. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 462 Mr. H. A. Baylis on new The genital pores are irregularly alternating. The cirrus- sac is pear-shaped and measures 0*125 mm. long and 0'04 mm. in thickness at its widest part, which is near the inner end. There are twelve or more testes in a compact group in the middle of the segment. The female genital apparatus calls for no special comment: the uterus (fig. 3, tit.) shows the usual more or less complete division into two lateral portions, and a well-developed paruterine
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 462 Mr. H. A. Baylis on new The genital pores are irregularly alternating. The cirrus- sac is pear-shaped and measures 0*125 mm. long and 0'04 mm. in thickness at its widest part, which is near the inner end. There are twelve or more testes in a compact group in the middle of the segment. The female genital apparatus calls for no special comment: the uterus (fig. 3, tit.) shows the usual more or less complete division into two lateral portions, and a well-developed paruterine organ (fig. 3, P.) is present in front of it in the posterior segments. The ova do not appear to pass into the paruterine organ until after the separation of the segments from the strobila. The oncho- spheres measure 28 /ju in diameter. 5. Davainea deb His, sp. n. Host: Anastomus lamelligerus. (Open-bill Stork.) Of this species the collection contains only one specimen, which measures about 45 mm. in length. The posterior segments are much contracted, and the length actually Fiff. Davainea debilis ; diagram of the genital cloaca and terminal portions of the genital ducts. (Reconstructed from horizontal sections.) The overlapping lateral borders of three consecutive segments are seen. C., cirrus; C/.i, distal non-muscular portion of genital cloaca; , proximal muscular portion of same; , cirrus-sac; V., vagina; , vas deferens. attained would probably be much greater. Anteriorly the worm is extremely slender, but it increases rapidly in width until the posterior segments measure about 3 mm. across. The scolex measures only 0'2 mm. across and is very feebly developed. The suckers appear as mere cushion-like thickenings. They were apparently armed with hooks about. 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
Size: 2080px × 1201px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookce, booksubjectbotany, booksubjectgeology, booksubjectzoology
