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PROFESSORS T. W. BRIDGE AND A. C. HADDON 
and posterior pillars of the anterior chamber ; semi-diagram- 
matic ; X 2. 
Fig. 20. Similar view of part of the dorsal wall of the anterior chamber ; 
X 4. 
Fig. 21. Weberian ossicles; ventral view, showing the attachment of the 
fibres of the inner stratum of the tunica externa to the left 
tripus, and also the radial fibres ; X 3. 
Fig. 22. Similar view of the attachment of the fibres of the outer stratum ; 
X 3. 
Fig. 23. Transverse section through the body in the region of the anterior 
chamber of the air-bladder ; semi-diagrammatic. 
Fig. 24. Diagrammatic representation of the relations of the auditory organ, 
the cavum sinus imparis, and the atrial cavities to the Weberian 
ossicles and air-bladder. 
Fig. 25. — Macrones aor. View of the posterior face of the skull with the post-tem- 
porals in situ. 
PLATE XIII. 
Fig. 26. — Pseudohagrus hracliysoma. Ventral view of the anterior vertebrte and the 
modified transverse processes. 
Fig. 27. — Rita crucigera. Ventral view of the cavity of the air-bladder. 
Fig. 28. — Acrochordonichthys jpleiirostigma. Base of the skull, and the modified 
anterior vertebrae ; ventral view ; X 3. 
Figs. 29 and 30. — Akysis variegatus. 
Fig. 29. Base of the skull, and the anterior vertebrae ; ventral view ; X 2. 
Fig. 30. Ventral view of the air-sacs i?i situ; X 3. 
Figs. 31-34. — Platystoma tigrinum. 
Fig. 31. Vertical longitudinal section through the anterior vertebrae ; ^ nat. 
size. 
Fig. 32. Ventral view of the left halves of the anterior vertebrae and their 
processes ; | nat. size. 
Fig. 33. Ventral view of the air-bladder in situ. 
Fig. 34. Interior of the air-bladder ; ventral view. 
PLATE XIV. 
Fig. 35 . — Piramutana piramuta. Ventral view of the base of the skull and of the 
anterior vertebrae ; the interior of the right half of the bladder is also 
shown ; X 2. 
Fig. 36. — Pimelodus ornatus. Interior of the air-bladder ; ventral view ; X 2. 
