REPORT ON THE NUDIBRANCHIATA. 269 



Lamellidoris depressa, Alder and Hancock. 

 Mr. Byerley states that he once met with a specimen of 

 this small species at Hilbre Island. 



Lamellidoris proxima, Alder and Hancock. 

 This species was first discovered on the Birkenhead shore 

 by Mr. Price. He informs me that he found it abundant 

 and spawning, on February 21st, 1845. Mr. Byerley records 

 that it was extremely common on the shore between Egre- 

 mont and New Brighton in August, 1855. He has also 

 taken it freely at Hilbre Island, and had met with white and 

 yellow varieties. 



Acanthodoris pilosa, Miiller. 



This species is not uncommon ; Byerley records it from 

 " Hilbre Island, Caldy Blacks, and other rocky places." He 

 also mentions having obtained a deep purplish-black variety 

 at Hilbre ; this is the Doris nigricans of Fleming, it has 

 been taken in the Firth of Forth.* 



The ordinary light-coloured form of Acanthodoris pilosa 

 has been found several times lately at Hilbre Island by the 

 Committee. 



Acanthodoris quadrangidata, Alder and Hancock. 

 Doris subquadrata. Alder and Han. 



The second specimen known of this rare species was 

 found by Mr. Byerley and Mr. Webster at Caldy Blacks, 

 and was examined and named by Mr. Alder. 



Family. — Polycerid^ . 



Goniodoris nodosa, Montagu. 

 Isle of Man (Forbes). 

 Penmaen-rhos and Llandrillo Bay, North Wales (Price.) 



* See Leslie and Herdman, The Invertebrate Fauna of the Firth of Forth, 

 Edinburgh, 1881, p. 103. 



