735 



THE KECKNT CKIXOIDS OF AUSTRALIA— CLAKK. 6M 



b'-. Cirri XV-XX, 15; a median transverse ridge on the dorsal 

 side of each cirrus segment ) genital pinnules expanded (Nein 

 South Walea) 0. thetidis. 



Key to the Species of the Gencs Ptilometka. 



a^. Proximal cirrus segments as long as or longer than broad ; cirrus 

 sockets in more or less definite columns ; middle segments of 

 proximal pinnules half again to twice as long as broad ; distal 

 pinnules with the third and following segments longer than 

 broad (jr. and .9. AuMraUn] P. macronema. 



a^. Proximal cirrus segments twice as broad as long ; cirrus sockets 

 irregularly arranged ; middle segments of proximal pinnules not 

 so long as broad ; distal pinnules with the segments broader 

 than long until the distal third (S. E. Australia) P. mulleri. 



Key to the Austualiax Species of the Genus Tropiometka. 



a^. 30 or more cirrus segments ; arms perfectly smooth and evenly 

 rounded dorsally, usually about 200 mm. long ; deep violet or 

 hvight yeWow [Queensland] T. afra, 



a^. 25 or less cirrus segments ; arms with a narrow median dorsal 

 keel, 135 mm. or less in length; mottled violet and white, or 

 purple and yellow ((j>;tee;«s/a/i.i:i) T. encrinus. 



Key to the Australian Species of the Genus Compsometra. 



a?-. Cirri slender and delicate, the segments preceding the penulti- 

 mate being at least half again as long as broad C. loveni. 



a^- Cirri comparatively stoat, the three or four segments preceding 



the penultimate being broader thm long C. incoinmoda. 



The following Genera are represented in Australian Seas by a 



single Species each : — 

 Capillaster ; Craspedometra ; Stephanometra ; Cenometia ; Colobometra ; 

 Decametra ; Stiremttra. 



List of the Crinoids of Australia. 



In the annotated synonymy the localities printed in heavy 

 faced type are the type localities ; those in italics are the places 

 from vifhich the species are reported other than the place of origin 

 of the type-specimen. 



In cases where the first reference to a species is accompanied 

 merely by a more or less enigmatic "s|)ecihc formula," or is 

 merely a nomen niiduin, it is omitted, and the reference snbsti- 

 tuted where the species was first adequately described. Informa- 

 tion in regard to the early history of all the names may be found 

 in my paper on the "Noinenclaiure of the Recent Crinoids,"^ and 

 it seems superfluous to repeat the data there given. 



In the case of families and higher groups it has not seemed 

 worth while to ])urden the text with references to the original 

 place of publication, as in most cases tliese works are of no 

 interest other than purely systematic. Where such references 



iproc. U.S. Xat. jMuh., vol. 'M, Ko. 1(323, i i . 435-542. 

 R li 



