Messrs Leslie and Herdman on Invertehrata of Firth of Forth. 73 



COELENTERATA. 



In the present part we can only give lists of the Hydroida 

 and Alcyonaria, as the other sections of the Coelenterata, 

 viz., the Zoantharia, the Acalepha, and the Ctenophora have 

 not yet been sufficiently worked, and the material at our 

 disposal is not extensive enough to enable us to compile 

 anything like complete lists of these groups. 



So far as the Hydroid Zoophytes are concerned, however, 

 we have had plenty of material. They have always been a 

 favourite group with marine zoologists, and have been 

 studied in the Firth of Forth by successive generations 

 of naturalists, who have frequently been rewarded by the 

 discovery of species new to science. 



Professor AUman and Dr Strethill Wright, whose researches 

 we have already referred to in the Introduction, have con- 

 tributed largely to our knowledge of the Hydroids. The 

 section of Dr "Wright's work most interesting to us, in con- 

 nection with these lists, is his careful investigation of the 

 more minute Zoophytes, among which he discovered so many 

 new species — especially in the Athecata. Further work of 

 the same description among the smaller Campanularians 

 would almost certainly yield interesting and valuable results. 



The nomenclature and arrangement in the following list 

 are those given in Hinck's " History of the British Hydroid 

 Zoophytes," from which we have in various ways derived the 

 greatest assistance. For many of our names and localities 

 we are indebted, in addition to the last-mentioned work and 

 Dr Wright's papers, to Allman's " Gymnoblastic Hydroids," 



