On the Structure of the Excretory Organs of Amphioxus. Part 2.—The ...

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202 EDWIN S. GOODRICH. 10. Lankester, E. R., and Willey, A.—"The Development of the Atrial Chamber of Amphioxus," ' Quart. Joum. Micr. Sci.,' vol. 31, 1890. 11. MacBride, E. W.—" The Early Development of Ampliioxus," ibid., vol. 40, 1898. 12. Schneider, K. C —'Lehrbuch des Vergl. Histologie,' Jena, 1902. 13. Weiss, F. E.—" Excretory Tubules in Amphioxus," ' Quart. Journ. Micr. Sci.,' vol. 31, 1890. 14. Wijhe, J. W. van.—" Beitr. /,. Anat. des Kopfregion des Amphioxus," 'Petrns Camper,' vol. 1, 1901. 15. Willey, A.—" The Later Larval Development of Amphioxus," ' Quart. Journ. Micr. Sci.,' vol. 32, 1891. 16. Legros, R.—" Sur le dcvel. des fentes branchiales et des cansdicu1.es de Weiss-Boveri chez 1'Amphioxus," ' Anat. Anz.,' Bd. 34, 1909. Published anonymously. LIST OF REIMSRENCJS LETTERS. a. c. and a. ep. Atrial epithelium, ao. Aorta, b. Secondary gill-bar. b. c. Buccal cavity, b. ep. Epithelium of buccal cavity, br. Brain. br. c. Branchial epithelium. bv. Blood-vessel. ca. Cavity in which runs Hatschek's nephridium. c. ep. Coelomic epithelium, c. gl. Clubshaped gland. ch. Solenocyte chamber. cr. Cirrlius. c. w. Cut wall of nephridial canal, d. n. Dorsal nerve, e.
STRUCTURE OF THE EXCKJETORY ORGANS OJ? AMPHIOXUS. 203 EXPLANATION OF PLATES 11—16, illustrating Mr. Edwin S. Goodrich's paper "On the Structure of the Excretory Organs of Amphioxus." PLATE 11. PIG. 1.—Diagrammatic reconstruction of a left nepliriditim and the neighbouring blood-vessels, from a series of sections taken parallel to the gill-baa*. The solenocytes are not represented. Side view from the outside. Op. indicates the position of the nephridiopore on the opposite side. FIG. 2.—Similar reconstruction of a right nephridium, from a series of sections transverse to the gill-bar. In two places the ccelomic epithelium and the solenocytes are shown. TIG. 3.—Reconstruction of a portion of a left nephridium, the bloodvessels, and the top of the secondary gill-bar, seen from behind. FIG. 4.—Small portion of a section shaving off the wall of a nephridial canal, and showing the bases of the solenocyte tubes embedded in the cytoplasm. Cam. Z. 2 mm. ap. oil-imm., oc. S. PLATE 12. FIGS. 5 and 6.—Two consecutive sections, parallel to the gill-bar, through a nephridium, showing the solenocyte tubes passing through the thickness of the wall of the canal. Cam. Z. 2 mm. oc. 4. FIG. 7.—Drawing of the lower surface of the section of which the upper surface is represented in fig. 6. Cam. Z. 2 mm. ap oil-imm., oc. 4. FIG. 8.—Section across the anterior limb of a nephridium, showing the coelomic epithelium passing over the outer surface of the canal. FIG. 9.—Similar section showing solenocyte tubes piercing the wall of the canal. Cain. Z. 2 mm. ap. oil-imm., oc. 4. FIG. 10.—Section parallel to a gill-bar, cutting the wall of a diverticulum of the nephridial canal (at tb.). Cam. Z. 2 mm. ap. oil-imm., oc. 4. FIG. 11.—Diagrammatic view of a small portion of the wall of the diverticulum in the same section, showing the bases of the solenocyte tubes.
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On the Structure of the Excretory Organs of Amphioxus. Part 2.—The ...

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