20 BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



The outer maxillipeds do not fit close together nor against the epis- 

 tome. 



Chelipeds subequal, the chelae dissimilar. Merus with a spine or 

 tubercle near the distal end of the outer margin ; on the inner surface 

 near the distal end there is a transverse stridulating organ capable of 

 scraping against the granules of the pterygostomian region. Carpus 

 elongate, the right one with a sharp inner spine, the left one with a 

 small inner tubercle or spine. Right chela with palm expanded be- 

 low, both fingers narrow and gaping, more in the male than in the 

 female. Left chela shorter, very thin, and expanded below at the 

 middle of the propodus, immovable finger in consequence wider at 

 base than in the right chela, fingers not gaping; upper surface of 

 palm produced inward in a blunt tooth. 



b 



FIG. 4. BATHYPLAX TYPHLA, MALE (9720). a, OUTEE MAXII.UPEDS, SHOWING APPBOXI- 



MATION, X 4 J 6, ABDOMEN AND PABT OF STEKNOM, X 3 ; C, LEFT CHELA, X 2. 



Legs long and very slender, margins granulous, surface downy, last 

 three segments with a thin fringe of long hair. 



Measurements. Male (9724), length of carapace 16.5, width of 

 same 21.5 mm. 



Range. From Gulf of Mexico to Pernambuco, Brazil, 280 to 463 

 fathoms. 



Material examined. 



Southwest of Cape San Bias, Florida : Lat. 28 36' 15" N. ; long. 

 8G 50' 00" W.; 34T fathoms; gy. M.; temp. 44.1 F.; Mar. 13, 1885; 

 station 2395, Albatross; I male (9T24). Lat. 28 34' 00" N.; long. 

 86 48' 00" W. ; 335 fathoms ; gy. M. ; Mar. 13, 1885 ; station 2396, 

 Albatross; 1 male, 1 female (9729). Lat. 28 42' 00" N. ; long. 86 36' 

 00" W. ; 280 fathoms ; gy. M. ; Mar. 14, 1885 ; station 2397, Albatross; 

 1 female (9734). 



West of Cuba: Lat. 22 35' 00" N.; long. 84 23' 00" W.; 463 

 fathoms ; wh. Co. ; temp. 45 F. ; Jan. 21, 1885 ; station 2352, Alba- 

 tross; 1 female (9541). 



Localities recorded. 



Off Frederickstadt, St. Croix Island, 451 fathoms (A. M. E.). 



