Fig. 
Fig. 
38a. 
ag: 
. 40. 
41. 
59. 
60. 
ELEDONE. 569 
Prare, V. 
Transverse section of oesophagus (enlarged). 
Transverse section of tubules of posterior 
salivary gland. 
Transverse section of tubules of anterior 
salivary gland. 
Transverse section of secretory tubule of 
salivary gland, showing secretory cells. 
Kidneys, seen from ventral surface, after 
removal of visceral envelope. Female. x 1. 
Spiral caecum, opened along columellar edge 
of spiral, and walls pinned back. ‘The series 
of transverse valves may be seen, and the 
internal aperture of the hepato-pancreatic 
autete, <1. 
View of viscera, after removing kidney and 
heart, and turning liver forward—from 
ventral surface. x i. 
Ovary, and female genital ducts. The ventral 
germinal wall has been turned forward 
anteriorly. x 1. 
Sketch showing relation of pericardial division 
of coelom to water vascular canal and ‘ureter. 
Reno-pericardial aperture seen at base of 
opened ureter. x 4. 
View of portion of germinal wall of ovary, from 
inner surface, showing attachment of the eggs 
in racemes. x 4. 
Right gill—ventral view. x 1. 
Portion of gill, from inner surface, showing 
alternating arrangement of inner and outer 
leaflets: the central inner leaflet removed. 
(Enlarged.) 
Prate VI. 
Injection of arterial system, showing the dis- 
tribution of the main brachial, cephalic, 
palhal, genital and visceral ibmamclhes,. From 
ventral surface—partly diagrammatic. x 2. 
