Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
36. 
37, 
. 38. 
. 38a. Oral hooks, X 225. 
. Segmenting ovum, X 225. 
. Another showing more advanced stage of segmentation, XK 22d. 
. Oral hooks, dorsal view, X i80. 
2. Cirrus and bursa, x 60. 
. Pharnyx, X 180. 
. Cervical spines, X 225. 
50. 
51. 
52. 
53. 
AVIAN ENTOZOA—LINTON. 
Distomum flecum, sp. nov., from Cidemia americana. 
Lateral view, xX 15. 
Ventral view of head of saine, X 33. 
Dorsal view of body, ventral of head, compressed, X 3U. 
Dibothrium cordiceps Leidy., from Larus californicus. 
. Lateral view of head of immature specimen, X 27. 
Dibothrium exile, sp. nov., from Larus californicus. 
. Marginal view of head, x 30. 
. Anterior segments, lateral view, X 14. 
. Posterior segments, lateral view, X 14. 
Epision plicatus gen. et sp. noy., from Gidemia americana. 
. Lateral view of head and anterior part of body of smallest specimen, x 12. 
Lateral view of head of largest specimen, X 15. 
Portion of head near apex, X 54. 
Lateral view of margin of head, X 225. 
Posterior end of largest specimen, lateral view, X 12. 
PuaTeE VII. 
Fragments of Tenia from Colymbus sp. and Larus sp., T. capilella Rud. (?) Colymbus sp. 
Fig. 
Fig. 
Fig. 
Fig. § 
Fig. | 
Fig. ! 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
5 
Fig. 
65. 
66. 
. Posterior segments, lateral view, X 12. 
Marginal view of same, X 12. 
T. fusus Krabbe (?) from Larus sp. 
. Posterior segments, lateral view, X 12 
T. larina Krabbe ? from Larus sp. 
. Fragments, X 12: a, anterior; b, postmedian, and ec, posterior segments. 
. Ovuin of same, X 345. 
Tenia porosa Rudolphi, from Larus californicus. 
. Head with proboscis extended, lateral view, x 56. 
. Anterior segments of same, X 12. 
. Antero-median segments, X 12. The genital apertures are not quite uni- 
formly alternate. 
. Posterior segments, X 12. 
3. Hooks, X 360. 
. Ovum with embryo, from life, x 180: a, external pellicle; b, finely granu- 
lar food-stuff with a few globular masses of varying size; d, finely granu- 
lar and homogeneous material assuming a flowing appearance at e; f, 
granulo-nuclear patch; g, vacuolar granular area; h, granular area with 
large vacuolar spaces; ¢c, embryo with four of the six hooks showing. 
External pellicle of ovum, highly magnified, from life. 
Hooks of a single embryo, in position, x 345. 
