MISCELLANEOUS. 85 



The peduncle has a degree of flexibility, enabling the animal to turn 

 the whole a little to one side or other. But how much has not yet been 

 ascertained. As yet it ha.s not exceeded the fifth part of a circle. 



Generally, on the approach of light, the hood closes up. At first it 

 did so even on the shade of the hand passing its glass. 



The pale colour of the hood is diversified on either side by a dark 

 brown stripe, arranged in two trapezoidal figures, and others of imperfect 

 formation. 



This animal is exceedingly rare. 



This specimen is rooted on a Tubularia indivisa, near the bottom of 

 the stalk. The Tahidaria, to judge of the size and quality of numerous 

 parasites, must be of considerable age, that is, at least several years. It 

 has a fine flourishing head or coronal. Several minute Sertularia; grow 

 on the hood itself. 



The feelers are cylindrical, consisting of several articulations of nine 

 or ten divisions, projecting without the hood, and perhaps several within 

 it. The whole are beset with .slender spines ; the longest are round the 

 articulations. The extremity of the feeler is environed by about five 

 spines, advancing considerably beyond it. 



Plate XIX. 



Fig. ] . Lepas Cyproea (Scaphellura vulgare ?) 



2. Feelers. 



3. Single Feeler. 



4. Balanus. 



Serpula contorta. — Plate XX., Fig.s. 1, 2, 3, 4, 5, 6. 



On the rocks east of Portobello, in the Firth of Forth, this animal is 

 in uncommon profusion. These rocks are almost entirely destitute of all 

 vegetation, nor is there any appearance of it on the shore. But, not far 

 distant, are other rock.s, on which are marine plants. The shells of 

 these animals are conglomerated and arranged more irregularly on the 

 surface of the lower part of the rocks, which are not dry probably before 

 about half tide. 



