can, comn. 
Davenport —Cerata in Molis. 
PLATE II. 
ABBREVIATIONS. 
Communicating canal. 
cer.L,IL,ete. Cerata of I, IL, etc. 
cn'ph. 
co. 
ec'drm. 
ga. 
ga. 
ga. dv. 
gl. nid. 
gl. pd. 
gn. 
mo, buc. 
ms’drm. 
Figs. 9-11. Three stages in the development of the cerata. Vertical sections 
12. 
13. 
14. 
15. 
16, 
17. 
18. 
transverse rows. 
Cnidophore. 
Cocum. 
Ectoderm. 
Stomach. 
Posterior prolongation 
of stomach, 
Gastric diverticulum. 
Nidamental gland. 
Foot gland. 
Ganglion (cerebral). 
Buccal mass. 
Mesoderm. 
x 120. 
Longitudinal section of ceras just before formation of external opening of 
enidophore. X 120. 
Transverse section of adult enidophore, showing nematocysts. X 405. 
Bit of transverse section of hepatic cocum, showing fully formed and 
developirig nematocysts in hepatic cells. X 405. 
Bit of transverse section of hepatic cæcum, showing large nematophore. 
x 405. 
Longitudinal section of young JEolis, inclined about 30% from vertical, 
passing through axis of alimentary tract and first ceras of three trans- 
verse rows. X 76. 
Enlarged view of the posterior of the two regions marked by asterisks in 
Figure 16, but from a section adjacent to Figure 16, showing parietal 
mesoderm, some of which is about to form that of the youngest trans- 
verse row, and some to give rise to sexual cells, te. X 318 
Longitudinal section of young Æolis. Oblique in front, nearly frontal 
behind. Showing repetition of sexual organs and their relation to 
x 76. 
transverse rows of cerata. 
ms'drm.^ 
ms’drm.” 
nl'cy. 
nt'cy.^ 
nt'cy." 
pd. 
pe. ves 
rad. 
rhn. 
rt. 
ur 
L, IL, HL, 9, d. Lobes of ovary and 
Mesoderm lining body wall. 
Mesoderm lining hepatic 
cocum. 
Nematocyst, smaller kind. 
Developing nematocy st. 
Nematocyst, larger kind. 
Foot. 
Penis sac. 
Radula. 
Rhinophore. 
Rectum. 
Testis. 
Ureter. 
testis. 
