. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). TYPE PLA TYIIELMINTUES. 139 vdi in the Tiiclads otocysts are wnutiii^, nor have oiliateil hiteral depressions been described as occurriu}» in the order. Little is kiiowu coucerniii^ the excretory systen). Tlie reproduc- tive system ditters from tiiat of the other orders in that tlie male and the female a])])aratus each possess a separate o])eninjj; (?â and ?), there beiujj; no }j;(Miital atrium common to botli. lioth apertures lie behind tlio mouth-o])eniu^, near the
. A textbook of invertebrate morphology [microform]. Invertebrates; Morphology (Animals); Invertébrés; Morphologie (Animaux). TYPE PLA TYIIELMINTUES. 139 vdi in the Tiiclads otocysts are wnutiii^, nor have oiliateil hiteral depressions been described as occurriu}» in the order. Little is kiiowu coucerniii^ the excretory systen). Tlie reproduc- tive system ditters from tiiat of the other orders in that tlie male and the female a])])aratus each possess a separate o])eninjj; (?â and ?), there beiujj; no }j;(Miital atrium common to botli. lioth apertures lie behind tlio mouth-o])eniu^, near the ]>osterior end of the l)ody, the male ap])aratus openinjj; an- teriorly to the female. The former is similar in structure to what has been described for the Triclads. The female apparatus ])ossess(»s no vitellarium, and the ovaries {ov) are very numerous, lyiuj^ in the ^^ hiteral parts of the body, their various ducts unitin*^ to form wide canals which serve as uteri {nt). Those open into a sin<j;le tube, the 'iXKjina, which receives the secretion of the numerous glands isfj) which form the shell-j^land in some forms tluae is situated about the middle of the ventral surface of the body a muscular sucker which serves as an or^an of adhesion. Since the prest;nc(i or abscMice of this orj^an is in either case associated with theoccurrtiuce of other important strui^tural ])ecu- liarities, the order has been divided into two subordersâ the (Joltjlea, provided witli a sucker (77///.«,vn/«- (?. 2 = malcaiMi finrnhMmilccs. zoon^ Eurylepta), and the Acofyha, iu which it is absent {Planocera, Leptophiiut).. I-AHIAN, /A'ptopliiiiti alcinoi (lll'icl- Lanqi. </</ -- at'CL'Ssory frlantl. ce -- cerebral j^aiiniion. ov = ovary. p/i = St/ = .slicli-giaiid. (f := testis ut - iitrnis. vd - vas deferens. vs = vesicula Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability -
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1894
