38 (3i) One or two setae per bundle. Dorsal setae absent from segment II at least 39 



38 (54) Two to nine setae per bundle (very rarely one). Dorsal setae present on all segments. 40 



39 (38) Dorsal and ventral setae two per bundle; dorsal setae 

 of segment II, and sometimes III, absent. Posterior 



pharyngeal glands not united dorsally (Fig. 69) 



Marionina southerni 



Figure 69. — Dorsal view of pharyngeal glands; A, anterior 

 direction. 



39 (38) Dorsal and ventral setae two per bundle on segments III 

 to V; dorsals absent on segments II and VII to XVI; 

 all setae one per bundle from segment XVII. Posterior 



pharyngeal glands united dorsally (Fig. 70) 



Marionina welchi 



Figure 70. — Dorsal view of pharyngeal glands; A, anterior 

 direction. 



40 (38) Peptonephridia (P) present 

 (seen best in living speci- 

 mens) (Fig. 71). Fifteen 

 to 35 mm long. Forty-six to 

 65 segments 41 



Figure 71. — Lateral view of 

 anterior segments; P, 

 peptonephridium; Ph, 

 pharyngeal glands. 



40 (38) Peptonephridia absent. Four to 15 mm long. 



Twenty-six to 50 segments 42 



41 (W) Spermathecal duct covered by a dense layer of gland cells (Fig. 

 72). Twenty to 35 mm long. Two to five setae per bundle 

 posteriorly Enchytraeus albidtis 



Figure 72. — Lateral view of spermatheca ; S, ampulla; G, gland 

 cells. 



41 (J^0) Spermathecal duct devoid of glandular cells except for a ring 

 of glands round the spermathecal opening (Fig. 73). Fifteen 



to 20 mm long. One or two setae per bundle posteriorly 



Enchytraeiis capitatus 



Figure 73. — Lateral view of spermatheca; S, ampulla; G, gland 

 cells. 



16 



