244 



anchor-plates are as the anchors of varying size and shape. The 

 small plates have, in both ends of body, seven large holes in the 

 anterior end, and no bridge or other distinct articulation for the 

 anchors. The large plates are elongate and rather like the 

 anchor-plates in Synapta. In the anterior end of the plates there 

 are always more than seven large toothed holes (usually 13 — 16) 

 and the articulation with the anchors is well developed and rather 

 like that of the plates in Protankyra, a well defined bridge being 

 wanting. The ciliated funnels in acanthia are of two different sizes 

 and shapes, but as the funnels in multipora Clark are not known, 

 it is only possible to say that the funnels in this genus may be 

 rather large and of varying shape. 



Eupatinapta is in several characters very like Leptosynapta, but the 

 presence of large anchor-plates with many holes separates it distinctly 

 from that genus. For the present we do not know more than two 

 species belonging to this genus: Synapta acanthia Clark and Lepto- 

 synapta multipora Clark. Both these species are from the Atlantic 

 coast of America. 



Eupatinapta acanthia (Clark). 



Synapta acanthia. Clark. 1899. Notes on the Echinoderms of Bermuda, 

 pag. 126. Pl. IV. 



Leptosynapta acanthia. Clark. 1908. The Apodous Holothurians. pag. 92. 

 Pl. V fig. 1 — 13 & 22. 



Clark. 1924. The Synaptinae. pag. 477. PI. 6 

 fig. 12—16. 



Bermuda. 14. VII. 1926. Sandy shore at low water. 40 specimens. 



The specimens at hand measure up to 14 cm in length. They 

 are yellowish-white with brown warts, which are densest on the 

 anterior end of body. There are 12 tentacles, each with 7 — 8 pairs 

 of digits and on their oral side there are 4 — 20 dark brown sensory 

 cups. The calcareous ring (Fig. 44. 11) is distinctly different from 

 Clark's figures as all the pieces have a low projection on the an- 

 terior margin. Muscular impressions are distinct and the radial 

 pieces are perforated for the nerves. There are three polian ve- 

 sicles and a single unbranched stone-canal. The alimentary canal 

 has no loop. It consists in all the specimens dissected of three 

 parts. Oesophagus is long and thin and distinctly different from 

 the long and folded, stomach-shaped intestine (Fig. 43). The third 



