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BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



VOLUME 1 



d 



FIGURE 41. Tonrometra remota (P. H. Carpenter), syntypes: a, With spinous 'frill' 

 on proximal ossicles; b, with reduced ornamentation; c, apical cirrus of third row 

 from periphery; d, P a , tip lost. 



specimen. The peripheral cirri also have no distinct dorsal keel on the distal segments 

 unlike the apical cirri. 



The radials are short in the midline, with the distal margins concave. The division 

 series are much as in the types. The syzygies are more regular than in the types, the 

 first three being as usual 3+4, 9 + 10, and 14+15. 



The brachials between the first and second syzygies are oblong and slightly broader 

 than long; the following ones become a little longer than broad and tend to be wedge- 

 shaped. The edges of all the brachials are everted and produced into small spines. 



Pj is long and tapering, of 20 segments and 7 mm. long. The first four to six 

 segments are laterally compressed so that the dorsal edge is thin and crestlike. The 

 first segment is short, the second and third about as long as broad, the fourth longer 

 than broad. The following segments become progressively longer relative to their 

 width, the longest being about five times as long as broad. No P 2 is complete. They 

 were probably similar to PI. P 3 is the first genital pinnule. It has no ambulacral 

 furrow. The most complete one remaining has 9 segments about 4 mm. long. The 

 first four segments are stout and somewhat compressed, the third and fourth are slightly 

 longer than broad and the remaining segments are cylindrical and more elongated. The 

 gonad is fusiform and extends from the distal part of the fourth to the seventh segments. 



The anal cone is high. 



Localities.- Challenger station 147; between Marion Island and the Crozets, South- 

 ern Ocean (lat. 4616' S., long. 4827' E.); 2925 meters; temperature 1.22 C.; diatom 



