. The Canadian field-naturalist. . ^tâ fc^ 5. Figures 1-7. 1. Bothriocephalus sp., whole immature worm. 2. Cylindrotaenia americana, scolex. 3. Cylindrotaenia americana, pregravid proglottides showing position of paruterine organs. 4. Proteocephalus saphena, scolex. 5. Proteocephalus saphena, mature proglottis. 6. Proteocephalus saphena, juvenile worm. 7. Proteocephalid plerocercoid. unidentified plerocercoids reported by Ulmer and cephalid cysts and plerocercoids are summarized in James (1976). In all New Brunswick worms the api- cal organ is well developed. Although Ulmer and James (1976) no
. The Canadian field-naturalist. . ^tâ fc^ 5. Figures 1-7. 1. Bothriocephalus sp., whole immature worm. 2. Cylindrotaenia americana, scolex. 3. Cylindrotaenia americana, pregravid proglottides showing position of paruterine organs. 4. Proteocephalus saphena, scolex. 5. Proteocephalus saphena, mature proglottis. 6. Proteocephalus saphena, juvenile worm. 7. Proteocephalid plerocercoid. unidentified plerocercoids reported by Ulmer and cephalid cysts and plerocercoids are summarized in James (1976). In all New Brunswick worms the api- cal organ is well developed. Although Ulmer and James (1976) noted evidence of immature proglot- tids in larger plerocercoids, in New Brunswick mate- rial this was evident only in a specimen of moderate length encysted near the liver in a Leopard Frog. Previous definitive host records for proteo- Prudhoe and Bray (1982). Digenea Family Derogenidae Nicoll, 1910 *Halipegus occidualis Stafford, 1905 (Figure 8) R. catesbeiana, eustachian tube, stomach, duode-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
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