Occasional Papers of the Museiiin of Zoology 3 



II 



Amnicola panzosensis n. sp. PI. I, figs. 2-3. 



Shell small, ovate-conic, narrowly umbilicatc, horn color, 

 smooth and shining; whorls 4, the apical one small the remain- 

 der regularly increasing, body-whorl longer than broad; 

 sutures well impressed ; aperture ovate, slightly flattened on 

 the basal margin; lip sharp, inner margin of the peristome 

 adnate to the body-whorl. 



Alt. (type fig. 2) 2.75, diam. i. 75, aperture alt. 1.25 mm. 



Panzos, Guatemala. 



Types Xo. 37387 Coll. Walker. Cotypes in the collections 

 of A. A. Hinkley, the Philadelphia Academy and the ^Museum 

 of Zoology, Univ. of ]\lich. 



This diminutive species is one of the smallest yet recorded 

 from Central America. The A. costaricoisis Alorch from 

 Costa Rica (2 x 1.5 mm.) and A. tryoni Pils. from Nicaragua 

 {i.Tf X 1.6 mm.) are smaller. The obese form found with it 

 (fig. 3) measures alt. 2.4, diam. 1.75 mm. and has a slightly 

 wider umbilicus. 



Ill 



Amnicola conchensensis n. sp. PI. I, figs. 4-5. 



Shell ovate-conic, umbilicate, horn color, smooth and shin- 

 ing; spire elevated, conical; whorls 5, regularly rounded, with 

 a well impressed suture, apical whorl small and projecting, 

 body-whorl longer than broad ; aperture broad oval, slightly 

 flattened on the basal margin ; lip sharp, inner margin of the 

 peristome adnate to the body-whorl; umbilicus narrow. 



Alt. (type fig. 5) 3.5, diam. 2.5, aperture alt. 1.6 mm. 



Cochens River, Guatemala. 



