SCOTTISH ROTIFERS, COLLECTED BY THE LAKE SURVEY. 



201 



Diaschiza eva, Gosse 

 Monostyla lunaris, Ehr. 



„ cornuta, Ehr. . 

 Distyla flexilis, Gosse 

 Cathypna ungulata, Gosse 

 Colurus obtusus, Gosse 

 Metopidia acuminata, Ehr. 

 Brachionus bakeri, Ehr. . 



Orkney. 



Ward Hill, 

 Rousay. 



Hoy 



Shetland. 



Mainland. 

 Ronas Hill. 



Mainland. 

 Mainland. 

 Mainland. 

 Ronas Hill. 

 Ronas Hill. 



LITERATURE. 



(1) Bryce, D., "On the Macrotrachelous Callidinse," Journ. Quekett Micr. Club, Ser. II., vol. v., 



1892, p. 15. 



(2) ,, "On Two New Species of Macrotrachelous Callidinse," Journ. Quekett Micr. Club, 



Ser. II., vol. v., 1893, p. 196. 



(3) ,, " Farther Notes on Macrotrachelous Callidinse," Journ. Quekett Micr. Club, Ser. II., 



vol. v., 1894, p. 436. 



(4) Janson, 0., Die Rotatorien-Familie der Philodineen, Marburg, 1893. 



(5) Lauterborn, R., "Die pelagischen Protozoen u. Rotatorien Helgolands," Wiss. Meeresuntersucli. 



Biol. Anstalt auf Helgoland, 1894, p. 207. 



(6) Murray, J., "A New Family and Twelve New Species of Rotifera," Trans. Hoy. Sor. Edin., xli., 



1905, p. 367. 



(7) „ "The Rotifera of the Scottish Lochs," Trans. Roy. Soo. Edin., xlv., 1906, p. 151. 



(8) Weber, E. F., "Faune Rotatorienne du Bassin du Leman," Rev. Suisse de Zool., v., 1898, p. 264. 



EXPLANATION OF PLATES. 



In order to indicate relative sizes of different species, all the drawings of complete animals are made 

 to one scale, except that of C. minuta. To show sufficient detail, this had to be drawn nearly twice as large 

 as the others. 



Plate I. 



1. Philodina convergens, sp.n., dorsal view, feeding. 



2. ,, ,, jaw, seen from behind. 



3. ,, ,, spurs and toes. 



4. Callidina circinata, sp. n., dorsal view, feeding. 



5. „ ,, head, morehighlymagnified. 



6. „ ,, head and neck, when creep- 



ing. 



7. Callidina circinata, section of neck and antenna. 



8. „ „ jaw. 



9. ,, „ foot. 



10. ,, ,, spurs and perforate disc. 



11. Callidina minuta, sp. n., dorsal view, feeding. 



12. ., „ head more highly magnified. 



13. Philodina brycei, Weber, variety. 



Plate II. 



14. Callidina plicata, Bryce, type, feeding. 



20. Callidina cornigera, Bryce, side view, feeding. 



15. ., ,, head, on larger scale. 21. 



16. ,, ,, var. hirundinella, var. nov., 22. 



rump and foot, showing 23. 



processes. 



17. ,, ,, var. hirundinella, side view 24. 



of foot. 



18. „ „ var. hirundinella, showing 25. 



processes crossed. 26. 



19. ,, ,, foot of variety without 



flanges on hood. 



TRANS. ROY. SOC. EDIN., VOL. XLVI. PART I. (NO. 7). 



dorsal view, feeding, 

 head, seen from above, 

 side view of rostrum, 



lamellae, and antenna, 

 dorsal view of rostrum and 



lamellae, 

 jaw. 

 foot. 



29 



PRESMTED 



12 M. 1208 



