or by pseudosyzyg)^ ; if there are more than lo arms the IIBr 
series exactly resemble the IBr series and, as in the IBr series, 
the component elements are united by pseudosyzygy (instead of 
by synarthry as is always the case in the IIBr series of 2 in the 
Capillasterinae and Comasterinae) Comactiniinae 
a- No cirri 
b^ the IIBr series are 4 (3 + 4) and the following division series 
are 3 (2 + 3) ; the first brachial of the free arms bears a pinnule 
and there is a syzygy between the second and third; the arms 
are always more than 10 in number Capillasterinae 
b" the first pinnule is on the second brachial of the free arms 
c^ 10 or more arms; the ossicles of the IBr series are united 
by pseudosyzyg)' like the first two brachials ; the IIBr series, 
when present, exactly resemble the IBr series, and are always 
2 ; the presence of IIIBr series is very exceptional ; genital 
pinnules composed of relatively short and broad segments Comactiniinae 
■ c" always more than 10 arms; one or more IIIBr series always 
present; IIBr series mostly, or entirely, 4 (3 + 4); if 2, the 
component ossicles are united by synarthry ; IIIBr series 4 
(3 + 4), or 2, rarely 2 (i + -); genital pinnules composed 
of longer and more slender segments Comasterinae 
I**'- Subfamily Capillasterinae A. H. Clark. 
Key to the Genera of the Subfamily Capillasterinae. 
a^ More than 10 arms 
b' the first pinnule of the free arms is on the first brachial, and there 
is a syzygy between the second and third ; IIBr series 4 (3 + 4) 
and following series 3 (2 + 3) ; occasionally the division series are 
very irregular 
c* brachials much broader than long, oblong or wedge-shaped ; 
no covering plates along the brachial and pinnule ambulacra 
(southeastern Africa to the Malay Archipelago 
and northern Australia, and northward to south- 
ern J a p a n) , 
c" brachials triangular, about as long as broad, becoming elongate 
wedge-shaped distally ; brachial and pinnule ambulacra borde- 
red with large covering plates (Bermuda, Florida and 
the Caribbean Sea, and southward to Brazil) . 
Capillaster 
Nemaster 
