Beddard, "Notes upon the Tadpole of Xenopus laevis," P.Z.S., 1894, p. tot; S.
Engler, Entwickelungsgeschichte der Pflanzenwelt; also Beddard, Zoogeography (Cambridge, 1895); and Sclater, The Geography of Mammals (London, 1899).
Beddard) the funnels of the pronephridia disappear except in the genital segments, where they seem to be actually converted into the genital funnels.
As an example of the former it has been shown (Beddard) that a large median sac in Lybiodrilus is at first freely open to the coelom, that it later becomes shut off from the same, that it then acquires an external orifice, and, finally, that it encloses the ovary or ovaries, between which and the exterior a passage is thus effected.
Beddard, A Monograph of the Oligochaeta (Oxford, 1895), also Quart.
Beddard, Proc. Zool.
Cymothoarum of Sch16dte and Meinert (1879-1883); "Challenger" Report, Beddard (1884-1886); Cirolanidae, H.