Dr. Johnston's Catalogue of Zoophytes. 



'21-7 



protruded from it vesicular-like lobes of a reddish colour, scored with fainter lines. When 

 fully expanded, the oral disk is not less than four inches across ; there is a smooth space 

 between the mouth and tentacula, which are very numerous, and placed in several rows 

 around the circumference ; those of the inner row are larger than the others, measuring 

 frequently two inches in length, and they become gradually smaller in the exterior series. 

 They are of a chesnut or reddish flesh colour, often darker-coloured towards the bases, but 

 never variegated with rings of different hues ; thick and clumsy, tapered to an obtuse 

 point, marked longitudinally with distinct lines or impressed striae, tubular, perforated at 

 the end, and constricted at their insertions ; the creature has no power of drawing them 

 within the oral aperture, as the greater number of Actiniae have, nor does it seem capable 

 of shortening them in any considerable degree, but it twists them in a wreathed or spiral 

 form, or gives the whole circle a greater or less degree of expansion. 



ACTINIA TUEDIA. 



The only British species of this genus to which the one before us has any relation, is the 

 Actinia sulcata, described and figured by Dr. Gjertner, in the 52d volume of the Philo- 

 sophical Transactions, p. 78, t. 1, f. 1. Both species correspond, or at least do not differ 

 materially, in colour and size ; and they are both equally incapable of retracting and con- 

 cealing their tentacula within the oral aperture; but they differ in the relative proportions 

 between these organs and the body, and in the sculpture of the latter, which in A. sulcata is 

 grooved in a longitudinal direction. 



The trivial name which I have bestowed on this species is intended to indicate the place 

 of its first discovery, Tuedia being, according to Sir Robert Sibbald, the ancient name 

 of the maritime parts of Berwickshire. It is not uncommon on this coast, but is found 

 only in deep water, whence it is dragged up by the fishermen. I have often found the ten- 

 tacula, in a separate state, adhering to their lines ; and as these retain their irritability and 



VOL. II. 3 F 



