PLATE XXXVIa. 
a. (Esophageal region. 
&. Cuticle. 
hV. Small intestine. 
c. Hypoderm. 
cd. Vascular mesentery. 
d. Circular muscular coat. 
The Lettering is the same in all the Figures. 
e. Dorsal longitudinal muscles. 
/. Ventral longitudinal muscles. 
g. Oblique muscles. 
lih. Reproductive glands. 
z. Meshes containing yellowish masses like oil in Phyllo- 
chmtopterxis. 
Fig. 1. Body-wall of Travisia Jcerguelensis in vertical transverse section, . x 90. 
Fig. 2. View of the surface of the skin of the foregoing, . . . x 90. 
Fig. 3. Transverse section of the anterior third in PhyllochoBtopterus 
claparedii. z, z, peculiar secretion, probably connected with 
phosphorescence, . . . . . . x 40. 
Fig. 4. Trophoniphila hradii, a parasitic Crustacean from the oral region 
of Trophonia wyvillei, ..... Enlarged. 
Fig. 5. Alimentary apparatus of Trophonia wyvillei, from the ventral 
aspect, a, oesophageal or firm region of the alimentary canal ; 
h, h', small intestine ; c, c', vascular mesentery between great 
blood-vessel and gut ; d, large intestine ; e, rectum ; f, anus ; 
g, proboscis (1) ; h, h, reproductive glands, . . . Enlarged. 
Fig. 6. .Refractive globular bodies prevalent over the vessels of the intestine, x 250. 
Fig. 7. Fimbriated end of proboscidian region {Trophonia wyvillei), where 
fixed to the intestine, ..... Enlarged. 
