THE ROTIFERA OF THE SCOTTISH LOCHS. 



191 



Plate IV. 



14. Adineta tuberculosa, Janson. 



15. Rotifer socialis (Kellicott). 



a, animal with foot partially retracted. 



b, small-scale drawing, to show proportions. 



c, jaw. 



d, antenna. 



e, foot, last three segments, and toes. 



16. Callidina aspera, Bryce. 



a, dorsal view, feeding. 



b, jaw. 



c, portion of trunk, showing tubercles. 



17. Microdina paradoxa, Murray, with jaws pro- 



truded, biting a filament of Alga. 



Plate V. 



18. Pxeudcecistes rotifer, Stenroos. 



a, the animal swimming. 



b, teeth of one jaw. 



1 9. Stepkanops tenellus, Bryce. 



a, dorsal view. 

 h, lateral view. 



20. Rotifer trisecatus, Weber. 



a, jaw. 



b, foot, from ventral side. 



c, foot, lateral view of penultimate segment 



and spurs. 



21. Philodina macrostyla, Ehr. Rostral tip, to 



show pairs of tactile seta 3 . 



22. Rotifer tardus, Ehr. Head, showing central 



setse. 



23. Rotifer vulgaris, Schrank. ' Head, showing 



central setse. 



24. Albertia intrusor, Gosse. 



a, dorsal view. 



b, lateral view. 



c, lateral view of young. 



d, dorsal view of young. 



Plate VI. 



25. Notommata pumila, n. sp., Rousselet. 



a, lateral view, drawn by F. R. Dixon- 



Nuttall. 



b, jaws, after drawing by Mr Rousselet. 



c, toes, dorsal view. 



26. Proales daphnicola, Thompson. 



a, lateral view, head applied to skin of worm. 



b, five examples adhering to one worm. 



c, jaws. 



27. Colurus tesselatus, Glascott. 



a, dorsal view. 



b, lateral view. 



28. Ploesoma, sp. ? 



a, probably P. triaeanthum (Bergendal). 



b, larger species, also with three dorsal 



spines, and two additional lateral 

 spines. 



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



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