4 University of MicJiigan 



Types No. 38508 Coll. Walker. Cotypes in the collections 

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

 of Zoology, Univ. of Mich. 



This species is well characterized by its elevated, conical 

 spire and acute apex. At first sight it looks like an enlarged 

 edition of the preceding species, but it differs in the greater 

 elevation of the spire and acute apex as well as in size. The 

 obese form found with it (fig. 4) measures alt. 3, diam. 2.25 

 mm. 



IV 

 Amnicola hinkleyi n. sp. PI. I, fig. 6. 



Shell turreted conic, narrowly umbilicate, greenish horn 

 color, smooth and shining ; spire elevated, conical ; whorls 5, 

 convex, separated by a deep suture, apex somewhat obtuse, 

 body-whorl ventricose, about as long as broad ; aperture sub- 

 circular, slightly flattened on the outer margin ; inner margin 

 of the peristome thin, appressed to the body whorl for a short 

 distance above the umbilicus. 



Alt. 5.25, diam. 3.5, aperture alt. 2.5 mm. 



Reservoir north of Guatemala City, Guatemala. 



Types No. 47162 Coll. Walker. Cotypes in the collections 

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

 of Zoology, Univ. of Mich. 



This is one of the largest species yet recorded from Guate- 

 mala. It seems to be more closely allied to the Mexican 

 A. orisahensis C. & F. than to any of the described Guatem- 

 alan species. It dififers from that species in being narrowly 

 umbilicated, less inflated and with a more elevated spire. The 

 obese form found wnth it measures alt. 4.5, diam. 3.25 mm. 

 and as usual has a slightly wider umbilicus. 



