30 ECHINODERMS OF THE BRITISH ISLES 



Bathymotrical (listril)utioii ca. 5-200 m. ; exceptionally recorded 

 also from 450 m. W. of Ireland.^ 





Fig. 16. — A Pentacrinoid, nearly fully formed, but still without cirri or 

 pinnulao. Note the large oral plates. (After Chadwick.) x ca. 14. 



2. Antedon i^etasus (Diiben and Koren). 



Cirri usually ca. l., with 11-17, more generally 15, segments ; 

 they very much resemble those of A. bifida (Fig. 122; compare 



^ The records in older literature are scarcely reliable, since a confusion 

 of the two species bifida and ^jetosw.s is likely to have taken place. The 

 Anledon " rosaceus'" from the Rockall Bank probably is either bifida or 

 petasus. 



