Crinoidea. 447 



Thalassometridae. 



Ptilometra macronema (see beyond, p. 461). 



Antedonidae. 



Antedoninae. 

 Compsometra incommode (see beyond, p. 464). 



Annotated List of Species. 



Subordo Oligophreata A. H. Clark. 



Fam, Comasteridae A. H. Clark. 



Subfam. Comactiniinae A. H. Clark. 



I 



Genus Comatulella A. H. Clark. 

 Comatnlella brachiolata (Lamarck). 



Literature: See "The recent Crinoids of Australia". 



Localities: Stat. 56; Koombana Bay, 6 --7 miles southwest 

 of Bunbury; 14 l /tl8 meters; rocky bottom, with a few plant like or- 

 ganisms; 28. VII. (3 specimens). ? Vicinity of Perth (1 specimen). 



Further Distribution. The only definite locality previously known 

 for this species is Port Phillip, near Melbourne, Victoria; the 

 specimen from Port Phillip, which I have recently recorded, is in the 

 British Museum. 



Notes. The largest specimen from Koombana Bay has an arm 

 length of 45 mm; the arms are short, very rugged and very stout, in- 

 creasing gradually in breadth to about the twelfth brachial, thence tapering 

 rapidly to the tip. All the arms and almost all the pinnules possess am- 

 bulacral grooves. The centrodorsal is large, thick-discoidal, with a broad 

 flat dorsal pole 4,5 mm in diameter. The cirri are XIV, 32 35, 13 mm 

 long; they are placed in a single slightly irregular marginal row. The 

 cirri taper gradually to about the eighth segment, being comparatively 

 slender from that point onward. The pinnules in this specimen resemble 

 the arms in being short; they are stout at the base, but taper rapidly in 

 the first four segments, being comparatively slender from that point outward. 

 The distal pinnules are slender, but short. The other two specimens are 

 similar. 



The specimen probably from Perth is larger than those from Koombana 

 Bay; the anterior arms measure 65 mm in length and the posterior 60 mm. 



