. Bulletin - United States National Museum. Science. EASTERN PROVINCE NORTHERN REGION SPECIES. 181 Fig. 175. Morse uses the name Bimieyi, which can be employed, if necessary, to distinguish the species from Pfeiifer's. Genitalia not observed. Zoiiites ferreiis, Morse. Shell umbilicated, depressed-globose, transparent, of a very light steel-gray color, not shining, marked with very delicate incremental wrinkles and microscopic revolving lines; spire slightlj" elevated ; whorls 3, rounded, the last rap- idly enlarging, globose; aperture large, transversely subcircular; i^eristome simple, ac
. Bulletin - United States National Museum. Science. EASTERN PROVINCE NORTHERN REGION SPECIES. 181 Fig. 175. Morse uses the name Bimieyi, which can be employed, if necessary, to distinguish the species from Pfeiifer's. Genitalia not observed. Zoiiites ferreiis, Morse. Shell umbilicated, depressed-globose, transparent, of a very light steel-gray color, not shining, marked with very delicate incremental wrinkles and microscopic revolving lines; spire slightlj" elevated ; whorls 3, rounded, the last rap- idly enlarging, globose; aperture large, transversely subcircular; i^eristome simple, acute, its extremities not approaching, that of the columella scarcely subreflected. Greatest diameter, 2^"""; height, l^'""^ Striatura ferrea, Morse, Proc. Portl. S. N. H., i, 17, figs. 3G-40, and pi. ii, fig. 10 (1864). Bi/alinaferrea, Tryon, Conch., ij,25:i (1866).—W. G. Bixnev. L. & W. Sh., i, 40 (1869).—Gould and Binney, Invert, of Mass., , 401 (1870). Helix ferrea, Morse, Amer. Nat., i, 544, fig. 37 (1867). Zonites ferreus, W. G. BiNiney, Terr. Moll., v, 121. Z. ferreus. Fig. JSivr of Z. ferreus. () Maine; a species of the Northern Eegion. Jaw angularly arched, ends ta- pering, acute; anterior surface deeply channeled in its center; concave margin smooth, with a deep median indentation, probably worn by the greatly developed cen- tral tooth of the lingual membrane. Lingual membrane with 39 curving rows of 20-1-20 teeth ; centrals enormously developed, very broad, tricusi)id, the middle cusp very broad; two bicuspid laterals on each side, the inner much the smaller; marginals aculeate. Another membrane (Terr. Moll., V, Plate III, Fig. P) had also 20-1-20 teeth, with 2 perfect laterals. In the great development of the central t-oth this species resembles Z. milium. Genitalia unobserved. Zonites exig^uus, Stimpson, Shell broadly umbilicated, depressed, pellucid, greenish horn color, marked with delicate revolv
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