3. Euantedon sinensis A. H. Clark. 



A. H. Clark. Smithsonian MisceIlan«ous Collections, vol. 60, 1912, N° 10, p. 31 {Euantedon 

 sinensis). 



Antedon de Fréminville. 



Key to the Species of the Genus Antedon. 



1 8 or more cirrus segments, a'.l of vvhich are long, the distal differing but 

 slightly from the proximal: the distal portion of the cirri is not compressed 

 laterally so that the cirri appear of the came diameter throughout; no 

 perisomic interradials in the angles of the calyx; arms slender and very long, 

 the proximal triangular brachials being considerably longer than broad v Vèr x 

 long, not more than three times as broad as long, regularly oblong or 

 slightly trapezoidal, the lateral edges making usually a straight line, more 

 rarely a broadly obtuse angle, with those of the IBr 2 (axillary) 

 b 1 usually 18 — 20 cirrus segments (from Malaga northe as t wa rd along 



the coasts of Spain and F ra nee to Italy, the nee southward 



to Sicily; Aegean Sea) mediterranen, 



\y usually 24 — 28 cirrus segments (Adriatic Sea) adriatica 



1 7 or fevver cirrus segments (more than 1 5 only in exceptional cases) of which 

 the proximal are long, but the distal, which are more or less compressed 

 laterally, are shorter, usually about as long dorsally as broad, and broader, 

 usually twice as broad, in lateral view ; interprimibrachial plates usually 

 prominently developed in the angles of the calyx ; arms comparatively short 

 and stout, the proximal triangular brachials being usually noticeably broader 

 than long, never longer than broad; IBi^ short, the length rarely so much 

 as one third of the width, much narrower distall)' than proximallv, so that 

 the lateral angles of the axillaries project beyond the distal angles of the IBr 1 

 b 1 cirri increasing in lateral diameter very gradually, the distal portion being 



not greatly different from the proximal ; shortest outer cirrus segments 



measuring along their dorsal profile one third to one half more than their 



lateral diameter 



c 1 Pj with more than 25 segments (coasts of Ireland, southern 

 Scotland and England [except the North Sea], the Channel 

 Islands, and southward to Cezimbra, Portugal). . . . bifida 



c 2 Pj with less than 20 segments (G u 1 f of Guinea, from Wapoo, 

 Ivory Coast, eastward to II ha das Rolas, off the southern 



coast of Sao Thomé) ' luipferi 



b 3 outer cirrus segments strongly compressed laterally, so that the cirri are 



in lateral view nearly or quite twice as broad distally as proximallv ; 



longer proximal segments half again to twice as long as the median 



diameter; shorter distal segments as long dorsallv as broad proximallv 



