228 NUDIBRANCHIATA COLLECTED IN THE NORTH SEA 



10. Corypliella gracilis (A. & H.) 



11. C. lineata (Loven). 



12. G rufihranchialis (Johnst.). 



13. G. salmonacca (Couth.). 



14. Facelina drummondi (Thomp.). 



Lomanotidse. 



15. Lomanotus genei (Verany). 



Dotonidae. 



16. Doto coronata (Gmelin). 



17. D. fragilis (Forbes). 



Dendronotidae. 



18. Dendronotus arborcsccns (Muller). 



Tritoniidse. 



19. Tritonia homhcrgi, Cuvier. 



20. T. pleheia, Johnston. 



Dorididse. 



21. Archidoris testudinaria (A. & H.). 



22. A. tuherculata (Cuvier). 



Polyceridse. 



23. Acanthodoris pilosa (Miiller). 



24. A. suhquadrata (A. & H.). 



25. Lamellidoris hilamellata (Linn.). 



26. Goniodoris castanea, A. & H. 



27. Idaliella aspersa (A. & H.). 



28. Ancula cristata (Alder). 



While following Bergh, Vayssiere, Trinchese, and other authors in 

 regarding Goryphella rufihranchialis, C. 2)dlucida and G. landsburgii as 

 synonyms, I have preferred to treat G. gracilis as a good species, and 

 also describe Goryphella salmonacca as occurring in the British area. 



^OLIDIA PAPILLOSA (Linn). 



Voyage XCVI. Station. 15. Lat. 54° 30' N. Long. 3° 59' E. 25 fathoms. 



1 specimen. 



Length 2 cm. The colouration almost identical with that of most 



littoral specimens. The triangular white mark on the head prominent. 



Oral tentacles of a clear wliite, spotted with opaque white. Body, 



