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selt); Benkulen, près Sumatra (E. Von \lartens); tonga- 

 Tabou (Quoy et Gaimard). 



2. Placobranchus Argus, Bergh. 



P. Argus, Bergh, Malak. Unters. in C, Seraper Reis. Phi- 

 lippinen, vol. II, p. 151, pi. ix, fig. 6-9, 1872. 



Hab. Honolulu, îles Sandwich (H. Pease; Reinhardt). 



3. Placobranchus ianthobaptus, Gould. 



P. ianthobaptus, Gould, Explor. Exped. Shells, p. 307, 

 pi. XXVI, fig. 407 a, b, c, 1852. 



Hab. Honolulu, îles Sandwich (Couthouy). 



4. Placobranchus grâcilis, Pease. 



P. grâcilis, Pease, Amer. Journ. Conchol., vol. VI, p. 303, 

 pi. XXI, fig. 1 a, b, 1871. 



Hab. Taïli (A. Garrett). 



5. Placobranchus variegatus, Pease, 



P. variegatus, Pease, Amer. Journ. Conchol., vol. VI, 

 p. 305, pi. XXI, fig. 2 a, 6, 1871 . 



Hab. Ile Huaheine (A. Garrett). 



6. Placobranchus Camiguinus, Bergh. 



P. Camiguinus, Bergh, Malak. Unters. in C. SemperReis. 

 Philippinen, vol. II, p. 167, pi. xix, fig. 14-19, 

 1872. 



Hab. Ile de Camiguin, au N. de Luçon, Archipel des 

 Philippines (C. Semper). 



7. Placobranchus punctulatus, Bergh. 



P. punclulalus, Bergh, Malak. Unters. in C. Semper Reis. 



