APPENDIX. 349 



amounts to sixteen, among which are found some 

 of very fine and unknown forms. Most of them 

 belong to the well-known species Cirrhatulus, Are- 

 nicola, Aceronereis, Nereis, Aphrodita, Serpula, Am- 

 phitritc. A Nereis was found swimming on the 

 surface of the water in the middle of the bay, 

 which measured two feet in length, and one inch in 

 thickness ; the appendages at its sides resemble 

 round leaves. An Aphrodite several inches long, 

 and very narrow, was not rare. An animal resem 

 bling the Amphitrite kind is found enveloped in a 

 transparent mass like jelly. 



Of Mollusca we observed, a Limacina; two Eoli- 

 dice, some of which have very beautiful colours ; 

 a Laniogenis; a Polycera; four kinds of Doris; a 

 Scylluea ; an animal which deserves the name of 

 Planaria, it was three inches long, two broad, and 

 only half a line thick ; on the upper surface, half 

 an inch from the edge, are two projecting eyes ; 

 and in the same part, on the surface beneath, the 

 mouth may be perceived ; in the middle of this 

 under surface is another aperture, from which the 

 animal, when in a tranquil state, frequently strethes 

 out four small folds of skin ; this creature, like the 

 Planarice, crawls very nimbly. Besides these, a small 

 Onichidium, and a new kind of shelled snail. 



In the mossy woods live a large, yellowish, 

 black-spotted Limax, and two Helices of middling 

 size. In the bay itself are found a few of the gilled 



