206 CEYLON PEARL OYSTER REPORT. 



LITERATURE REFERRED TO. 



(1.) Selenka. Zeit. wiss. Zool.,' XVIL, pp. 291-374, 1867. 



(2.) Semper. ' Reisen im Archipel der Philippinen,' 2. Th., 1. Band, 18G8. 



(3.) Hutton. ' Trans, and Proc. New Zealand Inst,,' 1878, vol. XL, pp. 305-308. 



(4.) Bell. 'Proc. Zool. Soc.,' 1883, Part I, pp. 58-62. 



(5.) Bell.' Zoological Collections of H.M.S. " Alert." ' 



(6.) Lampert. ' Archipel der Philippinen. Die Seewalzen,' 1885. 



(7.) Theel." Challenger," Holothnrioidea (Part II.), vol XIV., Part XXXIX. 



(8.) Bell. ' Sci. Trans. Roy. Dublin Soc.,' 1887, vol. III. (Series II.), pp. 643-657. 



(9.) Ludwig. ' S.-B. Akad. Berlin,' 1887 (pp. 1217-29). 



(10.) Sluiter." Fauna des Java-Meeres " ; 'Nat. Tij. v. Ned. Indie,' XLVIL, 1887. 



(11.) Sluiter. ' Nat. Tij. v. Ned. Indie,' XLIX, An. 2, p. 106, 1889. 



(12.) Ludwig. ' Bronn's Klassen u. Ord. d. Thierreichs, Echinodermen,' 2. Band, 

 3. Abth., 1889-1892. 



(13.) Ludwig. ' Mem. Mus. Comp. Zool. Harvard,' vol. XVIL, 3, 1894. 

 (14.) Mitsukuri. ' Annotationes Zool. Japonenses,' vol. 1, 1897, pp. 31-42. 

 (15.) Sluiter. ' Die Holothurien der Siboga Expedition,' 1901. 

 (16.) Bell. 'Ann. Mag. Nat. Hist.,' (5), vol. 19, 1887, p. 392. 

 (17.) Bell. 'Ann. Mag. Nat. Hist.,' (5), vol. 20, 1887, p. 148. 



(18.) Walter." Ceylon Echinodermen." ' Jenaische Zeitschrift,' XVIII., 

 pp. 365-384, 1885. 



(19.) Thurston. 'Notes on the Pearl, &c, and Marine Fauna of the Gulf of 

 Manaar.' Government Central Museum, Madras, 1890. 



