. Bulletin - United States National Museum. Science. 46 BULLETIN 140, UNITED STATES NATIONAL MUSEUM diameter. Esophagus 730/* long, clavate, its diameter 74//, at the anterior end, 130/x at the posterior end; nerve ring at the middle of the length, cervical papillae at about posterior seventh of esophagus, excretory pore just anterior to beginning of intestine. Bursa (fig. 61) well developed, 750/x in transverse diameter when outspread. Ventral rays similar and approximate; externo-lateral shorter than other lateral rays and with a prominent ventral hump; medio-lateral and postero-lateral rays
. Bulletin - United States National Museum. Science. 46 BULLETIN 140, UNITED STATES NATIONAL MUSEUM diameter. Esophagus 730/* long, clavate, its diameter 74//, at the anterior end, 130/x at the posterior end; nerve ring at the middle of the length, cervical papillae at about posterior seventh of esophagus, excretory pore just anterior to beginning of intestine. Bursa (fig. 61) well developed, 750/x in transverse diameter when outspread. Ventral rays similar and approximate; externo-lateral shorter than other lateral rays and with a prominent ventral hump; medio-lateral and postero-lateral rays similar and approximate; externo-dorsal. Fig. 59. -Cl'ATHOSTOMA AMERICANUM. OUTLINE OF FEMALE AND MALE WORMS. CHAPIN, 1925 (a> = EXTENT OF UTERI) After ray more slender than, but equal in length to, the externo-lateral ray, arising at the base of the dorsal ray. Dorsal ray divided near its extremity into 2 simple branches. Spicules filiform, equal, from 470 to 490/x long, united at their tips and each bearing a finely striated wing. Female up to 30 mm. long; similar in form (fig. 59) to the male. Buccal capsule (fig. 60) much broader than deep, its internal transverse diameter 370/i, the depth of its chitinous portion 280/x;. 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. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
