220 



ECHINODERMS OF THE BRITISH ISLES 



Mouth shields rounded triangular, with the apex directed out- 

 wards. Colour in life unknown. Diameter of disk 3 mm., arms 

 five times that length. 



Fig. 124. — Paramphiura punctata; part of oral and dorsal side. 

 (After Koehler, Notes echinologiques.) 



20. 



Only two specimens are known. The type specimen of Forbes 

 was found in the stomach of a cod, probably from the Dogger 

 Bank. The second specimen was found in the Channel (Giard). 



4. Amphipholis Ljungman. 



Differs from Amphiura in having two outer mouth papillae, 

 contiguous with the infradental papillae. The outermost papilla 

 is very broad, scale-like, and may, together with that of the 

 opposite side, cover the outer part of the mouth sht completely. 

 Radial shields usually contiguous. Arms usually rather short. 



Only one species known from the British seas, but at least 

 one more, A. Torelli Ljungman (known from Iceland and Green- 

 land, the littoral region), is very likely to occur there also, 

 especially in the northern parts of the British area. A third 

 species, A. instructa Koehler (a single specimen found at the 



