. Fresh-water biology. Freshwater biology. PARASITIC ROUNDWORMS 533 68 (s6) Meromyaria. Small transparent forms 69 For discussion of term Meromyaria see page 515. ^ Lips simple, inconspicuous. Vulva anterior. Caudal end of female distinctly elongate. Separated from Ascarids by some authors. 69 (70) Without esophageal or intestinal cecum. Family Oxyurddae Cobbold 1864. ^ The few North American records cannot be safely assigned on the basis of the present dis- tinction between this family and the next. Consequently they are left where they were placed originally. Among forms recorded from North
. Fresh-water biology. Freshwater biology. PARASITIC ROUNDWORMS 533 68 (s6) Meromyaria. Small transparent forms 69 For discussion of term Meromyaria see page 515. ^ Lips simple, inconspicuous. Vulva anterior. Caudal end of female distinctly elongate. Separated from Ascarids by some authors. 69 (70) Without esophageal or intestinal cecum. Family Oxyurddae Cobbold 1864. ^ The few North American records cannot be safely assigned on the basis of the present dis- tinction between this family and the next. Consequently they are left where they were placed originally. Among forms recorded from North America which caimot be placed at present owing to imperfect knowledge of their structure are: Oxyuris dubia Leidy 1856 reported from Bufo americanus and Salamandra rubra. Male unknown. North American genus Spironoura Leidy 1856. Mouth surrounded by circular, papillated lip. Tail of male spiral, acute, tuberculate. Spicules two, curved, ensiform, costate. Tail of female conical, acute. Vuiya at posterior third. Type species Spironoura gracile Leidy 1856. Female 16 by mm.; male 8 by mm. with two rows of three papillae on tail. Found in stomach of Emys serrata and Siredon mexicanus. Also recorded Spironoura qffine Leidy 1858. Female 9 by mm.; male 6 by mm., with two papillae on each side of tail near end. Foimd in cecum of Cistudo Carolina. 70 (69) With cecum on esophagus or intestine, or on both. Family Heterocheilldae Railliet and Henry 1915 . 71 71 (74) With papillae on tail of male and with ceca on both esophagus and intestine Co?j/mcoecM»j Railliet and Henry 1912. 72 (73) Without circle of spines on tail. Contracoecum spiculigerum (Rudolphi) 1809. Male 18 to qo mm., female 30 to 154 mm. long. Lips sinall; interlabia well developed with a small notch at outer margin. Intes- tine with diverticulum at anterior end. Tail of male with 7 postanal papillae many (=t 40) preanals in 2 lateral series. Spicules very long, usually well extended, and recurved. Vulra an
Size: 1491px × 1676px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
