268 LIVERPOOL MARINE BIOLOGY COMMITTEE REPORT. 



NUDIBRANCHIATA. 



Sub-order.— ACANTHOBKANCHIATA. 



Family. — Doridid jr. . 



Archidoris * tuherculata, Cuvier. 

 This species is not uncommon in this neighbourhood. 

 Byerley records it from Hilbre Island, Caldy Blacks, and the 

 rocks at New Brighton. It is very variable in size and 

 colouring. Alder and Hancock state that a specimen five 

 inches in length was obtained by Mr. Price on the coast of 

 North Wales in 1852. It has been taken by the Committee 

 frequently at Hilbre Island, and other places in the neigh- 

 bourhood. 



It was found frequently on the rocks at Port Erin, Isle of 

 Man, during August. 



Archidofis johnstoni, Alder and Hancock. 

 One specimen was found by Mr. Byerley, at Hilbre Island, 

 in 1851. Mersey and Dee, once or twice (Oollingwood). 



Archidoris flammea. Alder and Hancock. 

 This rare species was dredged by Prof. Ed. Forbes off 

 Ballaugh, Isle of Man, from a depth of twenty-five fathoms. 



Lamellidoris hilamellatciy Linnaeus. 

 Recorded by Byerley and by Price from New Brighton, 

 Hilbre Island, &c. Byerley states that the large brown 

 variety is sometimes plentiful on the rocks at Hilbre, while 

 *'a smaller and lighter coloured variety is abundant on the 

 dock wall at Woodside, and along the Cheshire side of the 

 Mersey." Mr. Price informs me that this species used to be 

 of particularly large size at Tranmere. It spawns in March, 

 and disappears from the shore at the end of May. 



* Bergh, in \x\b Report upon the " Challenger ^^ Nudibranchiata, replaces, 

 for reasons there explained {lac. cit., p. 84), the Linnaean Doris by the new 

 generic title Archidoris, which I have adopted. 



