XI. Mollusca für 1906. 51 



Varietäten abgebildet ibid., p. 163 Textfig. 20 — 23; — {Oulnaria) ovata 

 var. koehleri n. var., Honigmann, in: Nachrbl. D. mal. Ges., v. 38 p. 45; 



— (Limnus) stagnalis bungei n. f., Teutoburger Wald; id. p. 201; — 

 hinkleyi n. sp., Idaho; Baker, in: Nautilus, v. 19 p. 145; — danielseni 

 n. sp., Indiana; Baker, ibid., v. 20 p. 55; — nasoni n. sp., Alpena, 

 Michigan: Baker (2), p. 1. 



Ancylus {Ouett.) tanganycensis n. sp., Tanganyika; Smith (5), p. 184 t. 10 

 f. 17, 18; — - walkeri n. sp., Ozarkgebirge ; Pilsbry «& Ferriss (2), p. 565 

 Textfig. 5. 



Planorhis {Quett.) carus n. sp., Texas; Pilsbry & Ferriss, P. Ac. Philad., 

 p. 164 t. 9 f. 4, 5; — filocinctus n. sp., Arizona; iid. p. 165 t. 9 f. 1 — 3; 



— sagoensis n. sp., Mt. Sago, Sumatra; Bullen, Pr. mal. Soc. VII, 

 p. 129, Textfig. 



Segmentina (Flem.) kennardi n. sp., Singalong, Sumatra; Bullen, Pr. mal. 

 Soc. VII, p. 130, Textfig. 



Isidora (Forsk.). Die neuseeländischen Arten {tabulata Gould, hochstetteri 

 Dkr., novae-zeelandiae Sow., antipodea Sow. und lirata Ten. Woods) 

 verkehrt abgebildet bei Suter, Trans. N. Zeal. Inst., v. 37; Berichtigimg 

 V. 38 p. 333. 



Amphigyra n. gen., Limnaeidarum ; Pilsbry, in: Nautilus, v. 20 p. 49 (the 

 Shell is minute, neritoid or Crepidula-like, with a small depressed 

 lateral spire, apparently dextral, composed of about 1^ very rapidly 

 enlarging whorls the last very convex dorsally imperforate; the apex 

 is snaooth, and the last whorl is spirally striate. The apertxu"e is very 

 'arge, oblique, transversely oval, the peristome continuous and free, 

 thin. Cavity of the spire very small, a thin, broad, concave columellar 

 plate projecting across the and next the spire, as in Crepidula or Latia ; 

 Anatomie wie bei den Limnaen); — alabamensis n. sp., Alabama; 

 id. p. 50 t. 3 f. 1, 2. 



Ncoplanorbis n. gen., id. p. 50 (the shell is minute, subdiscoidal, nearly 

 flat above, convex below, perforate, carinate, at the periphery com- 

 posed of about two rapidly enlarging v/horls, the apex impressed 

 and turned in. The aperture is very oblique, wider than high, a little 

 dilated at the base. Peristome thin, not continuous, the columellar 

 margin straight and broadly dilated, somewhat thickened within. — 

 The dentition and so far as knovm the soft anatomy, is similar to 

 Amphigyra); — tantillus n. sp., Alabama; id. p. 51 t. 3 f. 3 — 5. 



Lepyrium (Psbry.) showalteri caJiawbensis n. subsp., Cahawba River, Pilsbry, 

 in: Nautilus, v. 20 p. 81. 



Planorhis (Guettard) florissantensis n. sp., Oligocän von Florissant, Colorado; 

 Cockerell, in: Nautilus, v. 19 p. 100. 



Dali, Nautilus, v. 19 p. 104, macht auf einige vergessene Untergattungen 

 von Planorhis aufmerksam, die Benson in J. Asiat. Soc. Bengal. 1855, 

 v. 24, aufgestellt hat; Helicorbis Bens, ist = Hippeutis Agassiz 1837; — 

 Trochorbis Bens. = Segmentina. Flem. 1817; — Omalodiscus Bens. 

 (= Spirorbis Swains. 1840 nee Daudin 1800) ist = Qyraulus Agassiz 



4* 



