Rai'I'OUTs i:t Procks-Vkuuaux Vor.. V 



Pl. XIII 



Pacht & Crone ad naturam phot. 



RIPE MALE EEL {Anguilla vulgaris) 



Fig. 1, seen from the ventral, Fig. 2, from the lateral. Fig. 3, from the dorsal aspect. 



