. Bulletin - United States National Museum. Science. 252 BULLETIN 140, UNITED STATES NATIONAL MUSEUM Life history.—Unknown; probably involves intermediate stages in other hosts (see E. uncinata, p. 246). Distribution.—North America (United States (National Zoologi- cal Park, Washington, D. C.) ). Type specimens.—United States National Museum (Bureau of Animal Industry) Helminthological Collection No. 18566; collected by Dr. Leigh Giltner. The female genitalia of this species as described above are very different from those of E. uncinata as described by Seurat. The lat- ter species has a short
. Bulletin - United States National Museum. Science. 252 BULLETIN 140, UNITED STATES NATIONAL MUSEUM Life history.—Unknown; probably involves intermediate stages in other hosts (see E. uncinata, p. 246). Distribution.—North America (United States (National Zoologi- cal Park, Washington, D. C.) ). Type specimens.—United States National Museum (Bureau of Animal Industry) Helminthological Collection No. 18566; collected by Dr. Leigh Giltner. The female genitalia of this species as described above are very different from those of E. uncinata as described by Seurat. The lat- ter species has a short ovejector of the type of Dispharynx with a bi-. O-jmm 02 mm o/mm o-2/nm Fig. 314.—Echinuria decorata. a, Anterior end; b, cordon; c, female tail; d, vulva and vestibule ; e, vulva, ovejector, and uteeus ; f, male tail ; g and 7l, spicules. Original partite varnish gland (trompe) which connects with the 2 uteri. As a transition form between the didelphic E. uncinata and the monodel- phic E. decorata there is E. hargilae. Baylis and Daubney state that this species may be considered monodelphic, as it has only 1 functional uterus, the other uterus being represented only by a blind sac-like In E. decorata even this remnant has dis- appeared. The present writer has been unable to find any refer- ence to any other monodelphic form in the Spiruroidea; whenever the number of uteri is given there are always two or more. The absence of any reference to the character of the internal genitalia in the great majority of forms, however, indicates the need for closer observation and more extensive 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 United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ];
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