THE DEVELOPMENT OF ASTERINA GIBBOSA. 399 
I hope in a future paper to be able to show that the 
Trochophore larva is also related, though much more distantly, 
to 
the Dipleurula. 
Zoological Laboratory, 
March 8th, 1895. Cambridge. 
List oF WoRKS REFERRED TO IN THIS MeEmork. 
. Bury, H.—‘The Early Stages in the Development of Antedon 
rosacea,” ‘ Phil. Trans. Roy. Soc.,’ 1888. 
. Bury, H.—‘‘ Studies in the Embryology of Echinoderms,” ‘ Quart. 
Journ. Micr. Sci.,’? 1889. 
x 
. Cuinot, L.—“ Contributions & lEtude anatomique des Asterides,” 
‘Arch, pour Zool. Exp.,’ 2me series, tome v bis. 
. Cusvor, L.— Etudes morphologiques sur les Echinoderms,” ‘ Arch. de 
Biol.,’ tome xi, fascicles 1 and 2. 
. Fretp.—* The Larva of Asterias,” ‘ Quart. Journ. Mier. Sci.,’ 1892. 
. Garstanc, W.—“On some Bipinnarie from the English Channel,” 
* Quart. Journ. Mier. Sci.,’? 1894. 
. Hamann, Orro v.—‘ Die Wandernden Urkeimzellen und ihre Reifungs- 
statte bei den Echinodermen,” ‘ Zeitsch. fiir wiss. Zool.,’ 1880. 
. Hamany, Orro v.—‘ Beitrage zur Histologie der Hchinodermen,’ 4 
Hefte, Jena, 1889. 
. Lerrotpt, H.— Das angebliche Excretiensorgan der Seeigel,” ‘ Zeitsch. 
fir wiss. Zool.,’ 1893: 
. Lupwic, H.—*‘ Beitrage zur Anatomie der Asteriden,”’ ‘Zeitsch. fiir 
wiss. Zool.’ 
. Lupwic, H.—‘“‘ Neue Beitrage zur Anatomie der Ophiuriden,” ‘ Zeitsch. 
fiir wiss. Zool.,’ Bd. xxxiv, 1880. 
. Lupwie, H.—“ Entwickelungsgeschichte der Asterina gibbosa, 
Forbes,” ‘ Zeitsch. fiir wiss. Zool.,’ Bd. exxxvii. 
. Lupwic, H.—‘ Bronn’s Thierreich,’ new edition, article “ Echino- 
dermata.” 
. MacBripz, E. W.—“ The Development of the Genital Organs, &., in 
Amphiura squamata,” ‘ Quart. Journ. Micr. Sci.,’ 1892. 
. MacBripe, EK. W.—‘ The Organogeny of Asterina gibbosa,” ‘Proce. 
Roy. Soc. London,’ vol. liv, 1898. 
