DAVENPORT. —Cerata in AXolis. 
an. 
can. comn. 
cer. 1, 2, etc. 
en’ph. 
ce. 
ca.! 
epl. 
ec’drm. 
ec’drm.’ 
en’'drm’ 
Figs. 1, 2. 
PLATESE 
ABBREVIATIONS. 
Anus. qa. 
Communicating canal. ga. 
Cerata of the same trans- 
verse series. ga dv. 
Cnidophore. 
Hepatic coecum. ms’chy.’ 
Forming hepatic coecum. 
Capillary vessel. @. 
Ectoderm. pd. 
Ectoderm of young ceras. rt. 
Entoderm of young ceras. 
Stomach. 
Prolongation of stomach back- 
wards. 
Gastric diverticulum at base of 
transverse rows of cerata. 
Mesenchyme of developing 
ceras. 
(Esophagus. 
Foot 
Rectum. 
Two figures of young individuals of Molis sp., showing arrangement 
of cerata in transverse rows, which are numbered with Roman 
numerals. X 5d. 
« 3. Transverse section of a young /Kolis showing the stomach, the gastric 
diverticulum, and hepatic coeca of a transverse row of cerata. X 45. 
4. Outline of alimentary tract of Aolis, copied from Alder and Hancock, show- 
ing gastric diverticula and points of connection of hepatic caeca. 
5-8. Four vertical sections through different stages in the development of the 
“ 
“ce 
«e 
“ 
5. 
6. 
cerata. 
First stage in formation of ceras. 
Right side. X 405. 
Second stage in formation of ceras. 
Ectoderm beginning to evaginate in the axis. Left side. 
Third stage in formation of ceras. 
fold to form hepatic cecum of new ceras. Left side. 
Fourth stage in formation of ceras. 
Right side. 
Mesenchyme thickened at ms’chy. 
Mesenchyme thickened still further. 
x 4065. 
Gastric diverticulum beginning to out- 
X 228. 
X 228. 
