

Some Northern Hydroid Zoophytes. 219 



XXIII. — Some Northern Hydroid Zoophytes obtained by Hull 

 Trawlers ; with Description of a new species of Plumularian. 

 By James Ritchie, M.A., B.Sc, Royal Scottish Museum. 



(Read 23rd October 191 1. MS. received 13th November 1911.) 



Thh: specimens recorded below were collected by Mr John Thompson of Hull, 

 in the nets of trawlers belonging to that port which had just returned from 

 their fishing grounds in the North Sea and in the neighbourhood of Iceland. 

 While some of the species thus obtained are by no means uncommon, some 

 have been found in areas little investigated, and others — the majority 

 belonging to the group of Statoplean Plumularians — have been so seldom 

 observed that I have been able to make some additions to our knowledge of 

 their structures. One of the latter I regard as a species new to science. On 

 these accounts it seems well to put on record the results of Mr Thompson's 

 collecting. 



SPECIES EECOEDED. 



GYMNOBLASTEA. 



EUDENDRID^E. 



Eudendrium ramosum (Linn.). 

 CALYPTOBLASTEA. 



HaLECIDyE. 



Hcdecium beanii, Johnston. 

 Halecium halecinum (Linn.). 

 Halecium mnricatiim (Ell. & Sol.). 

 Campanularid^e. 



Campanularia vohtbilis (Linn.). 



LAFOEID.E. 



Lafo'ea dumosa (Fleming). 

 Grammaria dbietina, M. Sars. 



SERTULARIDiE. 



Diphasia fallax (Johns.). 

 Diphasia rosacea (Linn.). 

 Selaginopsis hartlaubi, Nutting. 

 Plumularid^e. 



Plumularia pvnnata (Linn.). 

 Antenella secundaria (Linn.). 

 Cladocarpus bonneviece, Jaderholm. 

 Cladocarpus campanulatus, sp. nov. 

 Halicornaria integra (G. 0. Sars). 

 VOL. XVIII. . S 



