33 (5) Dorsal and ventral setae absent from all segments. 

 Coelomocytes in posterior segments large, opaque, white 

 flat discs (Fig. 62) Marionina achaeta 



Figure 62. — Lateral view of segment from middle region of 

 body; C, coelomocyto. 



33 (5) Dorsal, or ventral, or both, setae present on all, or some segments. Coelomocytes not 



of the above form 34 



34 (33) Dorsal setae absent from all segments 35 



34 (33) Dorsal setae present on all, or some, se.gments 38 



35 (3i) Whenever present, ventral setae one per bundle 36 



35 (54) Whenever present, ventral setae two per bundle 37 



36 (35) Ventral setae present on all segments. 

 Proximal ends of setae hook-shaped 

 (Fig. 63). Pharyngeal glands united 



dorsally (Fig. 64) 



Lumbricillus codensis 



Figure 63 (top). — Ventral seta. 



Figure 64 (bottom). — Dorsal view of seg- 

 ments V, VI, and 1/2 VII; A, anterior 

 direction. (Stippled areas in this, and 

 Fig. 66 to 70, are pharjTigeal glands.) 



36 (35) Ventral setae absent from about the first 15 

 segments. Proximal ends of setae broad, spat- 

 ulate (Fig. 65). Pharyngeal glands not united 

 dorsally (Fig. 66). . . .Hemigrania postcUteUochaeta 



Figure 65 (top). — Ventral seta. 

 Figure 66 (bottom). — Dorsal view of 



pharyngeal glands; A, anterior 



direction. 



37 (35) Ventral setae present on all segments. With three 

 pharyngeal glands, all united dorsally (Fig. 67). ... 

 Marionina subterranea 



Figure 67. — Dorsal view of pharyngeal glands; A, anterior 

 direction. 



37 (35) Ventral setae present on segments II to VI, but are absent 

 thereafter. With two pharyngeal glands, both united dor- 

 sally (Fig. 68) Marionina preclitellochaeta 



Figure 68. — Dorsal view of pharyngeal glands; A, anterior 

 direction. 



15 



