2o6 Transactions of the Royal Canadian Institute 



as distinct species. Further, satisfactory material of both has been 

 obtained and this has been sufficient to merit their being recognized 

 as valid species. 



The species Chioraera leonina, previously but little known and poorly 

 described, has been more fully dealt with and placed in a new genus. 

 Chioraeridae. 



The following species in the list have been recorded previously both 

 from Alaska and California and so probably occur in suitable localities 

 between these points: Tritonia exsulans, Archidoris montereyensis , Diau- 

 lula sandigensis and Hermissenda opalescens. 



The following species in the list have been recorded previously only 

 from Alaska on the Pacific Coast of North America and their range is 

 thus extended considerably to the south: Acanthodoris pilosa var albes- 

 cens, Lamellidoris bilamellata, Dendronotus arborescens, D. dalli and 

 Aeolidida papulosa. The last named while not recorded from California 

 has been described from Southern Patagonia and is one of the widest 

 ranging species known, so it may occur in California. 



The following species in the list have been recqrded previously only 

 from California on the Pacific Coast of North America and so have 

 their range extended considerably to the north: Tritonia exsulans, 

 Anisodoris nobilis, Cadlina marginata, Pleurophyllidia californica, Dirona 

 albolineata, and Chioraera leonina. 



Complete colour notes from living specimens have been given for the 

 first time for the following previously noted forms: Triopha elioti, 

 Acanthodoris pilosa, var albescens Pleurophyllidia californica, Chioraera 

 leonina, Coryphella fusca and Hermissenda opalescens. Additional colour 

 notes have been given of the other species. 



List of References. 



1. Alder and Hancock, A Monograph of the British Nudibranchiate 

 Mollusca, parts I- VI I, London, 1845- 1855. 



2. Bergh, R., On the nudibranchiate Gasteropod Mollusca of the North 

 Pacific Ocean, with special reference to those of Alaska. Pt. I, 

 Proc. Ac. Nat. Sci., Philadelphia, Pt. I, 1879. Pt. II, Proc. Ac. Nat. 

 Sci., Philadelphia, Pt. I, 1880, also published in "Scientific Results 

 of the Exploration of Alaska", Vol. I, Art. V. 



3. Ibid., "Die Opisthobranchien " from "Reports on the Dredging 

 Operations of the West Coast of Mexico, and in the Gulf of California, 

 in charge of Alexander Agassiz carried on by the U.S. Fish Com- 

 mission Steamer 'Albatross' during 1891". Bull. Mus. Comp. Zool. 

 Harvard, Vol. XXV, No. 10, Oct. 1894. 



