18 



SNAIL-TREFOIL CORALLINE. S. Rugosa. Ceils 

 ovate, wrinkled transversely, the mouth narrow, with 

 three or four small teeth on the rim. Ellis. 



Snail-trefoil Coralline, Ellis' Coral., p. 26, no. 23, pi. 15, 

 fig. a A. Sertularia Rugosa, Turton's Lin., vol. 4, p. 678> 

 Ellis and Solander's Zooph., p. 52, no. 24. Stewart's Elem., 

 vol. 2 f p. 442. Fleming's Brit. An., p. 542. Tern pie ton in 

 Mag. Nat. Hist., vol. 9, p. 4G6. Johnston's Brit. Zooph., p. 

 123, pi. 8, figs. 4, 5, and 6. Clytia rugosa, Lamouroux's 

 Cor. Flex., p. 204. 



Hab. On the roots of fuci, sponges, &c. ; Lantivet bay. 



This species is not common ; but when found it is gene- 

 rally in large companies, shooting up from the trailing tubu- 

 lar roots of each other. It rarely exceeds an inch in height, 

 is erect, and very sparingly branched. The cells are irre- 

 gularly arranged, sometimes being alternate, and at others 

 crowded together; it may, however, be immediately recog- 

 nised by its remarkably wrinkled eells. The vesicles very 

 closely resemble the cells, but are much larger and the 

 apertures are three-toothed. 



* * Cells in pairs, opposite, or semi-alternate. 



LILY OR POMEGRANATE FLOWERING CORAL- 

 LINE. S. Rosacea. Cells opposite, closely arranged, 

 mouth entire, plain, and truncated ; vesicles pear-shaped, 

 with a very uneven mouth. 



Lily or pomegranate flowering Coralline, Ellis' Cor., p. 

 8, no. 7, pi. 4, fig. a A. Dynamena Rosacea, Lamouroux's 

 Cor. Flex., p. 178. Fleming's Brit. An., p. 544. Sertularia 

 Rosacea, Ellis and Solander's Zooph., p. 39, no. 7. Turton's 

 Lin., vol, 4, p. 676. Stewart's Elem., vol. 2, p. 440. John- 

 ston's Brit. Zooph. ? p, 124, pi. ix., figs. 1 and 2. 



Hab. On Pinna Ingens, from deep water off the Deadmaa 

 point ; rather rare ; Gorran, Mr. Peach. 



From one to two inches high. The colour of this species is 

 of a delicate horn or pale brown. It is slender, drooping, and 

 rooted by numerous brown tubular fibres matted together. 

 It is sparingly branched in a bifarious manner. The pinnae 

 are alternate, and but slightly smaller than the trunk. The 

 trunk and pinnas are divided into joints at short intervals ; 

 and each interuode bears a pair of cells. The cells are 

 opposite; their superior portions free and very divergent; 

 their apertures slightly everted, even and unarmed, though 

 sometimes gently waved and the external portions slightly 

 pointed. The vesicles are sometimes abundant and arise from 

 the base of the upper row of cells ; they are p«ar shaped s 



