258 RITTER 



Ritter, Wm. E. 



1900 Some Ascidians from Puget Sound, Collections of 1S96. Annals N. Y. 

 Acad. Sci., Vol. XII, No. 14, pp. 5S9-616. 



Roule, Louis. 



1885 Recherches sur les Ascidies simples des C6tes de Provence. Annales 

 des Sciences Naturelles, 6 serie, T. XX, pp. 1-229. 



Sluiter, Ph. 



1900 Tunicaten aus dem stillen Ocean. Ergebnisse einer Reise nach dem 

 Pacific (Schauinsland, 1896-1S97). Zoologische Jahrbiicher, XIII Bd. 

 PP- 1-35- 

 Stimpson, Wm. 



1864 Description of new species of Marine Invertebrates from Puget Sound 

 collected bj the naturalists of the North-West Boundary Commission, 

 A. H. Campbell, Esq., Commissioner. Proc. Acad. Nat. Sci., Phila., 

 Vol. 16, pp. 153-161. 



Traustedt, M. P. A. 



1884 Ascidiae simplices fra det stille Ocean. Vidensk. Meddel. fra den 

 naturh. Foren., pp. 1-60. 



