The organs in Chauliodus are spherical or nearly spherical bodies invested in a special tunic. The larger of them, which alone can have any relation to vision, are covered with pigment except on their outer surface. The interior is filled with two masses, named by Leuckart the lens and vitreous humour. According to Leydig each of them is cellular and receives a nerve, the ultimate destination of which has not however been made out. According to Ussow the anterior mass is structureless, but serves to support a lens, placed in the centre of the eye, and formed of a series of crystalline cones prolonged into fibres, which in the posterior part of the eye diverge and terminate by uniting with the processes of multipolar cells, placed near the pigmented sheath. These cells, together with the fibres of the crystalline cones which pass to them, are held by Ussow to constitute a retina.
Eye of the Mollusca.
(362) N. Bobretzky. “Observations on the development of the Cephalopoda” (Russian). Nachrichten d. kaiserlichen Gesell. d. Freunde der Naturwiss. Anthropolog. Ethnogr. bei d. Universität Moskau.
(363) H. Grenacher. “Zur Entwicklungsgeschichte d. Cephalopoden.” Zeit. f. wiss. Zool., Bd. XXIV. 1874.
(364) V. Hensen. “Ueber d. Auge einiger Cephalopoden.” Zeit. f. wiss. Zool., Vol. XV. 1865.
(365) E. R. Lankester. “Observations on the development of the Cephalopoda.” Quart. J. of Micr. Science, Vol. XV. 1875.
(366) C. Semper. Ueber Sehorgane von Typus d. Wirbelthieraugen. Wiesbaden, 1877.
Eye of the Arthropoda.
(367) N. Bobretzky. Development of Astacus and Palaemon. Kiew, 1873.
(368) A. Dohrn. “Untersuchungen üb. Bau u. Entwicklung d. Arthropoden. Palinurus und Scyllarus.” Zeit. f. wiss. Zool., Bd. XX. 1870, p. 264 et seq.
(369) E. Claparède. “Morphologie d. zusammengesetzten Auges bei den Arthropoden.” Zeit. f. wiss. Zool., Bd. X. 1860.
(370) H. Grenacher. Untersuchungen üb. d. Sehorgane d. Arthropoden. Göttingen, 1879.
Vertebrate Eye.
(371) J. Arnold. Beiträge zur Entwicklungsgeschichte des Auges. Heidelberg, 1874.
(372) Babuchin. “Beiträge zur Entwicklungsgeschichte des Auges.” Würzburger naturwissenschaftliche Zeitschrift, Bd. 8.
(373) L. Kessler. Zur Entwicklung d. Auges d. Wirbelthiere. Leipzig, 1877.
(374) N. Lieberkühn. Ueber das Auge des Wirbelthierembryo. Cassel, 1872.
(375) N. Lieberkühn. “Beiträge z. Anat. d. embryonalen Auges.” Archiv f. Anat. und Phys., 1879.
(376) L. Löwe. “Beiträge zur Anatomie des Auges” and “Die Histogenese der Retina.” Archiv f. mikr. Anat., Vol. XV. 1878.
(377) V. Mihalkowics. “Untersuchungen über den Kamm des Vogelauges.” Archiv f. mikr. Anat., Vol. IX. 1873.
(378) W. Müller. “Ueber die Stammesentwickelung des Schorgans der Wirbelthiere.” Festgabe Carl Ludwig. Leipzig, 1874.
(379) S. L. Schenk. “Zur Entwickelungsgeschichte des Auges der Fische.” Wiener Sitzungsberichte, Bd. LV. 1867.
Accessory organs of the Vertebrate Eye.
(380) G. Born. “Die Nasenhöhlen u. d. Thränennasengang d. Amphibien.” Morphologisches Jahrbuch, Bd. II. 1876.
(381) G. Born. “Die Nasenhöhlen u. d. Thränennasengang d. amnioten Wirbelthiere. I. Lacertilia. II. Aves.” Morphologisches Jahrbuch, Bd. V. 1879.
Eye of the Tunicata.