ACADEMY OF NATURAL SCIENCES. 337 



28 exarata Pfeiff. (Not of Weigm. = caelatura Fer.) Wh. 6 to 7, yel- 

 low, or olive and brown mixed, strongly wrinkled, faintly malleate ; diam. 0.75 

 to 1.15, axis 0.40 to 0.62. 



29 ramentosa GUI. Wh. h}/ z to 6}4, yellowish brown, thin, oblique 

 grooved, sometimes wrinkled ; diam. 70 to 1.30, axis 0.57 to 0.90. 



30 reticulata Pfeiff. " Wh. 5 %, reddish brown, band single, sculpture 

 like 29," (probably a var.) ; diam. *0.85, axis 0.47. 



31 tudiculata Binn. Wh. 5 to 5}Z, brown or olive, band wide, paler 

 margined, malleate, body whorl swollen ; diam. 0.90 to 1.40, axis 0.45 to 0.80. 



XII Group. (" Polymita" Tryon, part, " Arianta" Albers. part.) 

 Sub-globose conic ; axis, 0.6 to 0.8 diam. ; band single, obscure, 

 or none, often mottled ; smooth or with revolving grooves, sub- 

 imperforate. Usually paler below. 



32 Kellettii Forbes. Wh. 5, reddish with pale mottling in bands, faint 

 revolving or oblique grooves ; diam. 0.72 to 1.20, axis 0.48 to 0.68. 



33 crebristriata Newc. Wh. 5, dark corneous, band obscure or none, 

 lip sometimes continuous ; diam. *0.92, axis 0.55 to 0.80. 



34 intercisa W. G. Binn. Wh. 5, grayish or brown, band obscure, 

 deeply grooved, lip thick, continuous, tubereled; (=33 var.?) diam. *0.84, 

 axis 0.57. " Hub. probably San Miguel I." Newcomb, from worn specimens 

 in his museum, not " Oregon." 



35 Tryoni Newc. Wh. b% to 6, bluish or mottled, pale below, band 

 faint, lower lip sometimes tubereled ; diam. *0.80, axis 0.55. 



36 Carpenteri Newc. Wh. 5}.<, brownish white, band faint, fine re- 

 volving grooves, mouth subcircular ; diam. " x 0.90, axis 0.64. 



37 ? Rowellii Newc. " Wh. 4}^, opaque white, no band, or sculpture" 

 (bleached?), mouth subcircular, umbilicate; diam. *0.60, axis 0.40. (Unique 

 specimen, and may be of the Mexican group, like lavis, etc.) 



" Arianta" Remondii Tryon, and " Galaxias " griseola and Berlandieriana, 

 of Mexico, seem to connect this group with the next. 



ff Band triple, colors strongly defined. 



XIII Group. (Aglaia Alb. part.) Generally lower than group XII, 

 and lip more expanded, umbilicus large or moderate, with revolv- 

 ing grooves, or smooth. 



% Colors light, often palest below. Inhabit dry or treeless regions, 

 from lat. 32° to 36°. 



38 facta Newc. Wh. 5 to b}4, white, or brownish above, lip yellow, 

 umbil. nearly covered ; diam. *0.42, axis 0.22. 



39 Gabbii Newc. Wh. 5, band margins and grooves obsolete ; (unique, 

 between 38 and 40 ;) diam. *0.40, axis 0.20. 



40 rufocincta Newc. Wh. 5 to 6, pale brown, depressed, umbil. mode- 

 rate, lip broad ; diam. 0.50 to 0.85, axis 0.22 to 0.45. 



41 Traskii Newc. Wh. 6 to 6)4, like last, but umbil. larger, lip thinner, 

 usually higher; diam. 0.90 to 1.00, axis 0.40 to 0.62. 



