ON THE ANATOMY OF FISHES. 
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Figs. 37, 38. — Pimelodus sapo. 
Fig. 37. Ventral view of the right half of the bladder and the left osseous 
capsule ; the ventral part of the right capsule has been removed ; 
X 11. 
Fig. 38. The left tripus ; ventral view ; X 3. 
Figs. 39-41. — Pimelodus pulcher. 
Fig. 39. Base of the skull, the right air-sac, the left osseous capsule, and 
the modified anterior vertehrse ; X 2. 
Fig. 40. Ventral view of the interior of the two air-sacs ; X 2. 
Fig. 41. Ventral view of the left tripus ; X 2. 
Figs. 42-44. — Auchenoglanis hiscutatus. 
Fig. 42. Ventral view of the right halves of the anterior vertebrfe and their 
processes. 
Fig. 43. The left tripus ; ventral view. 
Fig. 44. Ventral view of the interior of the air-bladder. 
Figs. 45-49. — Arius pidada. 
Fig. 45. Lateral view of the hinder part of the skull and the anterior vertebrm. 
PLATE XV. 
Fig. 4G. Vertical longitudinal section of the hinder part of the skull and the 
anterior vertebrm. 
Fig. 47. The base of the skull and the anterior vertebrae ; ventral view. 
Fig. 48. Interior of the air-bladder ; ventral view. 
Fig. 49. The Weberian ossicles. 
Fig. 50. — Ketengus typus. Lateral view of the interior of the air-bladder, the right 
outer wall having been removed. 
Fig. 51. — Osteogeniosus Valenciennesii. Ventral view of the interior of the air-bladder. 
Fig. 52. — Batrachocephalus mino. Interior of the air-bladder ; ventral view. 
Figs. 53, 54. — Bagarius Yarrellii. 
Fig. 53. The base of the skull, the anterior vertebrae, the right aii'-sac, and 
the left osseous capsule. The stem and ascending process of the 
post temporal have been removed ; X 2. 
Fig. 54. The left tripus ; X 2. 
PLATE XVI. 
Figs. 55-58. — Glyptosternum platypogon. 
Fig. 55. The base of the skull, the anterior vertebrae, and the bony capsules 
for the air-sacs ; ventral view ; X 2. 
Fig. 5G. Lateral view of the hinder part of the skull, the pectoral girdle, and 
the neural spines of the anterior vertebrae ; X 2. 
