108 LIVERPOOL MARINE BIOLOGY COMMITTEE REPORT. 



Two small colonies without gonothecge, dredged off the 

 Isle of Man in August, 1885, resemble H. heanii more 

 nearly than any other species. The hydrothecse are mostly 

 single-jointed, but some have two joints. The polypites are 

 large. One large colony, about three inches in height, with 

 male gonothecse, about which I think there is not much 

 doubt, was also obtained off the south end of the Isle of 

 Man, in August, 1885. 



Family VIII. — Sertulauiid^. 



Sertidarella polyzonias^ Linnaeus. 



Recorded by Byerley as not uncommon among drift sea- 

 weeds ; seldom or ever found with living polypes. Mersey 

 (J. S. Hicks). Little Orme, June, 1880 (A. 0. Walker). 



Several good colonies with gonothecse were dredged off 

 the south end of the Isle of Man, in August, 1885. 



Dredged off Puffin Island and Anglesey, during the cruise 

 of the " Hyana" in May, 1885. 

 Sertularella rugosa, Linnaeus. 



Recorded by Byerley as being parasitic on Flustra 

 foliacea. Mersey (J. S. Hicks). 



Found at Hilbre Island, attached to colonies of Flu sir a 

 foliacea, on June 13th, 1885. 



Diphasia rosacea, Linnaeus. 



Sertularia rosacea, Johnst., B. Z. 64, pi. xi, fig. 1, ; 468, fig. 83. 



Recorded by Byerley under the name of Sertularia 

 rosacea, as being found rarely at New Brighton and else- 

 where, attached to Plumularia falcata. Mersey (J. S. Hicks). 

 Found at Puffin Island in June, 1880 (A. 0. Walker). 



Several colonies were obtained from the Welshman's Gut 

 during the *' Spindrift" expedition, on June 20th, 1885. 



A small colony, about half-an-inch in height, attached to 

 the stalk of a Tuhularia, along with some other zoophytes, 



