302 PLUMULARIID^. 



surpassed in beauty) with which she enriched her husband's 

 classical work. 



Hob. On shells, corallines, and especially the tests of 

 Ascidiaus, from deep water ; generally distributed. Abun- 

 dant and very fine in Shetland : Cornwall, plentiful ; I 

 have specimens overspreading the shells of Pinna from 

 60 fathoms : Arran Islands, west coast of Ireland (Barlee) : 

 Jersey (A. M. N.) : Peterhead and Wick, on the fisher- 

 men's lines (C. W. P.): Oban (T. H.): off Sana Island, in 

 40 fathoms (Hyndmau) : coasts of Yorkshire, Durham, 

 and Northumberland; Dublin Bay; Isle of Man (T. H.), 

 &c. &c. 



The stemless variety I have dredged off Ilfracombe, and 

 found growing on Sertularella Gayi, from Cornwall : 

 Peterhead (C. W. P.). 



4. P. ECHINULATA, Lamarck. 



PLUMULARIA ECHINULATA, Lamk. An. s. V. (2nd ed.) 1G2; Johnst. B. Z. 464, 



465, fig. 80. 

 SERTULARIA SETACEA, Lister, Phil. Trans, 1834, 371, pi. viii. fig. 4. 



Plate LXV. fig. 2. 



SHOOTS very delicate ; STEM curved, jointed, the inter- 

 nodes rather short and attenuated downwards, simply 

 pinnate ; pinnae alternate, arching gracefully, one on 

 each internode, with two joints immediately above the 

 point of origin; HYDROTHEC^E small and basin-shaped, 

 moderately distant, separated by a single joint ; NEMA- 

 TOPHORES very minute, cup-shaped, simple, adnate to 

 the side of the stem, one behind and above the calycle, 

 one below it, and one (or sometimes two] in the axils of 

 the pinna ; GONOTHEC^E ovate, subsessile, with longitu- 

 dinal spinous ribs, borne profusely on the creeping sto- 

 lon and the central stem. 



P. ECHINULATA is commonly from | to 1 inch in height. 



