FAUNA OF THE OUTER WESTERN AREA OF THE CHANNEL. 371 



Trophon muricatus (Montagu). 



One shell at Position 6, occupied by Eiipagurus cuanensis. 



Depth, 42 fath. 



NASSIDAE. 

 Nassa incrassata (Strom). 



One specimen at Position 44. 

 Depth, 46 fath. 



PLEUEOTOMIDAE. 

 Mangilia gracilis, P. Fischer. 

 At Positions 13 (one living), and 31 (one dead). 

 Depth, 40-42 fath. 



Clathurella linearis (Montagu). 



At Positions 7 (one dead), and 11 (one living). 

 Depth, 42 fath. 



OPISTHOBRANCHIATA. 



TECTIBBANCHIA TA. 

 SCAPHANDEIDAE. 

 Scaphander lignarius (Linnaeus). 



At Positions 7 (six), 8 (two), 24, 43 (one), 52 (one); all living 



except that at 52. 

 Depth, 42-45 fath. 



PLEUROBEANCHIDAE. 

 Oscanius membranaceus (Montagu). 



At Position 1 (one specimen, with spawn). 

 Depth, 40 fath. 



NUDIBRANCHIA TA. 



AEOLIDIIDAE. 

 Galvina tricolor (Forbes). 



At Positions 6 (one), 45 (five), 52 (several). 

 Depth, 42-47 fath. 



Facelina drummondi (Thompson). 



At Position 6 (one). 



Depth, 42 fath. 



DOTONIDAE. 

 Doto coronata (Gmelin). 



At Position 13 (one). 

 Depth, 42 fath. 



