93 



as long as broad on the fourth and on the eighth and following from three to four times as 

 long as broad, with the distal dorsal angles slightly produced. The distal pinnules are 8 mm. 

 long with 17 — 19 segments most of which are about three times as long as broad, smooth 

 and cylindrical, without produced or spinous distal ends. 



In life this individual was banded light lavender and light yellow, the bands being from 

 3 mm. to 4 mm. in width, thus resembling strongly P ectinometra jlavopurpurea \ the colour in 

 spirits is white. 



IV. Family Stephanometridae A. H. Clark. 



Genus Stephanometra A. H. Clark. 



Key to the Species of the Genus Stephanometra. 



a 1 Outer cirrus segments with long and prominent dorsal spines 



b 1 33 — 40 arms 110 mm. to 120 mm. long; 25 — 30 cirrus segments; first 

 six pinnules enlarged, stiffened and spine-like, gradually decreasing in 

 length beyond the second or third (India t o the M a 1 a y A r c h i- 



pelago and the Philippine Islands) echinus *) 



\y 16 — 24 arms 60 mm. to 70 mm. long; 20 cirrus segments; first three 

 to five pinnules stiffened and spine-like (Singapore to the Philip- 

 pine Islands and Xew Britain) tenuipinna 



a 2 Outer cirrus segments carinate dorsally, without dorsal spines 



b 1 Pj stiffened and spine-like, resembling P n but somewhat smaller ; 1 2 



arms 35 mm. long; 15 cirrus segments (Moluccas to Borneo). . spinipinna 

 \r Pj slender, flexible, delicate and flagellate, much smaller and weaker 

 than the enlarged and stiffened P 3 



c 1 P g the only pinnule which is enlarged and stiffened 



d 1 P 2 much enlarged and stiffened, usually more or less straight, 

 ending distally somewhat abruptly in a strong stout point; it 

 is composed of 11 — 15 (usually 12) segments, of which the 

 fourth-fifth are typically markedly the longest (A n d a m a n 

 Islands to Singapore, the Philip pi nes, the Malay 

 Archipelago, New Caledonia, Fiji, and the 



Tonga and Caroline Islands) monacantha ~) 



d" P 3 somewhat less enlarged and stiffened, usually more or less 

 strongly recurved, becoming very slender and delicate distally, 

 though not flagellate; it is composed of 15—20 segments of 

 which the fourth-fifth are not especially noticeable (M a d a- 



i] Synonym Stephanometra eoronata A. H. Clark. 



2) Synonyms Antedon fiavomaculata Bell and Himerometra aaita A. II. Clark. 



