NUDIBRANCHS OF THE VANCOUVER REGION 



149 



Other authorities, but this is duly noted. The pharyngeal complex of 

 each species has been examined, where possible several radulae mounted 

 and in nearly all cases the animal was dissected. All the drawings were 

 made from my own preparations and were made by means of the camera 

 lucida. 



The list is practically complete as far as the available material is con- 

 cerned but one or two forms have been omitted as their preservation is 

 not good and they are better left undescribed until further material 

 renders their identification easier and more certain. 



The following species' are recorded: 



II. Cladohepatica. 



Pleurophyllidia calif ornica. 

 Dirona albolineata. 

 Dendronotus arhorescens. 

 Dendronotus dalli. 

 Dendronotus giganteus. sp. vov. 

 Dendronotus ruber, sp. nov. 

 Chioraera leonina. 

 Coryphella fusca. sp. 

 CorypheUa trilineata. 

 Aeolidida papulosa. 

 Doto Columbiana, sp. 

 Hermissenda pales cens. 



nov. 

 sp. nov. 



nov. 



I. HOLOHEPATICA. 



Tritonia diomedia. 

 Tritonia exsulans. 

 Archidoris montereyensis. 

 Anisodoris nobilis. 

 Diaulula sandiegensis . 

 Cadlina marginata. 

 Laila cockerelli. 

 Triopha elioti. sp. nov. 

 Acanthodoris pilosa var albescens. 

 A canthodoris hudsoni. 

 Acanthodoris brunnea. 

 Acanthodoris nanaimoensis . sp. nov. 

 Lamellidoris bilamellata. 

 Idalia Vancouver ensis. sp. nov. 



Type specimens of each have been placed in the museum of the Biological 

 Station at Nanaimo. 



I am glad of this opportunity of expressing my thanks to Dr. C. 

 McLean Fraser, Curator of the Pacific Coast Biological Station not only 

 for placing the material at my disposal but also for his unfailing kindness 

 and courtesy to me during my stay. 



The question of the classification of this as of any other group of 

 animals is a vexed one and much of it appears to be ultimately a matter 

 of preference. It is not intended therefore to enter into a discussion of 

 that subject here but to adopt the scheme put forward by Eliot in 

 "British Nudibranchiate Mollusca Part VIII" Supplementary 1910. It 

 may be briefly outlined as follows. 



The EuTHYNEUROUS Gastropoda are divided into two orders, 

 the PuLMONATA and the Opisthobranchiata and the latter again into 

 two sub-orders, the Tectibranchiata and the Nudibranchiata. It is 

 with the last sub-order alone that we are concerned here. The NuDi- 



