PATULA. 



167 



P. Horni. 



Hyalina pauper, Gould, Pr. Bost. Soc. N. H., VI. 423 ; Otia, 

 102. 



An Asiatic species, found also in Alaska, if I am right in 

 referring to it the Ounalaska specimens called ruderata by Dr. 

 Cooper (Am. Journ. Conch. , V. 202). 



The specimen figured was collected by Dr. Dall at Petro- 

 paulauski. 



1 P. pauper. 



Patula Horni, Gabb. 



Shell umbilicated, globosely depressed, thin, coarse, reddish horn-color, under 

 the epidermis obliquely striate, hirsute ; whorls 4, scarcely convex, the last in- 

 Fig. 78 flated below ; umbilicus pervious, showing the whorls to the apex ; 

 aperture oblique, subcircular ; peristome simple, acute, its ends 

 hardly approaching, that of the columella not widened, nor re- 

 flected. Greater diameter, 4, lesser, 3^ mill. ; height, 1 mill. 



Helix Hornii, Gabb, Am. Journ. Conch., II. 330, PI. XXI. Fig. 5 



(1866). — W. G. Binney, L. k Fr.-W. Sh., I. 81, Fig. 143 (1869). 

 Hyalina Hornii, Tryon, Am. Journ. Conch., III. 163 (1867). 



Fort Grant, Arizona, at the junction of the Arivapa and San Pedro Rivers, 

 in the Central Province. 



My description and figure are drawn from an authentic specimen. 

 Animal not examined. 



Patula asteriscus, Morse. 

 Shell widely umbilicated, orbicularly depressed, light brown, decussated 

 by delicate incremental and revolving striae and with from 25 to 30 delicate, 

 thin, transparent, prominent ribs, with waving edges and 

 inclined backwards, more like the epidermis than the tex- 

 ture of the shell ; whorls 4, the upper ones flattened, the 

 last globose ; suture deeply impressed ; aperture subcircu- 

 lar ; peristome simple, acute, its columellar extremity sub- 

 reflected. Greater diameter, 1^ mill.; height, \ mill. 



Helix asteriscus, Morse, Proc. Bost. Soc., VI. 128 (1857). 

 — W. G. Binney, Terr. Moll., IV. 103, PI. LXXVII. 

 Fig. 9 ; L. & Fr.-W. Sh., I. 82, Fig. 145 (1869). — Bland, 

 Ami. N. Y. Lye, VIII. 163, Fig. 8. — Morse, Amer. Nat., 

 I. 546, Fig. 43 (1867). —Gould and Binney, Inv. of Mass., 

 ed. 2, 415 (1870). 



Planoyyra asteriscus, Morse, Journ. Portl. Soc, I. 24, Figs. 50-52, PI. II. 

 Fig. 5 ; PI. VIII. Fig. 53 (1864). —Tryon, Am. Journ. Conch., II. 263(1866). 



From Gaspe to the north of Lake Superior, and through New England ; it 

 may therefore be considered a species of the Northern Region. 



Fig. 79. 



