72 (70) Separate genital pores; colored by the presence of symbionts or pigment; seminal bursa with two, more or less 

 curved or spiraled nozzles (Figs. 152, 153, 154) Genus Ainphiscolops. 



Figure \Sl.—Amphiscolops langerhansi. dorsal view. 



Figure 153. — Amphiscolops cinereus, seminal bur^. 



Figure 154.— Amphiscolops bermudensis: a-dorsal view; b-sagittal reconstniclion of male and female accessory organs. 



72 (70) Common genital pore; white, or colored only by the presence of food products; seminal bursa with two or 

 more short cone-shaped nozzles. From the Pacific coasts of the United States and U.S.S.R. (Fig. 155) . . . 

 Genus Diatomovora. 



F~igure 155. — Diatomovora amoena. 



47 



