Poe eo, i 
AGH 
CS al A 
CRINOIDEA. 
By Austin H. Ciark, United States National Museum. 
I—INTRODUCTION. 
In spite of all the work that has been done upon the Crinoidea of the Antarctic 
region, unexpected new forms still appear in every extensive collection from that area. 
Because of their dependence upon a definite and narrowly delimited range of 
conditions, the Crinoidea are very locally distributed in all seas, and although they may 
be exceedingly abundant in a given region they will not be found unless one happens 
to hit upon one of the often very circumscribed areas in which they occur. 
So we may expect that for some time to come new crinoid types will continue 
to be found in the Antarctic seas, especially in the deeper waters. 
Il.-THE ANTARCTIC CRINOID FAUNA. 
The following crinoids are found in the Antarctic faunal area—that is, along 
the shores of the Antarctic continent and about Kerguelen, Heard Island and the South 
Orkneys—in water of less than 600 fathoms in depth. 
OrpeR COMATULIDA. 
Sub-order MACROPHREATA. 
Family ANTEDONIDAE. 
Sub-family ZENOMETRINAE. 
Eumorphometra concinna A. H. Clark. 
Sub-family HELIOMETRINAE. 
Promachocrinus kerguelensis P. H. Carpenter. 
Solanometra antarctica (P. H. Carpenter). 
Florometra mawsoni, sp. nov. 
Anthometra adriani (Bell). 
Sub-family BATHYMETRINAE. 
Tsometra vivipara Mortensen. 
Thaumatometra nutrix Mortensen. 
