64 THE FERTILIZATION E: 
and respiratory functions, and their curious modes of 
reproduction must be deferred until the next number. 
EXPLANATION OF PLATE 3. Fredericella regina Leidy. 
Fig. 1, 2, and 3. Colonies attached to pieces of bark. 
Fig. 4. Magnified view of one Polyzoén. D, brown aii the 
ectocyst; E, pellucid wall of the tube and cell, the endocyst; V, 
funiculus; M, M', M", upper branches of the mus cles, the retrac 
tors; N,N’, muscles of the fold, the retentor rs; F, a small infold- 
ing of the endocyst, the brachial collar; G, the pointed ruffle, or 
calyx; H, the threads, or tentacles 
Fig. 5. Outline of the interior of part of a young specimen. Same 
on as above, with the exception of B, the invaginated fold of — 
tube; Y, a very Parte polyzoon, a bud; K, ras aft at or œs- i 
sea WY, cilia surrounding the mouth; K”, valve opening — 
into the stomach, BS gue valve; K’!, Soak KM, intestinal 
valve partly open; K”, intestin Ta opening of intestine, the : A 
anus; I, disc, the lophophore; a the little flap, the epistome; I’, — 
the mouth; S, nerve-mass. 
Fig. 6. Side view of the top of a cell, with the tube and crown arawn 
heal letters same as before with the exception of A”; contracted 
fice of the cell; L, position of muscular band, the RTE. 
abov 
te 7. View of the same from ; 
Fig. 8. Front view, showing upper Ditches of the retractors, which 
are attached to the wall of the tube and to the disc, M” and M’. 
It is now universally accepted by botanists that there 
exist distinct sexes in the vegetable kingdom, and that na- 
