562 PROCEEDINGS OF THE ACADEMY OF [Dec, 



Vitrea hammonis (Strom). 



Chadwick, Mo.; Magazine Mt., Logan Co., and Rogers, Benton Co., 

 Ark. Excessively fine spiral strise are visible on these specimens, in a 

 favorable light, under the compound microscope. In Eastern V. 

 hammonis they are generally absent. V. joetrophila may be distin- 

 guished from hammonis by its more numerous and more closely 

 coiled whorls. 

 Vitrea indentata (Say). 



Monett, Barry Co., and Chadwick, Christian Co., Mo. Rogers, Ben- 

 ton Co.; Magazine Mountain and Blue Mountain Station and Petit 

 Jean Mountain, Logan Co., Ark. Wyandotte, Vinita, Sugar-loaf 

 Mountain, South McAlester and Limestone Gap, Indian Territory. 



In the Territory the shells are distinctly perforate (var. umhilicata 

 'Singley' Ckll.), but are not quite so large as the Texan form. It is 

 liere, as in Texas, the commonest of the smaller zonitids, 



Vitrea petrophila (Bland). 



Arkansas: Magazine Mountain north of the summit, Logan Co. 

 It was found by Ferriss in 1900 at Mena, Polk Co., near the western 

 border of the State {Nautilus, XIV, 30). 



The specimens from Magazine Mountain differ from the types from 

 East Tennessee in being brown in color, like Zonitoides arborea, while 

 the typical form is of a pale corneous tint. There are fully 5^ whorls. 

 V. p. pentadelphia has but 4^. This species belongs to the section 

 Glyphyalinia. The westward extension of this species is unexpected. 

 It will probably prove to be more widely spread in the Carolinian area 

 than is now known. 

 Omphalina fuliginosa (' Griff." Binn.). 



Small, globose specimens were taken on the northwestern confines of 

 the Ozark area at Wyandotte, I. T., and Rogers, Benton Co., and 

 Poteau Mountain, south of Hartford Station, Sebastian Co., Ark. 

 From the shells alone it would be difficult to decide upon the species, 

 but the soft anatomy is certainly nearer fuliginosa than friahilis. 



Omphalina fuliginosa ozarkensis n. subsp. 



The shell is light and thin, varying from dusky olive to olive-chestnut, 

 dusky near or at the lip. The surface is indistinctly marked with fine 

 spiral strise. Whorls 4h, the earlier ones invariably worn and white or 

 whitish. The mantle is pale gray, the branches of the vena cava black, 

 pulmonary vein and its branches not pigmented. 



Alt. 16 13 mm. 



Diam. 23.3 21.5 " 



