Coe —Terrestrial Nemertean of Bermuda. 
PLATE 25. 
Geonemertes agricola. 
Fig. 17. Transverse section of body of early embryo, showing the solid mass 
of endodermic cells {in'.), the lateral nerve ( n. 1.), and the group of 
ectodermic and mesodermic cells ( prb'.) which later form the pro¬ 
boscis and proboscis sheath. X 237. 
Fig. 18. Transverse section of body of late embryo, showing vacuolated 
endodermic cells surrounding cavity of intestine (in.), and the well 
developed proboscis (prb.) in proboscis sheath. X 237. 
Fig. 19. Nearly frontal section of anterior portion of body of late embryo, 
showing rhynchodaeum (rhnd.) leading through narrow esophagus 
to stomach (gas.), the relations of brain (cb.) to lateral nerve 
(n.l), and the highly developed cephalic glands (gl. ce.). X 237. 
Fig. 20. Portion of longitudinal section of proboscis, showing the central 
stylet and basis formed from an outgrowth of the proboscis 
epithelium. X 530. 
Fig. 21. A similar section in a somewhat later embryo, showing the two 
pouches of accessory stylets opening through duct ( dt .) into ante¬ 
rior chamber. X 530. 
Figs. 22 and 23. Transverse sections of basis of central stylet in mature 
embryo, showing relations of cells by which the basis is secreted. 
X 530. 
Figs. 24 and 25. Longitudinal sections of basis of central stylet, showing out¬ 
line of mold formed by the epithelial cells by which basis is 
secreted. X 530. 
Fig. 26. Portion of transverse section of body of worm which contained 
mature embryos, showing one of the spermaries which develop 
at the same time. The efferent duct leads into, but not through, 
the integument (iteg.). Groups of spermatogonia (sp’go.), sper¬ 
matocytes (sp'go 1 .), and spermatozoa (sp'zo.) in various stages of 
development occur. X 530. 
