NUDIBRANCHS OF THE VANCOUVER REGION 20"] 



3a. Ihid., "The Opisthobranchiata of South Africa." Trans, of the 

 S. African Phil. Soc. Vol. XVII, 1908. 



4. Cockerill, T. D. A. and Eliot, C, "Notes on a Collection of Cali- 

 fornian Nudibranchs", Jour. Malacol, Vol. XII, 1905. 



5. Cooper, "New Species of California Mollusca", Proc. Calif. Acad. 

 Sci., 1863. 



6. Ibid., New or Rare Mollusca inhabiting the Coast of California", 

 Proc. Calif. Acad. Sci., 1863. 



7. Eliot, C, "A Monograph of the British Nudibranchiate Mollusca", 

 Part VIII, Supplernentary, London, 1910. 



8. Fewkes, J. W., "New Invertebrata from the Coast of California", 

 Boston, 1889. 



9. Gould, "United States Exploring Expedition" quoted by Adams 

 "Generaof Recent Mollusca", 1858, Vol. II, p. 71. 



10. MacFarland, F. M., "A Preliminary Account of the Dorididae of 

 Monterey Bay, California". Proc. Biol. Soc, Washington, Vol. 

 XVIII, Feb. 1905. 



11. Ibid., "Opisthobranchiate Mollusca from Monterey Bay, California 

 and Vicinity". Bull. Bureau of Fisheries, Washington, Vol. XXV, 

 May 1906. 



12. Ibid., "The Nudibranchiate family Dironidae", Zool. Jahrb. Supp., 

 XV, 1912. 



13. Steams, R. E. C, "Descriptions of a New Genus and Two New 

 Species of Nudibranchiate Mollusks from the Coa.st of California", 

 Proc. Calif. Acad. Sci., 1873. 



Explanation of the Plates. 



All figures were drawn from my own preparations with the aid of a 

 Zeiss camera lucida and at the magnifications stated. 



Plate I. 



Tritonia diomedia middle and first lateral teeth X 105. 

 T. diomedia 3 lateral teeth next to innermost X 105. 

 T. diomedia 3 lateral teeth near outer edge X105. 

 Tritonia exsulans middle and first lateral teeth X 63. 

 T. exsidans 4 lateral teeth near outer edge X 63. 

 6. T. exsidans 4 lateral teeth next to innermost X63. 



Archidoris montereyensis 3 inner teeth slightly latteral view 



X105. 

 A. montereyensis 3 lateral teeth near outer edge X 105. 

 Anisodoris nobilis 3 inner teeth slightly lateral viewXio5. 

 A. nobilis 3 lateral teeth near outer edge X 105. 



