REFERENCES. 307 



104 ZlEGLER, H. Ernst. Der Ursprung der mesenckymatischeti 

 Gewebe beiden Selachiern. Archiv f. Mikr. Anat. XXXII. 1888. 

 pp. 378-400. One plate. 



Independent discovery of sclerotome-diverticulum. (See Rabl.) 



IV. 



ASCIDIANS. 



For bibliography relating to the Ascidians, see Professor W. A. Herd- 

 man's Reports on the Tunicata collected during the " Challenger" 

 expedition — Parts I. -III. 1882-88; and also Korschelt und 

 Heider, " Lerhbuch der vergleichendeu Entwicklungsgeschichte 

 der wirbellosen Thiere." Heft III. Jena, 1893. 



V. 

 PROTOCHORDATES, ETC. 



105 Ayers, Howard. Concerning Vertebrate Cephalogenesis . 

 Jour. Morph. IV. 1890-91. pp. 221-245. 



106 Bateson, William. Memoirs on tlie Development of Balano- 

 glossus. Quarterly Jour. Micro. Sc. Vols. XXIV. -XXVI. 



1884-86. 



107 Brooks, W. K. The Systematic Affinity of Salpa in its 

 Relation to the Conditions of Primitive Pelagic Life ; the Phytogeny 

 of the Tunicata ; and the Ancestry of the Chordata. Part II. of 

 Monograph of the Genus Salpa. Johns Hopkins University. 

 Baltimore, 1893. 



108 Burckhardt, Rudolf. Die Homologieen des Zwischenhirn- 

 daches iind ihre Bedeutung fur die Morphologie des Hirns bei 

 niederen Vertebraten. Anat. Anz. IX. 1894. pp. 152-155 and 

 320-324. 



Relates to neuropore of craniate Vertebrates. Author calls the 

 lobas olfactorius impar of Kupfifer, the recessus neuroporicus . 



109 Clapp, Cornelia M. Some Points in the Development of the 

 Toad-fish {Batraclms Tail). Jour. Morph. V. 1891. pp. 494- 

 501. 



Observations on the double origin of mouth, made in 1S89, not 

 published in this paper. 

 no Davidoff, M. von. Ueber deti " Canalis neurentericus 

 anterior bei den Ascidien."' Anat. Anz. Vlll. 1893. pp. 301-303. 



