PLATE LXXVII. 



FIG. 



1, 2. Cylindrcecium dilatatum, p. 536. See 

 Plate LXXIX. 



3, 3 a. Cylindrcecium giganteum, p. 535. 



4. , showing the ova collected at the top of 



the zocecium previous to escape. 



5, 5 «. Anguinella palmata, p. 539. 



6. Avenella ruscA^ p. 527. After Dalyell. 



7. . After Wyville Thomson. 



