"Beiträge zur Anatomie der Phoronis," Inaug. Dissert. Prag. 1889, and Zeitschr. wiss. Zool. vol. li. 1891, p. 480.

[493]

P. Linn. Soc. N. S. Wales, 1st ser. vol. vii. 1883, p. 606; and 2nd ser. vol. vii. 1893, p. 340.

[494]

Quart. J. Micr. Sci. vol. xxx. 1890, p. 125.

[495]

Challenger Reports, vol. xxvii. 1888; and Proc. Roy. Soc. Edinb. vol. xi. 1882, p. 211.

[496]

Proc. Roy. Soc. London, vol. xxxiv. 1883, p. 371.

[497]