267 



REPORT on the NUDIBRANCHIATA of the 

 L. M. B. C. DISTRICT. 



By W. a. Herdman, D.Sc, F.L.S., 



PROFESSOR OF NATURAI, HISTORY IN UNIVERSITY COLLEGE, LIVERPOOL. 



This region of the Irish sea has an abundant Nudibranch 

 fauna, and one spot in the neighbourhood of Liverpool, 

 namely, Hilbre Island, is justly celebrated as being the 

 original locality for Antiopa hyalina, and some other rare 

 forms, and also on account of the number of other species 

 found on its shores. 



Mr. Byerley, in 1855, gave a list of twenty-two species 

 of Nudibranchs, illustrated by a coloured figure of Antioim 

 hyalina. This list included several very rare forms which had 

 been first discovered by himself and by Mr. Price, and had 

 been described by Messrs. Alder and Hancock, in their Ray 

 Society Monograph.* 



A few years later (1860), Dr. Collingwood published lists 

 of the Nudibranchiate Mollusca of the Mersey and the Dee 

 in the Annals and Magazine of Natural History A Dr. 

 Collingwood recorded twenty-eight species. 



I am indebted to Mr. J. Price, of Chester, for having 

 very kindly placed at my disposal his MS. notes on the 

 Fauna of the Estuary of the Mersey, dating back as far as 

 1840 ; some of the records of species given below are on 

 Mr. Price's authority. 



* " British Nudibranchiate Mollusca," 1844-1855. 

 • t See this volume, p. 25. — Ed. 



