FIGURE 2. Pilaridrilus uliginosus. A in Two new genera of Lumbriculidae (Annelida, Clitellata) from North Carolina, USA

FIGURE 2. Pilaridrilus uliginosus. A. Genital segments of a contracted worm (fixed in alcohol), showing the normal positions of reproductive organs: male pores in X (GII), spermathecal pores in XV (covered by atrium, but three segments behind the theoretical GIV). B. Reproductive organs of a worm fixed in Bouin's solution (in two parts); note that despite the forward shift of male and spermathecal pores by two segments, the spermathecal pores are still three segments behind the theoretical GIV in this atypical specimen. C–E. Penial structures: a Bouin's-preserved worm, with penis withdrawn into the atrial duct (C); an alcohol-preserved worm, with penis extended into the penial chamber (D), and with penis extended beyond the male pore (E). Scale bars: A, B 500 μm; C–E 200 μm.