ON A NORWEGIAN FIORD 



^ 



"a 



FIG. 2. One of the polyps of Rhabdopleura which is attached by its soft 

 contractile stalk (c) to the dark internal cord seen in Fig. I. A similar 

 polyp issues during life from the open end of each of the upright tubes 

 seen in Fig. i, and is, when disturbed, pulled back into the tube by the 

 contraction of the cord c. a, mouth ; b, vent ; c, contractile stalk ; 

 d, head-shield or disk ; e, the left gill-plane ; f, the body-mass enclosing 

 the intestine, etc. (From a drawing made by the author in Lervik, 

 Stordo, in 1882.) For a full account of Rhabdopleura, see the "Quart. 

 Journal of Microscopical Science," vol. xxiv., 1884. 



