D. BRYCE ON MACROTRACHELOUS CALLIDIN^. 455 



7. L. Plate. — tJber die Rotatorienfauna des Bottnischen Meer- 

 biisens. Zeitscb. fiir Wiss. Zool., Vol. xlix., 1889. 



8. P. G. Thompson. — Moss- haunting Rotifers. Science Gossip, 

 Vol. xxyiii., p. 56, 1892. 



9. Carl Zelinka. — Studien iiber Radertliiere, iii., Zur Entwick- 

 elungsgescbichte der Radeithiere nebst Bemerkungen iiber ihre 

 Anatomic und Biologic. Zeits. fiir Wiss. Zool., Vol. liii., 1891. 



Explanation of Plates. 



Plate XKIII. 



Fig. 1. Callidina alpium, dorsal, x 480. 

 „ 2. Callidina fusca, ventral, x 480. 

 2a. Head and neck, lateral. 

 2b. Foot, dorsal. 

 2c. Foot, lateral. 

 2d. Mastax. x 800. 

 „ 3. Callidina eremitaj dorsaX. x640. 



3«. Rami under pressure, the normally inrolled edges 

 forced back. x 800. 



Plate XXIV. 



Fig. 4. Callidina plena ^ dorsal, x 400. 



4a. Rostrum and head extended, ventral. x 800. 

 „ 5. Callidina hahita^ dorsal. X 400. 



5a. Rami under pressure, the normally inrolled edges 

 forced back. x 800. 

 „ 6. Callidina angiista, ventral, x 480. 



