. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. ORGAN OF HEARING IN FISHES. 34,5 side by a small orifice with of the atlas, close to the foramen magnum, which ' atria ' are supported ex- ternally by the ossicles I aud m, and, by means of the large ossicle o, arc brought into commnnica- tion with the fore part of the air-bladder, j). Both the atria and common sinus are filled by the endolymph, and from the fore part of the sinus a ' canalis furcatus,' ib. /, is produced, the blind ends of which penetrate the alisphenoids. In the grovelling Loach ( Cobitis barhatula), t
. On the anatomy of vertebrates. Vertebrates; Anatomy, Comparative; 1866. ORGAN OF HEARING IN FISHES. 34,5 side by a small orifice with of the atlas, close to the foramen magnum, which ' atria ' are supported ex- ternally by the ossicles I aud m, and, by means of the large ossicle o, arc brought into commnnica- tion with the fore part of the air-bladder, j). Both the atria and common sinus are filled by the endolymph, and from the fore part of the sinus a ' canalis furcatus,' ib. /, is produced, the blind ends of which penetrate the alisphenoids. In the grovelling Loach ( Cobitis barhatula), the air-bladder would seem to exist chiefly in subserviency to the organ of hearing. It is so small as to be wholly included within the singularly modified parajjophyses of the se- cond and third cervical vertebras, which are ex- panded and coalesced so as to form a large ' bulla ossea ' beneath their cen- trums.' The three ossicles on each side, which bring the air-bladder into com- munication with the' atria' of the labyrinth, are also concealed by the fore part of the parapophysial bul- lae : it is plain, therefore, that they are not dis- memberments of those two subsphcrical ' atria,' on the body 229. Organ of Heariug m situ ^\ th i i 11 Uder and l ssides, Carp. Lwm XXXIX. i. p. 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 Owen, Richard, 1804-1892; Cornell University. College of Veterinary Medicine. Flower-Sprecher Veterinary Library. fmo. London, Longmans, Green
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