JOUENAL 



OF THE 



ROYAL MICROSCOPICAL SOCIETY. 



AUGUST, 1911. 



TRANSACTIONS OF THE SOCIETY. 



XIII. — Rotifera of some Pacific Islands: Collected by the Shackieton 



Antarctic Expedition, 1909. 



By James Murray, F.R.S.E. 



(Read May 17, 1911.) 

 Plates XIV., XV, 



Historical Sketch.— I have been able to gather very little 

 information about the Eotifera of any Pacific islands. Ehrenberg, 

 1853 {!)*, notes two Bdelloids in the Galapagos Islands {Callidina 

 rediviva and C. triodon). Semper, 1872 (3), discovered the remark- 

 able Trochosphcera in the Philippines. Weber, 1906 (6), records 

 three loricated Ploima from Honolulu. Eichters, 1908 (5), among 

 the material collected on Prof. Schauinsland's journey, found two 

 Bdelloids, Callidina angusticollis and 0. perforata, both in Samoa 

 and in Oahu. 



* The figures in brackets refer to the Bibliography at the end of paper. 



EXPLANATION OF PLATE XIV. 



Fig. 1. — Pleuretra brycei (Weber), variety. 



,, 2a. Ditto. Another variety. 



,, 2b. Side view of ditto. 



„ 2c. Ditto. Foot. 



,, 3a. — Callidina pacifica sp. n. 



„ 36. Ditto. Head. 



,, 3c. Ditto. Spurs. 



„ 4a. — Philodina plena (Bryce), variety. 



„ 4b. Ditto. Jaw. 



Aug. 16th, 1911 2 f 



