214 PROCEEDINGS OF THE ACADEMY OF [Feb., 



EXPLAXATIOX OF PlaTES IX, X, XI. 



Plate IX, Figs. 1, 2, 3. — Polygyra 'pilshryi Ferriss. Topotype. 



Figs. 4, 5, 6. — Polygyra hlandiana Pils. {Helix labrosa Bland, not Wood). 



Type. Petit Jean Mountains, Yell county, Ark. 

 Fig. 7. — -Polygyra uncifera Pils. Cotype. Mena, Polk county, Ark. 

 Figs. 8, 9, 10. — Polygyra uncifera Pils. Rich Mountain, Polk county, 



Ark. 

 Figs. 11, 12, 13. — Polygyra hlandiana Pils. Cotype. Springfield, Green 



county. Mo. 



Plate X, Figs. 1, la, \h. — Vitrea clappi Pils. Three views of the tj^pe. Miry- 

 Ridge, Great Smoky Mountains. 

 Fig. 2. — Vitrea lamellidens Pils. Young individual from Thimderhead, 



diam. 1.4 mm. No. 77,752 A. N. S. P. 

 Figs. 3, 3a, 36. — V. lamellidens. Thunderhead. Diam. 3.5 mm. No. 



77,752 A. N. S. P. 

 Figs. 4, 4a. — F. walkeri Pils. Front and basal views of the type. 

 Fig. 5. — Vitrea walkeri Pils. Base of shell from Talassee Ford. No. 



77,703 A. N. S. P. 

 Fig. 6, 6a. — Vitrea midtidentata Binn. Basal and front views of a typical 



specimen from West Granby, Hartford county, Conn. No. 



57,104 A. N. S. P. 

 Fig. 7. — Vitrea multidentata Binn. Base of a specimen with the teeth 



united into an even barrier. Garrettsville, O. No. 66,858 A. N. 



S. P. 

 Figs. 8, 8a. — Vitrea clappi Pils. Openlv umbilicate specimen from Cling- 



man Dome. No. 2,490 Coll. G. H. Clapp. 



Plate XI, Figs. 1, lo, \h. — Vitrea placentula Shuttl. Philadelphia, Loudon, 



county, Tenn. No. 5,490 A. N. S. P. 

 Fig. 2. — Vitrea capsella Gld. Half-grown shell, diam. 3 mm. Wood- 



viUe, Ala. No. 68,820 A. N. S. P. 

 Fig. 3. — Vitrea capsella Gld. Young specimen with two pairs of internal 



teeth, diam. 2 mm. WoodvUle, Ala. No. 68,820. 

 Figs. 4, 4a, 4b. — Vitrea capsella Gld. Adult from Woodville, Ala., diam. 



4.5 mm. No. 68,820 A. N. S. P. 

 Figs. 5. 5a. — Vitrea capsella lacteodens Pils. Tuskeegee Mountain, 



Graham county, N. C, No. 77,798 A. N. S. P. 

 Figs. 6, 6a, 66. — Vitrea simpsoni Pils. Type. Limestone Gap, I. T. 



No. 61,676 A. N. S. P. 

 Figs. 7, 7a, 76. — Vitrea significans Bid. A fuUy adult specimen from 



Seligman, southwestern Missouri. No. 81,446 A. N. S. P. 

 Figs. 8, 8a. — Vitrea significans Bid. Young shell with internal teeth, 



diam. 3.8 mm. Same locality. 

 Figs. 9, 9a. — Vitrea andrewsce W. G. B. Half-grown shell from Roan 



Mountain, N. C, diam. 4.5 mm. 

 Fig. 10. — Vitrea andrewsce W. G. B. Younger sheU, diam. 3 mm. 

 Figs. 11, llo, 116. — Vitrea andrewsce W. G. B. Adult, Roan Mountain, 



N. C. No. 67,577 A. N. S. P. This and figs. 9, 9a and 10 are from 



specimens of the original lot, collected by Mrs. George Andrews. 



