87 



CATALOGUE OF THE HYDROZOA OF THE 

 NORTH-EAST COAST. 



(NOETHUMBERLAND AND DURHAM.) 



By J. H. ROBSON, B.SC. 



Two catalogues * of the Zoophytes of Northumberland and 

 Durham have been pubhshed by the Tjmeside Naturahsts' Field 

 Club, followed by additional lists and notes in the Transactions of 

 the Natural History Society of Northumberland, Durham and 

 Newcastle -on-Tyne. In the present paper these separate accounts 

 are gathered together to form a complete catalogue, and the hst 

 has been brought up to date by the addition of notes made at 

 the Laboratory during 1912 and 1913. The arrangement followed 

 ill this catalogue is that adopted by Professor Hickson in the Cam- 

 bridge Natural History (1906). The name printed in itaUcs after 

 the present title is that under which the species appeared in 

 Alder's catalogue. 



A number of species (20) appearing in the earlier records 

 have not been obtained in the recent investigations ; these are 

 chiefly Calyptoblastea. On the other hand, eight Calyptoblastea, 

 six Leptomedusse, and seven Gymnoblastea (including one new 

 species) have been added to the list. These are indicated by an 

 asterisk. 



The material has been obtained from a variety of sources, 

 and includes preserved specimens dredged by the " Evadne " 

 during the summer months (reported on in a previous paper) ; 

 living material from the rocks and pools near Cullercoats, and 

 from the fishing boats ; while the Laboratory tanks furnished a 

 number of the medusoid forms. 



HYDROZOA. 



Family BouGAiNviLLnDJE. 



The new species of Hydrozoa described on page 104 will pro- 

 bably be included in this family. 



♦Those of Dr. Johnston (1832) and Joshua Alder (1858). 



