\1 (14) Penis and seminal vesicle well developed (Fig. 26); free-living 



.Genus Hallangia. 



Figure 76.— Hallangia proporoides. 



17 {14} Penis and seminal vesicle reduced (Fig. 27); parasitic; from the Caspian Sea 



Genus Aechmalolus. 



Figure 27. — Aechmalolus pyrola: a-dorsal view; b-cross section of 

 copulatoo' organs. 



18 (/J) Mouth with archipharynx (Fig. 28) y^ «■'«.. -^-v^-j. 



. . . Family NADINIDAE (p. 61) y^ /2> . "^.^ 



1 Genus Nadina. ( /^^^ ^. ^^ Co) ) /f^^\ 



Figure 1i.— Nadina pulchella. ^^ ' ■ — *v 



? ^ 



18 (/i) Mouthwithpharynxsimplexor without a pharynx 19 



_ vagina 



19 {IS) Seminal bursa present, opening posterior to the male iff — 

 copulatory organ either through a common genital pore \ vV /'//^^^^^^^^'^X ^^^ 



or through a separate female pore (Figs. 29, 30) \ V^^/ i'W // -%-"// 



Family OTOCELIDIDAE (p. 61) 20 V^B^ Ud uf^fE 



Figure 29. — Olocelis wesibladi. 



16 



