. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. Ortmann: Families and Genera oi Najai 255 than in the male. The "inside flap" can onlj be the inner edge of the mantle, which is present, however, in the male also. The true position of tlii> species was first indicated bj Sterki (1907, p. 48). Quadrula metanevra (Rafinesque). Thirteen specimens of either sex, one a gravid female, were exam- ined in the laboratory, all from the Allegheny and Ohio Rivers in western Pennsylvania; additional specimens were examined in the. mp Fig. 6
. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. Ortmann: Families and Genera oi Najai 255 than in the male. The "inside flap" can onlj be the inner edge of the mantle, which is present, however, in the male also. The true position of tlii> species was first indicated bj Sterki (1907, p. 48). Quadrula metanevra (Rafinesque). Thirteen specimens of either sex, one a gravid female, were exam- ined in the laboratory, all from the Allegheny and Ohio Rivers in western Pennsylvania; additional specimens were examined in the. mp Fig. 6. Quadrula metanevra (Rafinesque). Male, from Allegheny River, Kelly, Armstrong Co., Pa. (Cam. Mus., No. 61, 4,549.) Coll. May 20, 1910. held, in the Ohio River in West Virginia and Ohio, and two (male and female) were received from the Ouachita River in Arkansas (H. E. Wheeler). The gravid female was found on June 22, 1909, and had only eggs. Margins of the mantle con- nected so as to separate anal and supra-anal openings; this connection is short, but in no case was found to be absent. Supra-anal very large. Bran- chial with well developed pa- pilla', anal practically smooth, or only with mere traces of ir- regular crenulations. Palpi with tin' posterior margins connected for about one-fourth to one-third of their length. (?ills short and wide, their anterior attachment as usual. Dia-. 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 Carnegie Museum; Carnegie Museum of Natural History. [Pittsburgh] : Published by authority of the Board of Trustees of the Carnegie Institute
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
