GASTROCOPTA, NORTH AMERICA, WEST INDIES. 31 



side of the latter are two generally subequal, much smaller 

 denticles. Lou. 1.6, lat. .75 mm. Archer, Alachua Co., Fla." 

 (Dall, Proc. U. S. Nat. Museum, vol. 8, 1885, p. 261, pi. 17, 

 f. 11.) 



The figure seems to have two teeth on the parietal wall, 

 two on the columella and five in the palatal region. This is 

 practically identical with the arrangement described under 

 curvidens. 



Since no definition of any kind has been published, P. mon- 

 tanella Ckll. becomes an absolute synonym of B. pentodon. 

 The following notices of it have appeared : 



"Pupa montanella. A minute Leucochila which I have 

 found very sparingly at about 8400 feet in West Ouster Co. 

 (Colorado), to which I have given the name P. montanella 

 sp. nov., but do not describe it pending further investiga- 

 tions." (Cocker ell, The Journ. of Conch., Leeds, vol. vi, 

 1889, p. 63.) 



"P. montanella, indicated on the same page as P. colora- 

 densis, proves to be a form of P. pentodon. ' ' ( Cockerell, The 

 Brit. Naturalist, 1891, p. 101; re-affirmed also in Univ. of 

 Colo. Studies, iv, p. 171.) 



In Mexico I have seen G. pentodon from a canyon four 

 miles west of Victoria, Tamaulipas (S. N. Rhoads), and bluffs 

 north of San Dieguito, S. L. Potosi (A. A. Hinkley). In 

 Guatemala it was found by Mr. Hinkley at Jocolo. The speci- 

 mens are typical. These localities show that the species has 

 an extraordinary zonal range. It is found over a greater 

 area than any other North American Gastrocopta. 



4a. G. pentodon gracilis (Sterki). PL 4, figs. 16 to 27. 



"On a gravelly bank at New Philadelphia, Ohio, there is a 

 peculiar form of our species; long, slender, nearly cylin- 

 drical, with only 5 typical lamella*, no accessory ones" 

 (Sterki, 1890). 



"Pupa curvidens gracilis Sterki. Scarce. New Philadel- 

 phia. A peculiar form intermediate in shape between the 

 type and Pupa holzingeri Sterki. It has also been seen from 

 Rhode Island, Tennessee and Alabama" (Sterki, 1894). 



