130 ] 
RECORDS OF W.A. MUSEUM. 
The twenty arms, which resemble those of related species, are 
from 85 mm. to 90 mm. long. 
Pi is 9 mm. long, composed of from twenty-five to thirty 
segments of which the first two are greatly enlarged and the 
remainder are slightly longer than broad ; P2 is 12 mm. long, with 
sixteen or seventeen segments which after the third become much 
elongated, those in the outer part of the pinnule having produced 
distal edges bearing prominent spines at the prismatic angles ; the 
pinnule is stiff and spine-like ; P3 is from 15 mm. to 17 mm. long 
with from sixteen to eighteen segments, resembling P2 but pro- 
portionately larger ; P4 is 17 mm. long with eighteen segments, 
similar to P3 ; P5 is 12 mm. long with fifteen segments, similar to 
the preceding ; P6 is 10 mm. long with fourteen segments ; the 
distal pinnules are about 11 mm. long. 
The colour in life is white with yellow bands on the arms and 
pinnules, more rarely on the cirri. 
The specimens other than the type. Three, all with twenty arms, 
and all resembling the type. 
Comparison with related species. The species of the genus 
Neometra at present known are seven in number ; they may be 
briefly diagnosed as follows: — 
Neometra alecto ; Fifteen to twenty arms, 60 mm. to 70 mm. 
long; cirri IX-XV, 39-46, 25 mm. to 30 mm. long (Philippine 
Islands ; 42-58 fathoms). 
Neometra multicolor ] Twenty arms, 60 mm. long, cirri XV, 35, 
20 mm. long (southern Japan ; 20-110 fathoms). 
Neometra conaminis', Twenty arms, 85 mm. to 90 mm. long; 
cirri XIV-XIX, 40-45, 25 mm. long (southwestern Australia; 
80-120 fathoms). 
N eometra spinosissima \ Twenty arms, 130 mm. long; cirri XI, 
42-55, 25 long (Andaman Islands). 
Neometra acanthaster ; Thirty arms, 60 mm. long ; cirri 20 mm. 
long, ventrally carinate (Philippine Islands ; 49 fathoms). 
Neometra sihogae ; Thirty to forty arms, 70 mm. to 75 mm. long ; 
cirri XV, 31-36, 25 mm. long; edges of all the ossicles produced ; 
terminal cirrus segments with triple dorsal processes (Solor Strait, 
east of Flores ; 1 13 metres). 
