190 Transactions of the Royal Canadian Institute 



This is the commonest Dendronotid in the vicinity of Nanaimo and 

 smaller specimens are not infrequently dredged. It has already been 

 noted that it is subject to considerable variation both in size and colour. 

 The animal in external appearance, in the shape of the cerata, oral veil, 

 apd rhinophore sheaths, apart from the fact that it reaches such a large 

 size, mark it off distinctly from any described member of the genus. 

 These externaj differences are also para,llel by differen^ces of the radula 

 and teeth so there can be little doubt that it is a new species. I have 

 proposed the name Dendronutus giganteus in order to call attention to its 

 large size. 



Habitat. — The animal has been dredged in from 10-25 fathoms from 

 a number of points; near Hall Island (Station 46), Brandon Island, 

 Round Island (Station 9), Dodd's Narrows (Station 30), Ruxton Passage, 

 Trindomali Channel, Port Simpson, and by far the largest specimen was 

 brought up in a seine net close to the laboratory. 



Dendronotus rufus sp. nov. 



The body in general appearance much resembles that of Hero formosa 

 as depicted by Eliot (7) save that the rhinophores have a sheath and the 

 oral veil is not so well marked but it is a typical dendronotid. The foot 

 is not distinctly marked off from the body. The dorsum is smooth and 

 bears two lateral series of fine branched cerata. A distinct but not well 

 developed veil is present and bears characteristic papillae. There are 

 four of these on each side. The innermost is simply branched with two 

 or three small side processes, this is followed by a simple conical papilla, 

 then by a branched papilla similar to the innermost and finally by 

 another simple conical papilla. 



The genital aperture is below and in front of the first dorsal cerata 

 on the right and the anal papilla lies more dorsally between the first and 

 second cerata on the same side of the body. The renal pore was not made 

 out. 



Colour. — In the living animal there is considerable range of colour 

 variation. The general body colour varies from a translucent grey 

 through a semi-transparent pink to a deep brick red. In the grey form 

 the cerata were of a pale pink cblour, in the pink form there was a narrow 

 line of darker, more opaque pink, running round the edge of the foot and 

 up around the head at the anterior end. A similar but less marked 

 darker line was also present in the red form. 



Dimensions. — The largest specimen measured 14 mm. long by 4.5 mm. 

 high and 4 mm. broad. 



