RMRJ6JBP–. The Batrachia of North America [microform]. Amphibians; Amphibiens. 'l .! â 144 niLi.KriN :ii, I'MTKi) siaths national miiskiim. tlc'},Met's. Thc.v arc .si'i'iiiatod IVoin each otluT on the iiicMliaii lino by a slMJit iiit('rsi>a(Taii(irn)iiilli(>|)arasi.liL-ii<)i(l.sl..valittU'l()iiKt'iM)iH'. This fonii is (juilc dilVcivnt from tliat ciianictoiistic of tlio P. (/liitino.sHs. There tlio series pass beliiiul tlie choatiie, soinetlines even beyoiul their external border, and from (wo arched scries, not directed backwards in any such dej;iee as seen in tiic i'. anded at the tii)s, as i