'71 



io or 11 enk exceptionally more than 10) arms; 



lll'.r series, if present, 2 



i' large; proximal portion of anima] very broad and 

 well rounded, the profile of the division series and 

 arm bases strongly convex; ossicles of the division 

 series and arm bases with the lateral borders strongly, 

 the proximal and distal less strongly, everted, un- 

 modified, finely tubercular, or crenulate, and with 

 a narrow blunt median keel; brachials usually each 

 with a prominent, though low, small rounded median 

 tubercle which beyond the middle of the arm gradu- 

 ally becomes obsolete; cirrus segments slightly 

 constricted centrally, with prominent ends; stout with 



10 (exceptionally 11) arms 160 mm. to 1S0 mm. 

 Ion-; cirri about XXX, 15 — 21 (usually 16 — 19) 

 (Hawaiian Islands; 574— Si 2 Metres) . . . 



i small: proximal portion of animal narrow, the profile 

 of the division series and arm bases diverging, in 

 approximately a straight line, at a relatively small 

 aiKde with the dorsoventral axis; dorsal surface of 

 the division series and tïrst four brachials rising 

 evenly, and rather steeply into a low and very 

 blunt median keel, which becomes obsolete in the 

 outer half of the arms; cirrus segments with un- 

 moditïed proximal and distal borders; slender, with 



11 arms <>; mm. long; cirri XV, 16, 20 mm. long 

 (sou t h west e r n Ja pa n ; 171 Metres) 



Calyptometra 



Chlorometra 



Crossometra A. II. Clark. 

 Key to the Species of the Genus Crossometra. 



imal portion of the animal appearing narrow, the profile of the division 

 series in lateral view nearlj straight, making an angle of about 45 with 

 the dorsoventral axis. or an angle of about 90 with each other; 29- -32 

 arms [50 mm. long; cirri XXV XL, 23 2'», 30 mm. to 40 mm. long 

 (Timor to the Malay Archipelago and the Philippine Islands; 



54 _ :; ,, Metres) investigatoris 



imal portion of the animal very broad and well rounded 

 listal cirrus segments about as Ion- ,,s their distal diameter, with the 

 mid-dorsal line sharpened, bul nol produced; division series evenly 

 rounded dorsally, with no tracé of tubercles on the individual ossicles 

 Mol ucc as; 310 Metres) helius 



