SERTULARIAD.E. 471 



Buclianness upon which were growing S. fallax, S, rosacea, S. 

 tamarisca, &c. 



S. ABiETiNA — with ripe ova in May 1845, off Southwold, and Huntly 

 Foot, forty fins. Noss head, Copinsha, &c. 



Sertularia filicula — with scattered ovaries off Tynemouth, in 

 May, 1845 — do. off Buchanness in forty fnis. on shingle, off 

 Copinsha, &c. 



Sertularia operculata — almost always on stems of Laminaria 

 dig. — Suffolk, Orkney, <fec. 



Sertularia argentea — gregarious upon stems of L. digitata. — 

 Suffolk, Yorkshire, &c. 



Sertularia cupressina — generally solitary upon shells and stones. 

 The stems are sometimes two feet long and nearly bare of 

 pinnae, from which other long straggling polypidoms spring 

 out. The embryo is a disk with a central nucleus — escaping 

 in Dec. 1845, Est, of Thames. F. of Forth, Orkney Isds., &c. 



Thuiaria thuia — not been found in fruit in March, April, or June 

 — off Staples, Yorkshire Coast, Inchkeith, Buchanness, Orkney 

 Isds, &c. 



Thuiaria articulata — taken from a muddy bottom in forty fms. in 

 April 1845, off the Tees. 



Antennularia antennina — Suffolk, Yorkshire, Buchanness, Orkney 

 Isds, &c. 



Antennularia ramosa — this species has the lateral trumpets — with 

 the preceding — with ova in seven fms. Kirkwall, Orkney Isds., 

 July 1846. 



Plumularia falcata — generally distributed. — It is worthy of re- 

 mark, that on a voyage from Thames to Scotland, in March 

 1845, not one specimen was taken with ova, while all those 

 in the Firth of Forth, were covered with them. — Earliest in 

 shallow water 1 



P. cristata — on Halidrys siliquosa (has it ever been found other- 

 wise"?) with ova in August 1845. Westra, Orkney Isds. 



P. piNNATA — Yorkshire coast to Orkney Isds. — It has never been 

 found in fruit — but my dredging has been confined principally 

 to spring months. Is not the spine beneath the cell, a broad, 

 transparent cellule 1 



P. SETACEA — associated with the preceding — Yorkshire coast thirty- 

 five fms. Aberdeen do. Copinsha. Fifteen fms. Stronza 

 Firth. Constantly with ova in May and June. 



P. Catherina — Yorkshire coast thirty-five fms. Aberdeenshire do. 



