ANGUINARIA. 287 



elastic to admit the foot. Dr. Johnston states, on my au- 

 thority, that it is frequent on the coast of Ayrshire. I must 

 have made some mistake in giving this information, for it 

 is rather rare. It abounds, however, on specimens of Ry- 

 tiphlma jjinastroides, sent to me from Hastings by Mr. 

 Tumanowicz; also, on the same alga, received from Miss 

 S. Beever and Mrs. Gatty. 



Genus IX. AA^GUINAEIA, Lamarck. 



Ge7i. Char. Polype-cells spathulate, erect, scattered, with a 

 lateral aperture near the apex, originating from a creeping, fis- 

 tular, sub-calcareous fibre, adnate to a foreign base. Polypes 

 Ascidian . — Johnston. 



I. Anguinaria spathulata, Ellis. (Plate XVI. fig. 56.) 

 Hab. Coast of Ireland, W. Thompson; coast of York- 

 shire, Mrs. Gatty ; Salcombe, Eev. T. Hincks ; coast of Ayr- 

 shire, D. L. 



This has been called Snake Coralline, from its shape, or 

 because, like a snake, it creeps in a winding way along the 

 stems of such seaweeds as Dast/a coccinea or Rytiphlaea 

 jnnastroides. " From very small holes, in the broadest part 

 of the irregular winding tube, there arise here and there 

 small, testaceous, white, hollow figures, exactly resembling 



