THE NAUTILUS. 125 



lower being the smaller of the two, and two on the outer portion of 

 the peristome, more deeply Beated in the throat, aud occasionally 

 one or two very minute rudiments on the peristome. Length 1.56, 

 diam. 84 mm. This shell is found on both sides of the Ohio River, 

 near Cincinnati." (Judge, The Quarterly Journ. of Conch., p. .'543, 

 1878.) 



" Pupilla jioridana Dall. * * * subcylindrical * * * teeth 

 about 9, of which there are generally 3 larger than the rest, their 

 tips nearly meeting and their bases mutually nearly equidistant ; one 

 is on the pillar, one on the body-whorl, and one on the anterior mar- 

 gin ; on either side of the latter are two generally subequal, much 

 smaller denticles. Lon. 1.6, hit. .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. 



" Pupa montanella. A minute Leucochila which 1 have found 

 very sparingly at about 8400 feet in West Custer Co. (Colorado), to 

 which I have given the name P. montanella sp. now, but do not 

 describe it pending further investigations." (Ckll., The Journ. of 

 Conch., Leeds, Vol. vi, 1889, p. 63.) 



" P. montanella, indicated on the same page as P. coloradenst's, 

 proves to be a form of P. pentodon." (Ckll., The Brit. Nat,, 1891, 

 p. 101.) 



Since no definition of any kind has been published, this name 

 becomes an absolute synonym of B. pentodon. 



" Papa curvidens var. gracilis. On a gravelly bank at New Phil- 

 adelphia, Ohio, there is a peculiar form of our species ; long, slender, 

 nearly cylindrical, with only 5 typical lamellae, no accessory ones. 

 * * * 1 thought it not out of place to name it var. gracilis." (Dr. 

 V. Sterki, Nautilus, iii, 1890, p. 119.) 



" Pupa curvidens gracilis Sterki. Scarce. New Philadelphia. A 

 peculiar form intermediate in shape between the type and Pupa 

 holzingeri Sterki. It has also been seen from Rhode Island, Ten- 

 nessee and Alabama." (Sterki, The Land and Fresh-water Mollusca 

 in the Vicinity of New Philadelphia. A contribution to the Nat. 

 Hist, of Tuscarawas Co., Ohio, 1894.) 



" Pupa pentodon f. curia. Examples from wet places are small 



