is8 



Parametra A. II. Clark. 



Kej i" th< Species ol the Genus Parametra. 



.1 Arms evenl) rounded dorsally, the brachials, including the distal, entirely without 

 a median elevation or carination, and with only very slightly produced edg( 

 elements of the division series verj strongly convex dorsally, entirely without 

 swollen or everted borders, their centres occupied by a very broad, low and 

 obscure median swelling Hawaiian Islands; 345 634 Metres) .... fisheri 

 .1 Brachials always with the mid-dorsal portion abruptly raised, forming a more or 

 less evident carinate pro of the ossicles of the division series, which 



are only slightly convex dorsally, more or less raised or everted; a more or 

 less developed notch is present between the outer portion ofte proximal borders 

 of the axillaries . I brachials and the preceding ossibles, these notches, 



when the arms are in apposition, forming pon-s through which water reaches 

 the sides of the disk 



b' the ossicles of the division series and the earlier brachials have strongly everted 

 *es; the distal. or both, clements of the division series and the first brachial 

 pair have a rounded and inconspicuous carinate process; the cirri have about 

 20 segments (Kei and Lesser Sunda Islands; 216 — 252 Metres) . . compr, 

 1. the "ssicles of the division series and the earlier brachials have moderately 

 everted distal edges; the ossicles of the division series and the first two 

 brachials are either smootli dorsally. or bear rounded and inconspicious carinate 

 processes; more than 20 cirrus segments 



c l from 10 to iS (but very rarely more than [5) arms; ossicles of the division 

 series usually entirely without median carination; sides of the division series 

 usually quite smooth, buth the lateral borders of the ossicles of the IBr 

 series may be crenulate, or mire or less tubercular (Hong Kong and 



1 ormosa to southern Japan; 128 306 Metres) orion 



from [6 to 20 (usually from 17 to 20) arms; ossicles of the division series 

 usually with a low and narrow median carination; sides of the division 

 series usually with a more or less developed tubercular ornamentation 



lilippine Islands; [48—502 Metres) granulata 



1. Parametra fisheri (A. II. Clark). 



.\. II. Clark. Proc. U.S. National Museum, vol. 34, [908, p. 223 [Thalassometra Jislt. 



2. Parametra compressa I'. 11. Carpenter). 



P. II. Carpenter. "Challenger" Reports. Comatulae, [888, p. 222, pi. 41, [Antedon com- 

 pressa, part). 

 .\. II. Clark. Smithsonian Miscellaneous Collections, vol. 61, [913, X" 15. p. 45 {Parametra 



