EASTERN PROVINCE NORTHERN REGION SPECIES. 185 



tachmeiit, not eveu witL tbeir short cutting* point; side cusps also, 1 

 presume, with cutting points, though none are shown in Morse's figure. 

 Laterals like the centrals, but asymmetrical by the suppression of the 

 inner side cusps and cutting points. Marginals low, wide, the broad 

 reflection equalling the base of attachment and irregularly denticu- 

 lated, as in Pvpn. 



There are two European species of this genus, A. acvleata and laniel- 

 lata, whose jaw is described by Lehmanu as rather striated than ribbed. 

 Their lingual dentition presents no generic differences from that of 

 harpa, though the cusps of the centrals are described as simply conical. 



Acaiitliiiiiila harpa, Say. 



Shell subperforate, ovately conic, transparent, very thin, with coarse, 

 irregular lines of growth, pellucid, light horn-color; spire fig. i83 

 conical, rather obtuse; whorls 4, convex, the upper ones 

 smooth, the two last with prominent, distant, thin, coloiless, 

 fold like ribs, slightly inclined backwards, the last whoil 

 rounded, somewhat longer than the spire; columella subie- 

 ceding; aperture Innately oval; peristome simple, straight, a hc^ 

 its columellar termination briefly reflected above. Greater enlarged. 

 diameter, 2'"°^; length, 3^™™; aperture. If'"'" long, l^"^"" wide. 



Helix harpa, Say, Long's Exped., ii, 256, pi. xv, tig. 1 (1824). — Binney's ed., 29, pi. 

 Ixxiv, fig. 1.— W. G. BiNXEY, L. & Fr.-W. Sh., i, 156 (1869).— Gould and 

 BixxEY, Inv. of Mass., ed. 2, 427 (1870). 



Fupa costulata, Mighels, Proc. Bost. Soc. Nat. Hist., i, 187 (1844). 



Bulimus harpa, Pfeifper, Zeitschr. f. Malak., l'-!47, 147; Mon. Hel. Viv., ii, 150; in 

 CheiMNITZ, ed. 2, No. 305, pi. Ix, figs. 17-19.— Reeve, Con. Icon., No. 596 

 (1849).— Binxey, Terr. Moll., ii, 290, pi. lii, fig. :!.— W. G. Binney, Terr. 

 Moll., iv, 135. 



Zoogenites harpa, Morse, .Jouni. Portl. Soc, i, 32, id. i, ligs. 1-14 (1^64); Amer. Nat., 



i, 608, figs. 50,61 (186s).— Tryox, Am. Journ. Couch., iii, 311 (1868). 

 Helix Amur en sis, Gerstf., teste M<)Rcn. 

 AcantMnula harpa, W. G. Binxey, Terr. Moll., v, 342. 



A circumpolar species, in North America found in the Northern 

 Eegiou — Gaspe ; JNIaine ; New Hampshire. Originally found by Say 

 on the expedition to Saint Peter's Eiver, &c. In British America, 

 English Kiver and James's Bay; in Europe, Sweden (Mai. Blatt., 1867, 

 200), Norway, Lapland, «&c. ; in Asia, Petropaulauski, in Kamtschatka. 



Animal small, <'oinpared to the size of the shell ; body and head slate- 

 color, eye-pedunJcs darker, short, thick, bulbous; eyes large, distinct; 



