[462]

See also Sörensen, Journ. Anat. and Phys. xxix. 1895, p. 399; and Bridge, Journ. Linn. Soc. xxvii. 1900, p. 531.

[463]

Bridge and Haddon, op. cit. p. 261.

[464]

Id. Proc. Roy. Soc. lii. 1892, p. 139.

[465]

Kupffer, Stud. vergl. Entwickl. d. Kopfes d. Kraniaten, iii. 1895, p. 6.

[466]

In Bdellostoma the olfactory organ arises as a pair of outgrowths from the pituitary involution (Bashford Dean, Kupffer's Festschrift, Jena, 1899, p. 269).