\. II. (."huk. 



A. II. I . U.S. National Museum, \"!. | i, i . i, p. 64 1 Mast, rometra microp 



• the [ndian Ocean, 1912, p. 22y, fig. 42, p. 228 {Mastigometra microp, 



Euantedon A. II. ('huk. 



K' \ in the Species of the Genus Euantedon. 



.1 More than 20 cirrus segments; cirri XL, :: - 25, 15 mm. t < » 20 mm. long; 

 1' 7 5 mm. long with 10 -|- segments; 1' '> mm. long with 10 segments; 1' 

 4.^ mm. long with ii segments; arms 100 mm. long (Tahiti; littoral) . . tahitiensis 

 a Li »s than 20 1 g 17 cirrus segments 



ngest firrus segments about tour times as long as the median diameter; 



after the eighth the cirrus segments decrease in length so that the antc- 



nultimate is little, if any, longer than broad; the cirrus segments have a 



straight dorsal and ventral profile, and the ends are not swollen (Moluccas; 



7 Met r es) moluccana 



ng -i cirrus segments from two to two and one half times as long as broad; 

 the proximal and distal cirrus segments are subequal in length; both the 

 proximal and distal ends of the segments are thickened and prominent 

 (Pcoast of China; Plittoral) sinensis 



1. Euantedon tahitiensis nov. sp. 



The centrodorsal is very low, with a relatively large slightly convex dorsal pole 1.5 mm. 

 in diameter; the cirrus sockets are arranged in about three closely crowded more or less 

 irregular alternating rows. 



The cirri are XL. 22—25. '5 mm - to 2 ° mm - ' on g; tne m ' st segment is very short, 



the- second about twice as broad as long, the third about as long as broad, the fourth not 



twice a as the median diameter, the fïfth slightly longer, the sixth and seventh the 



:i two and two and one hall' time-, as long as the median diameter; the following 



very slowly decrease in length, the fourteenth or fifteenth and those succeedin^ being usually 



from one third to mie hall" again as long as the median diameter, though sometimes only 



slightly longer than broad: the segment preceding the antepenultimate and the antepenultimate 



longer again, aboul tuier- as Ion- as broad: on the segments as far as the eighth 



both thi ' and ventral profiles are equally concave, so that the articulations are prominent; 



i onward the dorsal profile becomes progressively more and more concave, and 



the ventral less and less, so that the segments beyond the twelfth or thirteenth have the 



ventral ■ approximately straight, and the dorsal very strongly and narrowly concave so 



that both ends of the segments <>n th<- d ipear very prominent; the opposing spine 



>mall, terminal <>r subterminal, directed ly forward; the terminal claw is slightly 



than the penultimate segment, moderately curved. 



.tal border of the radials projects slightly beyond the rim of the centrodorsal. 



