Davenport. — Budding in Bryozoa. 
PLATE IV. 
ABBREVIATIONS. 
An. Anal side of polypide. i. Inner layer of bud. 
an, Anus. loph. Lophophore. 
atr. Atrium. ms’drm. Mesoderm. 
can. cre. Ring canal. mu. Muscle fibre in funiculus. 
ec’drm. Ectoderm. n’ Circumæsophageal nerve. 
ex. Outer layer of bud. æ, (Esophagus. 
Jun. inf. Inferior funiculus. Or. Oral side of polypide. 
fun. sup. Superior funiculus. rt. Rectum. 
ga. Stomach. vac. Vacuole. 
gn. Ganglion. vlv, er. Cardiac valve. 
All figures from preparations of Paludicella Ehrenbergii. 
Fig. 30. Cross section of polypide bud of stage of Figure 24, Plate III. The posi- 
tion is indicated by the line 80, Figure 24. X 410. 
Figs. 81-34. Four cross sections of a branch through a young polypide, some- 
what younger than that of Figure 25. Figure 81 is nearer the anal, 
Figure 34 nearer the oral surface. In Figure 34 that part only of the 
section of the polypide which lies near the body wall is represented. 
x 410. 
Fig. 35. Cross section of branch through polypide of age of Figure 25. To show 
origin of tentacles and ring canal. X 410. 
Fig. 36. Sagittal section of young polypide at period of closure of ganglion, gn. 
x 410. 
Fig. 36°. Bit of same polypide a few sections to one side of plane of Figure 36, 
showing origin of inferior funiculus. X 410. 
Fig. 37. From cross section of branch showing early stage in development of the 
bud. X 410. 
Fig. 38. From a sagittal section of nearly adult polypide, showing the two funiculi 
and their muscles. X 410. 
Figs. 39 and 40. Two neighboring sections parallel to the body wall through a bud 
of the stage of Figure 23. Figure 40 lies three sections below Fig- 
ure 39. Figure 39 shows the atrial cavity, formed as yet only on the 
anal side. Figure 40 shows the beginning of formation of the ali- 
mentary tract at the anal end. Note the vacuolated condition of the 
mesoderm. X 410. 
Fig. 41. Polypide of about the stage of Figure 25 looked at en face. The anal 
tentacles, being turned under, do not appear. To show compressed 
condition of polypide, and alternating position of tentacles, Cf. 
Figure 77, Plate IX. X 820. 
