Spengelomenia. 477 
Explanation of Plates. 
Plate 24. 
Fig. 1. Reconstruction of anterior end of Spengelomenia bathybia, 
showing brain and main nerves; the three sets of salivary glands, the 
globular lobules of one set being removed in part to show the main duct 
leading to outlet into pharynx. gon gonad. pg outlet of anterior pedal 
gland. 
Fig. 2. Section through dorsal commissure and portion of pericar- 
dium (p) corresponding to line H in Pl. 24 Fig. 12. Under the nerve is 
the rectum beneath which is a portion of the cloaca, while the coelomo- 
duct surrounded by circular muscles lies close to the ventral side. 50:1. 
Fig. 3. Section along line @, Pl. 24 Fig. 12. The rectum is located 
beneath the pericardium (p) beneath which are the dorsal and ventral 
limbs of the coelomoducts, the latter surrounded by gland cells. 50:1. 
Fig. 4. Section along line 5, Pl. 24 Fig. 1 to show outlet from the 
ducts of the great lobulate ventral salivary glands. 50:1. 
Fig. 5. Section along line ©, Pl. 24 Fig. 1. The pharynx is sur- 
rounded by the lobules of the massive ventral salivary glands whose main 
ducts are lateral to the radula. 50:1. 
Fig. 6. Section showing the cuticle, a papilla and the hypodermis. 
830: 1. 
Fig. 7. Spines from side of body opposite front end of gonad. 
330:: 1. 
Fig. 8. Section through eloaca corresponding to line J, Pl. 24 Fig. 12. 
BUT, 
Fig. 9. Ventral folds, pedal glands and ventral nerve cords with 
commissure. 135:1. 
Fig. 10. Section through posterior end of pharynx corresponding to 
hnern), Pl: 24 Fig. 1. 24:1. 
