. A course of instruction in zootomy (vertebrata). Anatomy, Comparative. THE COD. 123 vestibule (r) and of the three semicircular canals : the latter have the usual arrangement; the anterior () and posterior () canals have their adjacent limbs confluent, so that the two canals open by three apertures into the vestibule ; the horizontal canal () lies entirely to the outer side of the vestibule, into which it opens by two separate aper- tures, and the ampullx (a) are situated at the actual extremities of the canals, those of the anterior and horizontal canals being anterior, that
. A course of instruction in zootomy (vertebrata). Anatomy, Comparative. THE COD. 123 vestibule (r) and of the three semicircular canals : the latter have the usual arrangement; the anterior () and posterior () canals have their adjacent limbs confluent, so that the two canals open by three apertures into the vestibule ; the horizontal canal () lies entirely to the outer side of the vestibule, into which it opens by two separate aper- tures, and the ampullx (a) are situated at the actual extremities of the canals, those of the anterior and horizontal canals being anterior, that of the posterior canal posterior. 183. The two otoliths, one large (s) and shaped something like a shell (sagitta), and the other very small (at) (asteriscus) lying in a small diverticulum of the vestibule, just beneath the ampulla of the posterior 8 FIG. 33.—Gadus morrhua. The organ of hearing. (From a sketch by Mr. G. B. Howes.) z/, vestibule: , anterior, , posterior, and h , horizontal, semicircular canals: a,a,a, ampullae: s, sagitta : as, asteriscus. XXXVI. Examine the brain : if a fresh fish is used for the purpose and no spirit-specimen is available, the verification of the characters of the ventral surface must be left until the origins of the nerves have been made out, when the brain may be removed : note the following :— 184. The medulla oblongata (Fig. 34, \ or hind- most division of the brain, continuous with, and of scarcely greater diameter than, the spinal Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Parker, T. Jeffery (Thomas Jeffery), 1850-1897. London, Macmillan
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectanatomy, bookyear1884
