36 



corered by a lid or operculum. I have found it growing 

 profusely ou the bottom of a vessel which had been laying 

 in Fowey harbour for some months. This species was first 

 described by Dr. Johnston and figured by his lady, and in 

 honour of her is called " Catherina." 



** Stems composed of many parallel tubes. 



PHEASANT'S-TAIL CORALLINE. P. Myriophyllum. 

 " Clustered, the stems undivided, bellied at distant intervals, 

 pinnate; pinna? leaning to one side; cells shortly tubular, 

 seated in the axilla? of a curved spinous process, the aper- 

 ture wide and nearly even." PI. ix. 



Pheasanl's-tail Coralline, Ellis' Coral., p. 14, pi. 8, no. 10, 

 fig, a A. Aglaoph. myriophyllum, Lamorous's Cor. Flex., 

 p. 168. Sert. myriophyllum, Turton's L'n., vol. 4, p. 678. 

 Ellis and Solander's Zooph., p. 44. Stewart's Elem., vol. 2, 

 p. 443. Plum, myriophyllum, Fleming's Brit. An., p. 547. 

 Templeton in Mag. Nat. Hist , vol. 9, p. 466. Johnston's 

 Brit. Zooph., p. 148, pi. 19, figs. 4, 5. 



Hab. " On the back of the spider crab, and on a slab of 

 limestone." Goran, Mr. Peach. 



This beautiful coralline is of rare occurrence in our seas. 

 I have never procured a specimen myself, but Mr. Peach 

 has kindly favoured me with three from deep water off 

 Goran, one of which is remarkably fine, measuring six and 

 half inches in height; from these I have taken the following 

 description. The polypidom is stout, erect, and of a yel- 

 lowish horn colour. The trunk is stout, composed of many 

 sub-parallel tubes agglutinated together; marked on the back, 

 at intervals of from a quarter to one inch, with protuberances, 

 as if it was composed of internodes, which overlapped each 

 other at their extremities ; the overlapping parts are united 

 by transverse fibres, which do not appear to be parts of the 

 same tubes which compose the stem. In recent specimens 

 the tubes are not so apparent as in the dried state. "When 

 dried the stem is furrowed longitudinally, and in the furrows, 

 thickly marked with minute round orifices ; similar in ap- 

 pearance and perhaps in function, to the stomata of flowering 

 plants. The pinna? are conliued to the upper portions of the 

 stem, the lower, for one third or two thirds of its extent 

 being bare; they are divided at short intervals into joints, 

 are opposite, but from their frequently leaning all to one side, 

 they appear to be unilateral. The cells are deeply tubular 

 closely arranged one on each iuternode and attached to the 

 pinna? throughout their whole length ; they are unilateral 

 and placed on the inferior margins of the pinna? in the axillae 

 of a curved spine. The apertures of the cells are patulous 



