330 ARTHUR WILLET. 



9. KtrPFFER, C. von. — "Die Entwickelung von Petromyzon planeri," 

 ' Arch. f. raikr. Anat.,' xxxv, 1890. 



10. KuPFFER, C. von. — "Mittheilungen zurEntw. des Kopfesbei Acipenser 



sturio," ' S. B. Ges. fiir Morph. und Physiol, zu Miinchen,' Nov, 

 and Dec, 1891, pp. 107—123. 



11. Lahille, F. — ' Eech. sur les Tuniciers des cotes de France,' Toulouse, 



1890, p. 173. 



12. Metcalp, M. M.— "Anat. and Dev, of Eyes and Subneural Gland in 



Salpa," 'Johns Hopkins Univ. Circulars,' vol. xi. No. 97, April, 1892. 



13. Metcalp, M. M.— " On the Eyes, Subneural Gland, and Central Nervous 



System in Salpa," 'Zool. Anz.,' xvi, 1893, pp. 6—10. 



14. Salenskt, W. — " Ueber die embryonale Entwickelung der Salpen," ' Zeit. 



f. wiss. Zool.,' xxvii, 1876, 



15. Salensky, W. — "Ueber die Knospung der Salpen," 'Morph. Jahrb,,' 



iii, 1877. 



16. Schimketvitsch, W. — " Ueber die morphologische Bedeutung der Organ- 



systeme der Enteropneusten," 'Anat. Anz.,' v, 1890, pp. 29 — 32. 



17. Scott, W. B. — " Notes on the Development of Petromyzon," ' Journ. 



Morph.,' i, 1887, see pp. 263—271. 



18. Sedgwick, A. — "On the Origin of Metameric Segmentation," &c., 



' Quart. Journ. Micr. Sci.,' xxiv, 1884, pp. 43—82. 



19. Sedgwick, A. — " The Original Function of the Canal of the Central 



Nervous System of Vertebrata," ' Studies from Morph. Lab., Cam- 

 bridge,' ii, 1884, pp. 160—164. 



20. Uljanin, B. — " Die Arten der Gattung Doliolum," ' Fauna und Flora 



des Golfes von Neapel,' x, 1884. 



21. Van Wijhe, J. W. — " Ueber den vordereu Neuroporus und die phylo- 



geuetische Function des Canalis neurentericus der Wirbelthiere," 

 ' Zool. Anz.,' vii, 1884, pp. 683—687. 



22. WiiLEY, A. — " On the Development of the Hypophysis in the Ascidians," 



* Zool. Anz.,' XV, 1892, pp. 332—334. 



