~MOLLUSCA. 62 
~I 
Polygyra couloni (p. 167). 
To the localities given, add :— 
Hab. [E. Mexico :| Quilate, near Misantla (Hége). 
Polygyra bicruris (p. 168). 
Polygyra bicruris, Rolle, Nachrichtsbl. deutsch. malak. Ges. 1895, p. 180%. 
To the localities given, add :— 
Hab. 8.W. Muxico: Colima (Rolle 4). 
Polygyra richardsoni (p. 168). 
Polygyra richardsoni, Rolle, Nachrichtsbl. deutsch. malak. Ges. 1895, p. 1307. 
To the localities given, add :— 
Hab. 8.W. Mexico: Colima (Rolle 1). 
Polygyra acutedentata (p. 172). 
Helix (Polygyra) unguifera, Mousson, Journ. de Conch. xxxi. p. 216, t. 9. fig. 1 (1883)"; Fischer 
& Crosse, Miss. Scient. Mex., Moll. ii. p. 665, t. 71. figg. 11, 11 a, 5". . 
The following species are unknown to me :— 
18. Polygyra nelsoni. 
Polygyra nelsoni, Dall, Nautilus, xi. p. 74 (1897) *. 
Hab. W. Mexico: San Sebastian, Jalisco (EZ. W. Nelson 1). 
19. Polygyra rhoadsi. 
Polygyra rhoadsi, Pilsbry, Proc. Ac. Phil. 1899, p. 392°. 
Hab. N.E. Mexico: Topo Chico, near Monterey, Nuevo Leon (Mr. & Mrs. Rhoads 1). 
Closely allied to P. implicata. 
20. Polygyra suprazonata. 
Polygyra suprazonata, Pilsbry, Proc. Acad. Phil. 1899, p. 893 * 
Reddish-brown, with a wide whitish band along the periphery. 
Diam. 10-2-12, alt. 5°7-6-5 millim. 
Hab. Centran Mexico: Tzintzuntzan, State of Michoacan (Mr. & Mrs. Rhoads '). 
21. Polygyra matermontana. 
Polygyra matermontana, Pilsbry, Proc. Acad. Phil. 1896, p. 16, t. 3. figg. 10-12". 
Hab. S.W. Mexico: Sierra Madre Mountains, Colima’. 
Also stated to occur in Texas}. 
7° 
