68 BRISTOL. 



the median side of the collar at the level of the root of the nerves I, II. One 

 large and two small capsules are connected with the sympathetic at each junction, 

 which sends a dorsal and a ventral nerve bundle, shown here, and a lateral 

 bundle not shown here, to the muscular wall of the alimentary canal. See 

 PI. VI, Fig. 17. 



Fig. 14. "Anal ganglia," dorsal view. 



Fig. 1 5. Ventral view of same. Metameres in Roman numerals. Capsules 

 in Arabic figures. In Fig. 14 the crowding of the lateral capsules to the dorsal 

 side begins with neuromere XXVIII, while the ventral capsules. Fig. 15, of the 

 same neuromere are also crowded out of the normal. The seven neuromeres, 

 XXVIII to XXXIV, constitute the entire "anal ganglia " of Clepsine. XXV is 

 nearly normal, lateral nerves not fused ; XXVI is slightly compressed, lateral 

 nerves fused, but the two roots are plainly visible; XXVII is still more com- 

 pressed. These three neuromeres indicate the extent to which abbreviation has 

 proceeded farther in Nephelis than in Clepsine in this region. 



