7242 Mollusks. 



species off the Clerk Rock, Millport, but the specimen was un- 

 fortunately lost before it had been examined. 



P. scabra (Bullaa pectinata). Rare ; I have only met with it out- 

 side the northern entrance of Lamlash Bay. 



Fam, XXI. Aplysiadce. 

 Aplysia hybrida. Young specimens in rock-pools at Curabrae. 



Fam. XXII. PleurohranchidcB. 



Pleurobranchus Plumula. Maybole, Smith. 



P. ? " Holy Island, at low water, found four individuals 



under stones ; probably they are Pleurobranchus membranaceus." — 

 Greville and Miles. It is more likely that they were P. Plumula, the 

 species recorded by Mr. Smith, and which was found in the Isle of 

 Man by the late Professor Forbes. P. membranaceus is essentially a 

 southern species. 



Fam. XXIII. Dorididce. 



Doris tuberculata. Low water, Cumbrae, and at Lamlash. 



D. flammea. I dredged a fine specimen in deep water to the west 

 of Cumbrae. Rothesay Bay, Alder. Lamlash, Landsborough. 



D. Johnstoni. Taken by Mr. Alder in Lamlash and Rothesay Bays. 



D. planata. Found by Mr. Alder when dredging in company with 

 Dr. Landsborough in Lamlash Bay ; it has not again been met with. 



D. aspera. Rothesay, Alder. 



D. bilamellata. Lamlash Bay, Landsborough. " Found under 

 stones at low water on Holy Island." — Greville and Miles. I have 

 also met with it at Cumbrae. 



Goniodoris nodosa. " Ardrossan ; plentiful near the Inch." — Alder 

 in litt. "One example on Holy Island."" — Greville and Miles. 



G. castanea. "Saltcoats, Mr. D. Landsborough, jun.*' — Alder and 

 Hancock. 



Triopa claviger. Common in the large rock-pool of the outer 

 Allans, and other parts of Cumbrae; also at Lamlash. 



^girus punctilucens. " Ardrossan and Isle of Man, Mr. Alder." — 

 Alder and Hancock. 



Polycera quadrilineata. Lamlash, Greville and Miles. Cumbrae 

 Island, Rev. D. Landsborough, Alder and Hancock. I have fre- 

 quently dredged it in the same locality. 



P. ocellata. Lamlash, Landsborough. 



