156 TlL\XSACTIONS OF THE ROYAL CANADIAN INSTITUTE 



is unnecessary to repeat his excellent description which I have been able 

 to verify in practically all points from my own dissections. 



Habitat. — It is fairly common at any rate in April, May and June 

 on the rocks and in tide pools around Departure Bay, Jesse Island, New- 

 castle Island and Brandon Island and has also been found at False 

 Narrows, Mudge Island and the Lagoon near Hammond Bay. Others 

 were dredged in 25-30 fathoms in Fairway Channel off Gabriola Island 

 (Station 4). As it has also been collected in Alaska and Southern Cali- 

 fornia it is probably generally distributed all along the west coast of 

 North America. Superficially this species resembles the next, Anisodoris 

 nohilis, a point that will be dealt with later. 



Genus Anisodoris (Bergh). 



Anisodoris Bergh, Die Opisthobranchien der Sammlung Plate, Fauna 



Chilensis, Heft 3, 1898, p. 508. 

 Montereina MacFarland, Proc. Biol. Soc, Washington, Vol. XVIII, 



Feb. 1905, p. 38. Bull. Bur. Fisheries, Washington, Vol. XXV, 1905, 



p. 116. 

 So far the species of this genus recorded by Bergh and MacFarland 

 are from Chile and Monterey Bay, that is from the Pacific coast of South 

 America and southern North America. The present record extends the 

 northern limit of the genus. 



Anisodoris nobilis (MacFarland). 



Montereina nobilis MacFarland. Proc. Biol. Soc, Washington, XVIII, 



Feb. 1905, p. 38. 

 Anisodoris nobilis MacFarland, Bull. Bur. Fisheries, Washington, XXV, 

 1905, p. 116, pi. XXII. 



Body. — The plump body is a somewhat elongated elipse with the 

 ends about equally rounded, relatively a little broader than the preceding 

 species. The dorsum is more arched rising more abruptly anteriorly 

 than posteriorly; it is covered with tubercles of various sizes with some- 

 what dilated ends. The mantle is thick and everywhere extends beyond 

 the level of the foot save that in motion the tail of the foot may protrude 

 a short way. 



Colour. — ^The general ground colour of the whole animal is deep bright 

 yellow or orange yellow with a number of small dark brown or black 

 patches on the back. Again although well over 100 specimens have been 

 seen alive none has quite so many dark pigmented spots on the dorsum 

 as shoviTi in MacFarland's figure (pi. XXII). Two specimens taken from 

 the float at the Station on loth and one large one on 28th of June, 19 19, 

 were of an opaque dead white colour without any trace of yellow colour 



