38 BIBLIOGRAPHY. 



a stolon attached on the ventral side, in the sixth inter-muscular 

 space. 



This stolon is simply the stalk by which each median bud 

 was primitively attached to the stolon of the first asexual form. 



From the stolon of the median buds of the second generation 

 buds are developed which grow into the sexual forms. 



The generations of Doliolum may be tabulated in the follow- 

 ing way. 



Sexual generation, 



I 

 ist asexual form with dorsal stolon, 



spoon-like forms developed as 2nd asexual forms developed as 



lateral buds (eventual history median buds with ventral stolon, 



unknown). | 



sexual generation. 



BIBLIOGRAPHY. 



(6) P. J. van Beneden. "Recherches s. I'Embryogenie, 1'Anat. et la Physiol. 

 des Ascidies simples." Mem. Acad. Roy. de Belgique, Tom. xx. 



(7) W. K. Brooks. "On the development of Salpa." Bull, of the Museum of 

 Comp. Anat. at Harvard College, Cambridge, Mass. 



(8) H. Fol. Etudes sur les Appendiculaires du detroit de Messine. Geneve et 

 Bale, 1872. 



(9) Ganin. "Neue Thatsachen a. d. Entwicklungsgeschichte d. Ascidien." 

 Zeit.f. wiss. Zool., Vol. xx. 1870. 



(10) C. Gegenbaur. "Ueber den Entwicklungscyclus von Doliolum nebst 

 Bemerkungen liber die Larven dieser Thiere." Zeit.f. wiss. Zool., Bd. vu. 1856. 



(11) A. Giard. "Etudes critiques des travaux d'embryogenie relatifs a la 

 parente des Vertebres et des Tuniciers." Archiv Zool. experiment. , Vol. I. 1872. 



(12) A. Giard. " Recherches sur les Synascidies. " Archiv Zool. exper., Vol. I. 

 1872. 



(13) O. Her twig. "Untersuchungen lib. d. Bau u. d. Entwicklung des Cellu- 

 lose-Mantels d. Tunicaten." Jenaische Zeitschrift, Bd. vii. 1873. 



(14) Th. H. Huxley. " Remarks upon Appendicularia and Doliolum. " Phil. 

 Trans., 1851. 



(15) Th. H.Huxley. " Observations on the anatomy and physiology of Salpa 

 and Pyrosoma." Phil. Trans., 1851. 



(16) Th. H. Huxley. "Anatomy and development of Pyrosoma." Linnean 

 Trans., 1860, Vol. xxill. 



(17) Keferstein u. Ehlers. Zoologische Beitrage, 1861. Doliolum. 



(18) A. Kowalevsky. "Entwicklungsgeschichte d. einfachen Ascidien." Mem. 

 Acad. Petersbourg, vu. serie, T. x. 1866. 



(19) A. Kowalevsky. "Beitrag /. Entwick. d. Tunicaten." Nachrichten d. 

 konigl. Gesell.zu Gottingen. 1868. 



(20) A. Kowalevsky. "Weitere Studien lib. d. Entwicklung d. einfachen As- 

 cidien." Archiv f. mikr. Anat., Vol. vu. 1871. 



