'43 
This appears undoubtedly to be an undeveloped specimen of yl. /otitic irra , the cirri are 
more slender than in the type, and are composed of relatively longer segments, and the ornament- 
ation of the elements of the I Br series and first two brachials is scarcely more than indicated. 
Pterometra A. H. Clark. 
Key to the Species of the Genus Pterometra. 
a' No ventral spines on the longer proximal cirrus segments: cirri numerous, 
XXX — XXXV, composed of 80 — 122 segments; 20 arms; no trace of carination 
on the division series 
b' cirri excessively long and stout, from one fourth to one third again as 
long as the arms (100 mm. to 118 mm. long), composed of 109 — 122 
segments ; all ten columns of cirrus sockets closely crowded against each 
other; arms 90 mm. long (P h i 1 i ppin e I si a n d s) •. ma^ni^eda 
b'- cirri shorter and more slender, from three fourths to four fifths of the 
arm length (75 mm. to 80 mm. long), composed of 80 — 85 segments; 
columns of cirrus sockets separated interradially by a broad shallow 
groove, radially by a narrow flat bare area; arms 100 mm. long (Gulf 
- of M a r t a b a n to D a m a r Island and the Philippines) . piilcherrima 
a- Longer proximal cirrus segments bearing on the midventral portion of the 
distal edge long sharp spines which e.xtend over the bases of the succeeding 
segments; cirri XX — XXX (usually XX — XXV' ), composed of 70— i 1 3 segments; 
20 — 30 (typically about 30) arms 
b' proximal portion of the animal very broad, the division series and arms 
as far as the seventh brachial (at least) as seen in lateral view diverging 
rapidly, at an angle of approximately 90°; colour, in alcohol, uniform brown 
c^ cirri shorter, more numerous, and more slender, XXX, 86, 50 mm. 
long; arms 80 mm. long (Philippine Islands) splendida 
c- cirri longer, less numerous, and stouter, XX — XXV, 99 — 113. 
77 mm. long (n o r I h e r n C el ebes) venusta 
b- proximal portion of the animal very narrow, the division series and arm 
bases as seen in lateral view diverging very slowly, at an angle of about 
45°; colour in alcohol violet, blotched and variegated with white; 20 — 30 
arms (Phil i p p i n e I si a n ds) trichopoda 
I. Pterometra venitsta A. H. Clark. 
A. H. Cl.\uk. Zool. Anzeiger, vol. 39, 1912, N« 1112, p. 424- 
Stat. 117. Entrance to Kwandang Bay, Celebes. 80 Metres. 4 Ex. 
The centrodorsal is thick discoidal or columnar, the sides nearly parallel. 6 mm. broad 
