AND TWELVE NEW 
4a, dorsal view, feeding. 
4b, ventral view, creeping. 
4c, back of head. 
4d, side of rostrum. 
5a, dorsal view, showing stippling. 
5b, dorsal view, feeding. 
5e, antenna. 
6a, dorsal view, creeping, showing papille. 
6b, ventral view, creeping, showing internal 
structure. 
7a, dorsal view, creeping. 
7b, ventral view, feeding. 
7c, side of rostrum. 
7d, section of neck. 
8a, dorsal view, creeping 
8d, side of rostrum. 
8c, front of rostrum. 
8d, jaws. 
9a, dorsal view, feeding. 
9b, front of rostrum. 
9c, Jaw. 
10a, dorsal view, feeding, 
10), ventral view, creeping. 
10¢, side of head. 
10d, jaw. 
SPECIES OF ROTIFERA OF THE ORDER BDELLOIDA. 
Puate IV. 
4, Philodina humerosa, u. sp. 
4e, section of neck. 
4f, toes. 
4q, Jaws. 
5. Callidina pulchra, n. sp. 
5e, spurs. 
5d, side of foot. 
| dof, Jaws. 
6. Callidina crenata, n. sp. 
6c, section of neck. 
6d, jaws. 
PuatEe V. 
7. Callidina muricata, n. sp. 
Te, side of antenna. 
Tf, jaws. 
7g, side of foot. 
7h, spurs and toes. 
8. Callidina erucicornis, n. sp. 
8e, spurs crossed. 
8, side of foot. 
8y, spurs and toes. 
Prate VI. 
9. Callidina inerassata, n. sp. 
| 9d, side of antenna. 
Ye, spurs and dise. 
9f, section of neck. 
10. Callidina armata, n. sp. 
385 
10e, section of head, showing tooth-like processes. 
10f, dorsal view of foot, showing fold and glands. 
10g, side of foot. 
10h, spurs and disc. 
