June 13-July 1, 1925; Undine, Capt. C. Alexandersson ; 7 males, 

 1 female, 5 young; lent by Buenos Aires Museum (15885). 



ARGENTINA.— Off the Rio de la Plata; January 13, 1888; 

 Albatross: Lat. 36° 42' S., long. 56° 23' W.; 11.5 fathoms; S. brk. 

 Sh. ; 3 young (21989). Lat. 36° 43' S., long. 56° 23' W. ; 10.5 fathoms; 

 S. brk. Sh.; 4 males, 3 females, 5 young (21990). Lat. 36° 47' S., 

 long. 56° 23' W.; 10.5 fathoms; S. brk. Sh.; 1 male, 4 females (21991). 



Mar del Plata: April 29, 1919; F. Felippone; 1 male (53446). 

 Martin Doello-Jurado collector; lent by Buenos Aires Museum: 

 25 fathoms, March 1918, 4 females (1 ovigerous), Cat. No. 9359; 

 from the market, August 7, 1918, 1 male, 3 females; 2 males, 7 females, 

 Cat. No. 10763; 2 males, 3 females, Cat. No. 9445. August 28, 1920, 



