390 PROCEEDIXGS OF THE XATIOXAL ilUSEUM. tt>l 43. 



for the differentiation of the * Solaris" and *'Echinoptera Groups."" 

 Comatula and Comactinia. together with a few other similar genera. 

 are sharply distinguished from sU the other genera of the family 

 Comasterid^ by certain peculiarities of the cirri and of the genital 

 pinnules, and have therefore been grouped together into the sub- 

 family Comactimina?.* 



The genus "' ':Ua is very closely related to the genus Coma- 



ieUa. which ii : . . ? in the West Indian region. Both have a very 

 ctiriotis type of arm division, which is closely akin to that foimd in the 

 genera yemasier and ' r. and quite different from that of any 



other type. All of i: -v - w, in the structure of their cirri and 

 pinnules, a dose relationship to such of the 10-armed comasterids as 

 possess dorsal spines on the outer cirrus segments, and for that reason 

 have been united with them in the subfamily Capillasterinje.* No 

 sj)ecies at all closely related to XeocomatfUa alata is known which 

 possesses only 10 arms, nor is that species ever foimd in a 10-armed 

 condition. There are. however, many 10-armed species, especially 

 in the West Indies, belonging to the allied genera, but all of them are 

 sharply differentiated from the species of Comactinia by the presence 

 of dorsal spines on the outer cirrus segments, as well as by the much 

 longer and narrower segments of the genital pinnules. 



It is difficult to see how Carpenter could have supposed that 

 Comactinia (cJtinoptera. belonging to the subfamily ComactiniinsB. is 

 merelv a 10-armed form of SeocomatiTla alata, belonging to the sub- 

 family CapiUasterin*. 



Subiaimi:!- CO 3JLrVSXERr5d:. 

 COMASTER TYPICA Xovai . 

 [For the svacatjEij, S£e Vid. MedtL Xsnirb. For. K^baihaTn, 1906, p. 139.) 



1. Xorthof Port Waicott.WestemAustralia: 50 fathoms: GazeRe. — 

 One specimen. (See Zool. Anzeiger. vol. 34, Xo. 11. 12. p. 365.) 



2. Southwestern Australia. — Five specimens. (See Die Faima 

 Sudwest-Australiens. vol. 3. Lief. 13. p. 453.) 



COBCAITTHKSIA BSIASET7S CBdl). 

 [For t^ sTa uu>:z T. aee The CrintXiis of the Indian Oeesn.] 



1. Xorth of Port Walcott. Western Australia: 50 fathoms: Gazelle. — 

 One ^' (See Zool. Anzeiger. vol. 34, Xo. 11/12. p. 365.* 



2. -^ -tern Australia. — Two specimens. (See Die Fauna 

 Sudwest-Australiens, vol. 3. Lief. 13, p. 454.) 



COBCA^rXHI^A BEIXI ?. H. Cl|tflPr). 



[For is sraacvniT. arc Tlsc Reoait Criaoids <rf AtBtralia.) 



1. Mermaid, northwestern Australia; Gazelle; Cat. Xo. 2157. — Arm 

 fragments: the extravagant dorsal processes on the third, fourth, and 



> See Pne. BioL 3oe. WaafaiogtM!, toL S, p. 173. 



