This mite swarms its body and invades its respiratory cavity.
2.
The respiratory cavity open throughout the whole length of the mantle, bearing on its right margin a long and narrow branchia.
3.
The epipodium is fringed, with a more prominent fimbriated lobe behind the left tentacle, and on the right there is a slightly projecting fold or gutter leading to the respiratory cavity.
4.
Generally, the larvae of " Gedoelstica " and " Oestrus " occur in the nasal passages and respiratory cavities of the blue wildebeest, and sometimes migrate to the brain.
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