DAVENPORT, — Budding in Bryozoa, 
PLATE I. 
ABBREVIATIONS. 
cev. pyd. Neck of polypide. gn. Ganglion. 
cla. Normal cuticula of adult h Inner layer of bud. 
body wall. kmp’drm. Kamptoderm. 
eta. Cuticula secreted by tip. ms’drm.  Mesoderm. 
ec’drm.  Ectoderm. mu. pyr. Pyramidal muscles. 
ex. Outer layer of bud. a. CEsophagus (pharynx). 
ga. Stomach. rt. Rectum. 
gm. Bud. ta. Tentacle. 
All figures are of Paludicella Ehrenbergü. 
Fig. 1. Stock of Paludicella Ehrenbergii, viewed as an opaque object. X 4.5. 
Fig. 2. Diagram representing the interrelations of individuals in stock shown in 
Figure 1. A-H are individuals of the ancestral (median) branch ; 
a, b,c, etc., lateral branches given off from the ancestral branch to the 
right; a’, b, branches given off to the left; a, B, etc., lateral branches 
of second order given off in the direction of the distal end of the 
ancestral branch; a’, B’, ete., given off in the direction of proximal end; 
a,’, lateral branches of third order — to left. 
Fig. 2°. Diagram of another (smaller) stock. Letters have same significance as 
in foregoing. 
Fig. 3. Cross section of branch near tip, showing the first trace of the bud of the 
polypide at ex., i X 685. 
Fig. 4. Cross section of branch near tip, showing bud of polypide slightly older 
than in Figure 3. X 695. 
Fig. 5. Cross section of slightly collapsed branch near tip, showing ingression 
of cells at ex. to form inner layer of bud. X 635. 
Fig. 6. Longitudinal section of tip of branch to show cell structure. Zeiss, qfy 
oil immersion, Oc. 1. X 1000. 
Figs. 7, 8, 9. Optical sections (nearly in sagittal plane) of three tips of branches 
in successive stages of development, showing relations of young bud, 
gm., to next older polypide. In Figure 8 the branch is slightly 
shrunken, X 87. 
