an. 
el, rtl. 
cta. 
cta’ 
ec'drm. 
ex. 
gm. 
gn. 
Fig. 52. 
Fig. 58. 
Fig. 54. 
Fig. 55. 
Fig. 56. 
Fig. 57. 
Fig. 58. 
Fig. 59. 
Fig. 68. 
Davenport. — Budding in Bryozoa. 
can. cre. 
cev. pyd. 
PLATE VI. 
ABBREVIATIONS. 
Anus. i: Inner layer of bud. 
Ring canal, kmp’drm. Kamptoderm. 
Neck of the polypide. la. comn. Communication plate. 
Reticulated cells. ms’drm. Mesoderm. 
Normal cuticula of adult mu. par. Parietal muscles. 
body wall. mu. pyr. Pyramidal muscles. 
Cuticula secreted by tip. nw Circumosophageal nerve. 
Ectoderm. æ. Güsophagus. 
Outer layer of bud. tts Rectum. 
Bud. vac. Vacuole. 
ganglion. 
All figures from preparations of Paludicella Ehrenbergii. 
Cross section of a branch through a polypide slightly older than that 
shown in Figure 36, The section passes through the brain and whole 
extent of the ring canal, together with its opening into the coclom. 
x 685. 
Next section below Figure 52 of same series ; showing the beginning of the 
circumosophageal nerve ring. X 635. 
Shows connection of mesodermal cells of body wall, ms’drm, with those 
of the outer layer of bud, ex. X 1030. 
Origin of the secondary parietal muscle cells from mesoderm of body 
wall. X 685. 
Histological conditions of the budding regions. The cells have large nu- 
clei, the mesodermal cells are vacuolated and rapidly dividing; the 
cells of the bud are densely granular. Zeiss, 7g oil immersion, Oc. 1. 
x 1070. 
Normal vacuolated cell, full of food particles. X 1030. 
Longitudinal section of young lateral branch, showing highly reticulated 
character of mesoderm, and nearly complete ‚ormation of communi- 
cation plate. X 410. 
Reticulated cell, showing one of the pseudopodia-like processes which 
frequently appear on them, projecting into the calom. x 1030. 
Figs. 60-62. Three successive sections from a series across the tentacles of a pol- 
ypide which has 15 tentacles, and is of about the stage of Figure 86. 
The odd tentacle (*) is shorter than the others, and lies opposite the 
rectum, rt. X 295. 
Cross section of branch through neck of polypide of about the age of Fig- 
ure 36. Shows also the young pyramidal muscles. X 410. 
