. Bulletin - United States National Museum. Science. 356 BULLETIN 140, UNITED STATES NATIONAL MUSEUM Male mm. long hy 90> wide (fig. 418 a to d). Buccal-capsule 19/* long. Pharynx 225/* long. Esophagus 395/* long. Cervical pa- pillae slightly posterior to nerve ring, which surrounds the middle of the pharynx. Cloacal aperture 128/* from posterior extremity, bounded by a chitinous projecting ring. Caudal papillae distributed as follows: 2 pair preanal; one small median papilla situated at the center of the space which they bound; 2 pair postanal, slightly asym- metrical. Spicules of un
. Bulletin - United States National Museum. Science. 356 BULLETIN 140, UNITED STATES NATIONAL MUSEUM Male mm. long hy 90> wide (fig. 418 a to d). Buccal-capsule 19/* long. Pharynx 225/* long. Esophagus 395/* long. Cervical pa- pillae slightly posterior to nerve ring, which surrounds the middle of the pharynx. Cloacal aperture 128/* from posterior extremity, bounded by a chitinous projecting ring. Caudal papillae distributed as follows: 2 pair preanal; one small median papilla situated at the center of the space which they bound; 2 pair postanal, slightly asym- metrical. Spicules of unequal length, the left one mm. long, the right one 75/* long. Tail tapering, ends in small button. Female forming cysts 2 mm. large. Body coiled in complex man- ner (fig. 419 a to c). No longitudinal furrows as are found in spe- cies of Tetrameres. Cuticle of anterior extremity folded to give. Q/f7)f7) Figs. 417-418.—417, Microtetrameres helix, a, Male tail; b and c, females; d, female tail. Original. 418, Microtetrameres inermis. a, Male ; b, ven- tral view and c, lateral view of tail of same ; d, head end of same. (Scale APPLIES TO b, C, AND d.) AFTER SEURAT, 1913 appearance of spy-glass (fig. 419d). Buccal capsule 20/* long. Pharynx 300//, long (Linstow) or 260/* long (Seurat) by 40/* wide. Esophagus mm. long (Seurat) or 2 mm. long (Linstow) by 24/* wide. Cervical papillae slightly posterior to nerve ring which surrounds the middle of the pharynx. Intestine dark-brown. Seurat (1913c) says that in the adult female the intestine is com- pressed between the uteri, its walls almost pressed together, whereas in the }7oung female the intestine is voluminous and entirely filled with a maroon-colored mass which is undoubtedly a reserve supply of material to be used later during egg formation. Anus 135/* from posterior extremity. Vulva (fig. 420 6?) 95/* anterior to anus. Ves- tibule of ovejector (fig. 420 a and 5) 875/* long. Trompe in the form of a large reservoir 375
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