464 SUPPLEMENT. 



out. It was unattached by any stalk, and was fixed to some sea- 

 weed. The lower part, which looks like a stalk, was soft, and it did 

 not adhere to the sea-weed by its apex. The upper part of the 

 stalk, immediately below the head, was marked by longitudinal 

 lines ; the lower part was dotted over with little spots. The ten- 

 tacula were arranged in two rows ; ten in the lower row, with an 

 equal number of short club-shaped ovarian ? tubercles at their bases. 

 The part above the inferior tentacula was constantly changing its 

 form, and the currents described by Mr. Lister in Tubularia indivisa 

 were very distinctly seen ; the circulation or motion of the contained 

 water was not observed in the stalk-looking portion." Prof. John 

 Reid. 



Family SERTULARIAD^E. 

 ANTENNULARIA RAMOSA, p. 88. 



On A. ramosa there are two trumpet-like processes placed, in re- 

 gard to the cells, similarly to those of Plumularia Catherina, as de- 

 scribed in a subsequent note. These processes are the analogues to 

 the birdsheads and beaks upon the Cellularise and Lepralise. F. W. 

 L. Thomas, R. N. 



PLUMULARIA (p. 89) ECHINULATA. 



PL. pinnate, the pinnae alternate, one from each, internode ; 

 cells entire, remote ; vesicles ovate, echinated. (Fig. 80.) 

 C. W. Peach. 



Plmnularia echinulata, Lam. Anim. s. Vert. ii. 126: 2de edit. ii. 162. Blainv. 

 Actinol. 477. 



Hab. Harbours and estuaries, parasitical usually on Chorda 

 filum and Zostera marina. From an anchor in the Solwent, Isle of 

 Wight : quite common in Southampton water on Zostera : Fowey 

 harbour, not uncommon. C. W. Peach. 



This small and delicate species closely resembles Plumularia 

 setacea, from which it can be distinguished certainly by its ovarian- 

 vesicles only. These are roughened over with spines arranged in 

 rows on elevated striee or ribs, but the rows, in dried specimens, are 

 obscurely marked. They are ovate, sessile, erect, and are copiously 

 produced from the trailing root-fibres, and also from the pinnae, so 

 copiously indeed, that the polypidom is sometimes almost hidden by 

 them. The pinnse arise from near the upper part of the joints, and 

 curve outwards as usual, bearing, on their upper side, the polype 



