430 Dr. W. C. M'lntosh on the 



Fam. 6. Dendronotidae. 



Genus 1. Dendeonotus, Alder & Hancock. 



Dendronottis arborescens, Miiller ; A. & H. B. Nud. M. 

 fam. 3, pi. 3. 



Not uncommon amongst zoophytes from deep water, on 

 laminarian blades thrown on the West Sands, and occasionally 

 at extreme low water. A white variety is sometimes seen. 



Fam. 8. Tritoniidae, H. & A. Adams. 



Genus Teitonia, Cuvier. 



Tritonia Homhergi, Cuv. ; A. & H. B. Nud. M. fam. 2, pi. 2. 



From deep water. Both pale and deep reddish-brown 

 varieties are found on the zoophytes in the fishing-boats. 

 Occasionally in the stomach of the cod. 



Tritonia j>leheiaj Johnston ; A. & H. B. Nud. M. fam. 2, pi. 3. 



In vast numbers amongst the zoophytes from deep water, 

 in the crevices of Alcyonium digitatum and on Halecium 

 tossed ashore after storms. One specimen showed the abnorm- 

 ality of a bifid tail. 



Suborder III. ACANTHOBRANCHIATA. 



Fam. 1. Polyceridae. 



Genus 1. ^gikus, Loven. 



jMgirus pMnc^zYwcews, D'Orbigny ; A. & H. B. Nud. M. 

 fam. 1, pi. 21. 



Not uncommon under stones in rock-pools between tide- 

 marks at the East Eocks. 



Genus 2. Triopa, Johnston. 

 Tricypa damger^ Midler ; A. & H. B. Nud. M. fam. 1, pi. 20. 



Fine specimens are occasionally found under stones near 

 low-water mark. The same Eigasilus is parasitic on this as 

 on Doris. 



Genus 5. Poltceea, Cuvier. 



Polycera quadrilineata^ Muller ; A. & H. B. Nud. M. 

 fam. 1, pi. 22. 



Not uncommon near low-water mark and in the laminarian 

 region. 



