Figure 105c, d. — Limnoposthia polonica. 



52 (46) Copulatory organ with a cone-shaped penis built up of cuticular (Fig. 106), or muscular (Fig. 107 elements 

 and never invaginated into a seminal vesicle Family CHILDIIDAE (p. 62) 



.53 



Figure 106. — Paraphanostoma macroposlhium. 



Figure 107. — Paraproporus diovatus. 



52 (46) Copulatory organ with a tube-shaped, muscular and often glandular penis. This may be simply a direct inva- 

 gination of the body wall without a male antrum or true seminal vesicle (Fig. 108), or it may be combined with 

 either one or both of a male antrum or a seminal vesicle. It is often invaginated into or surrounded by the 

 seminal vesicle (Fig. 109) or a penis sac (Fig. 110) Family CONVOLUTIDAE (p. 58) 



.63 



Figure 108. — Proconvoluta primitiva. 



y^k'O 



Figure 109, — Pseudaphanostoma psammophUum. 



35 



Figure 110. — Haphdiscus bockL 



