PART 5 



A MONOGRAPH OF THE EXISTING CRINOIDS 



337 



Except in some of the larger specimens of arm length about 100 mm. and rarely 

 in smaller ones, the proximal brachials either have the middle portion of the distal edge 

 greatly produced into a thin rounded triangular deeply serrate finlike process at right 

 angles to the axis of the arm, or there may be on the dorsal surface an abruptly elevated 

 triangular area thickly studded with minute spines with the base occupying about the 

 middle half of the distal edge and the more or less rounded apex on, or very near, the 

 proximal edge. In a lateral view of the arms these elevated spinous areas appear as 

 high rounded processes which are about their own width apart; but they may become 

 much narrowed and restricted to the distal half or less of the brachials, in which case 

 they appear as short and broadly rounded carinate processes. 



TABLE 9. Details of some specimens of Florometra mawsoni in the British Museum 



(all measurements in mm.) 



Localities. Aurora (Australasian Antarctic Expedition) station 2; Adelie Land 

 (lat. 6655' S., long. 14521' E.) ; 581 meters; bottom temperature 1.8 C.; bottom, 

 ooze; December 28, 1913 [A. H. Clark, 1937] (1, Australian M.; 1, U.S.N.M., E. 3052). 

 Type locality. 



Aurora station 12; Queen Mary Land (lat. 6432' S., long. 9720' E.); 201 meters; 

 bottom, rock; January 31, 1914 [A. H. Clark, 1937; John, 1939] (11, U.S.N.M., E. 3054, 

 E. 3056; 2, Australian M.) 



Aurora station 10; Queen Mary Land (lat. 6506' S., long. 9613' E.); 594 meters; 

 bottom temperature 1.65 C.; bottom, ooze; January 29, 1914 [A. H. Clark, 1937] 

 (4, Australian M.). 



Aurora station 9; Queen Mary Land (lat. 6520' S., long. 9527' E.); 439 meters; 

 bottom temperature +1.38 C.; bottom, granitic pebbles, with a small amount of ooze; 

 January 28, 1914 [A. H. Clark, 1937] (2, U.S.N.M., E. 3053). 



Aurora station 8; Queen Mary Land (lat. 6608' S., long. 9417' E.); 219 meters; 

 bottom, small granitic rocks, no ooze; January 27, 1914 [A. H. Clark, 1937] (6, U.S.N.M., 

 E. 3055). 



Aurora; no data [A. H. Clark, 1937] (2, U.S.N.M.). 



Gauss (German Southpolar Expedition); vicinity of Gaussberg; 400 meters; bottom 

 temperature 1.85 C.; February 15, 1903 [A. H. Clark, 1915] (1, Berl. Mus.). 



