30 
PLATE X. 
Reproductive cysts (continued) : 1, la, first stage ; 2, 3, 4, 26, bi-segrnentation or di- 
vision into two parts; 5, 6, 7, 8,9, segmentation into four parts; 10,11,12,13,14,15, 
16, 17, 18, segmentation into eight parts— greatly enlarged. (Original.) 
PLATE XL 
Developed or free Anguiilulse within the reproductive cysts: 1, free Anguillula 
within cyst not yet broken ; 2, 3, 7, cyst broken ; 4, 4a, empty shell of cyst from which 
Anguiilulse have emerged ; 5, young worm casting skin ; 6, empty skin cast by young 
worm — greatly enlarged. (Original.) 
PLATE XII. 
Growth of Anguiilulse : 1," cast skin of young worm ; 2, 3, 4, 5, 6, 7, 8, worms showing 
bluntness at one end, with fissure having a circular, hinge like termination at A, and 
granular masses of cells within — greatly enlarged. (Original.) 
PLATE XIII. 
Growth of Anguiilulse (continued): 1,2, 3, worms showing masses of fine cells irregu- 
larly arranged within, and fissure at bltfnt end with circular, hinge-like termination 
at A — greatly enlarged. (Original.) 
PLATE XIV. 
Growth of Anguiilulse and changes within the female : 1, 2, female worms showing 
granular masses within; 3, 4, 5, 6, changes in shape in the female, preceded by for- 
mation in upper and lower thirds of body of dark masses of cells, A, B, C, which 
eventually unite — greatly enlarged. (Original.) 
PLATE XV. 
Changes within female Anguiilulse (continued) : 1, 2, 3, enlargements in shape of 
the female, with formation of masses of cells at A — greatly enlarged. (Original.) 
PLATE XVI. 
Changes in form of female Anguiilulse: 1-15, outlines showing changes in form, 
from leaving the reproductive cyst until the female is herself filled with cysts, also 
showing changes in the form of the head and disappearance of the tail — greatly en- 
larged. (Original.) 
PLATE XVII. 
Changes in form of female Anguilluhe (continued) : 1-9, outlines of changes in form 
of body and head, with the disappearance of the tail — greatly enlarged. (Original.) 
PLATE XVIII. 
Gravid female Anguillula, showing contracted head and neck as in some females, 
and the arrangement of cysts in the uterus — greatly enlarged. (Original.) 
PLATE XIX. 
Arrangement of cysts in uterus of female Anguillula and expulsion of young worms 
through fissure in the head — greatly enlarged. (Original.) 
