70 



1840 — 1886. Tichogoina bilocitlaris, T. Wiegmanii and T. kraussi Kiister & Clessin in Martini & 

 Chemn. Conch.-Cab., VIII (3), Mytilidae p. 10, pi. II, figs. 11 — 17, p. 11, pi. II, 

 figs. 6 — 10 and p. 14, pi. VI, figs. i — 6. 



1887. Mytilus [Septifer) bilocidaris von Martens. Journ. Linn. Soc. London, (Zool.), XXI, p. 205. 



1890. Septifer bilocitlaris, S. Kraussi and 5. Nicobariciis Paetel, Cat. Conch. Samm., III, 



pp. 201, 202. 



1891. Septifer bilocitlaris Fischer, P., Bull. Soc. Hist. Nat. d'Autun, IV, p. 214. 

 1895. Septifer bilocitlaris Pilsbry, Cat. Mar. Shells Japan, p. 141. 



1897. Septifer Nicobaricits Sowerby, Marine Shells S. Africa, Suppl., p. 27. 



1898. Septifer Nicobaricits Melvill & Sykes, Proc. Malacol. Soc. London, III, p. 45. 



1899. Septifer nicobariciis Melvill & Standen, Journ. Linn. Soc. London (Zool.), XXVII, p. 184. 



1900. Septifer bilocularis Smith, Proc. Zool. Soc. London, p. 118. 



1901. Mytilus Cummingianits Sturany, Denkschr. Kais. Akad. Wiss. Wien. (Math. -Nat. ), LXIX, 



p. 288. 



1903. Septifer bilocularis Smith, Faun. Geogr. Maldive Laccadive Archipel., II, p. 623. 



1904. Septifer bilocularis Smith, Ann. Mag. Nat. Hist. (7) XIV, p. 11. 



1905. Septifer bilocularis Jukes-Brown, Proc. Malacol. Soc. London, VI, p. 223. 



1905. Septifer bilocularis Dautzenberg & Fischer, H., Journ. Conchyliol., LUI, p. 45. 



1906. Septifer bilocularis Hidalgo, Cat. Filip., p. 362. 



1906. Septifer bilocularis Hedley, Proc. Linn. Soc. N. S. Wales, XXXI, p. 464. 



1906. Septifer bilocularis Lamy, Bull. Mus. d'Hist. Nat. Paris, XII, p. 316. 



1906. Septifer bilocularis Standen & Leicester, Ceylon Pearl Oyster Rept., V, p. 290. 



1906. Septifer bilocularis Owston, Japan Loochooan Shells, p. 34. 



1906. Septifer bilocularis Dautzenberg, Journ. Conchyliol., LIV, p. 29. 



1906. Septifer bilocularis Melvill & Standen, Proc. Zool. Soc. London, p. 799. 



1909. Septifer bilocitlaris Lamy, Mém. Soc. Zool. France, XXII, p. 338. 



1909. Septifer bilocularis Lynge, D. Kgl. Dansk. Vidensk. Selsk. Skr. Nat. -Math., (7) V, p. 135. 



1909. Septifer bilocularis Melvill, Trans. Linn. Soc. London, (Zool.), XIII, p. 1-23. 



1910. Septifer bilocularis Hedley, Austr. Ass. Adv. Sci., XII, p. 346. 



191 1. Septifer bilocularis Pelseneer, "Siboga" Lamellibranches (Anat.), pi. VI, figs. 6 — 10. 

 1917. Septifer bilocularis Odhner, Kungl. Sv. Akad. Handl., LU n". 16, p. 18, figs. i, 2. 



1919. Septifer bilocularis Odhner, Ark. Zool., XII (n", 6), pp. 6, 25. 



1920. Mytilus bilocularis Lamy, Bull. Mus. d'Hist. Nat. Paris, XXVI, p. 334. 



1925. Mytilus bilocularis Oostingh, Comm. Geol. Inst. Agri. Univ. VVageningen, N'\ 9, p. 263. 



1929. Septifer bilocitlaris Dautzenberg, Faun. Colon. Français., III, p. 571. 



1930. Septifer bilocularis Cox, Mon. Geol. Dept. Hunterian Mus. Glasgow Univ., N". 4, p. 151. 

 1930. Bracliyodontes [Septifer) bilocitlaris Thiele, Faun. Sudwest Austral., V, p. 590. 



In addition to the species included in the synonymy given above Smith (1885) suggested 

 that Mytilus pilosus Reeve (op. cit., pi. VIII, fig. 35) of unknown habitat should be referred 

 to this species. I hâve unfortunately not been able to see the type of M. pilostis and can offer 

 no opinion about it. 



Odhner (191 7) recently published a detailed description and figures of the original of 

 the LiNNEAN spécimen from the collections at Uppsala, and after comparing it with the Australian 

 form suggested that the latter should be separated as a distinct variety. 



The "Siboga" spécimens are ail half grown shells ; the height of the largest spécimen 

 being 29 mm. In gênerai appearance (Plate I.', figs. 21 — 24) they resemble spécimens from 

 Australia and other localities in the collections of the British Muséum (Nat. Hist.), London, but 

 their dorsal margin slopes very much more sharply to the outer edge. 



Distribution: — B. [S^ biloczilains is widely distributed in the Indo-Pacific area and is 

 also found in the Red Sea. 



