FIGURE 5 in Biology, morphology and taxonomy of a snail-feeding leech from North Carolina, USA, provisionally identified as Helobdella lineata (Verrill, 1874) (Glossiphoniidae): First evidence for extra-oral digestion in the Hirudinea

FIGURE 5. Dissections of individuals of H. lineata from disparate locations in the Albemarle region reveal that certain features of the digestive and reproductive systems are anatomically invariant. This relative lack of internal variability corroborates the tentative view they all represent the same biological species in this region regardless of pigmentation and papillation. A, Pasquotank County (HL-5A, 12.8 mm); B, Wayne County (HL-6A, 18.5 mm); C, Tyrrell County (HL-15A. 15.5 mm). Abbreviations: a, atrium; cc, crop caecum; es, esophagus; ic, intestinal caecum; pc, posterior crop caecum; pr, proboscis; r, rectum; sc, salivary cell; sb, salivary bundle; sv, seminal vesicle; t, testis; tp, tip of proboscis.