14 Calvin Goodrich 



The known range for the species is from The Bar, Chilton County, to 

 Wetumpka, Elmore County. 



Lea speaks of wetumpkaensis as umbilicate. This is merely an effect of 

 erosion. Sometimes the animal leaves a chink close to the border of the colu- 

 mella and the opening is widened irregularly by corrosion. Three lots of 

 w&tumpkaensis in the Lea collection agree very well with pagoda, though 

 less carinated and having color bands. Ornata is a young shell. The locality 

 given, North Carolina, is apparently, as Tryon points out, a confusion with 

 Anculosa ornata Anth. from that state. Dr. Walker examined the type of 

 anthonyi in the British Museum and found it to be identical with pagoda. 

 Lewis (5, p. 23) suggested the possibility of zvetumpkaensis being a variety 

 or the young of pagoda. 



Gyrotoma pumilum (Lea) 

 PI. I, figs. 10 and 11 



Schkostoma pumila Lea, Proc. Acad. Nat. Sci., Phila.. XII, i860, p. 187: Journ. 

 Acad. Nat. Sci., V, n. s., 1862, p. 252, pi. 35, fig. 57; Obs. Gen. Unio, IX, 1863, p. 74, 

 pi. XXXV, fig. 57; Lewis, Amer. Journ. Conchol., V, 1869-70, p. 169; Trj'on, ;Monog. 

 Strepom., 1873, p. 357; Lewis, Fauna of Ala., 1876, p. 23. 



Gyrotoma pumila Lea, Binney, Check List, i860, No. 328; Brot, List, 1862, p. 27. 



Gyrotoma olivula excisa (Lea), Hannibal, Proc. Malacol. Soc, X, 1912, p. 182. 



Melatoma Alabamense Lea. Reeve. Monog. Melatoma. 1861, sp. 20. 



Schkostoma ^lobosa Lea, Proc. Acad. Nat. Sci.. Phila.. XII, i860, p. 186; Journ. 

 Acad. Nat. Sci., Phila.. V, n. s., 1862, p. 2^2, pi. 35;, fig. 58; Obs. Gen. Unio. IX. 1863, 

 p. 74, pi. XXXV, fig. .t^8; Lewis, Amer. Journ. Conchol., V, 1869-70, p. 168. 



Schkostoma exckum Lea, Hinckley, Nautilus, XVIII, 1904, p. 41. 



Gyrotoma globosa Lea, Binney, Check List, i860. No. 321; Brot, List, 1862, p. 27; 

 Paetel, Cat., 1888, p. 362. 



Melatoma globosum Lea, Reeve, Monog. Melatoma, 1861, sp. 18. 



Description: Shell striate, top-shaped; rather thin, pale horn-color, imperforate; 

 spire very obtuse; sutures much impressed; whorls six, ventricose, the last very large; 

 fissure straight and rather short; aperture rather small, ovate, white within, angular 

 at the base and somewhat canaliculate ; columella white, twisted and thickened below ; 

 outer lip acute and sinuous. 



Habitat : Alabama ; B. W. Budd, M. D. 



Diameter, .40; length, .63 of an inch. — Lea. 



The fissure of pumilum is "rather short" only as compared with the 

 character in such species as excisum. It may be considered as moderately 

 deep for the genus. It is narrow, usually straight, rarely slightly oblique. 

 In Wetumpka specimens examined, this slit has a maximum depth of 7 1-2 

 mm., in a specimen from Higgin's Ferry, it is 9 1-4 mm. deep. The girdle 

 is more marked in some specimens than in others, vaiying also in color 

 and size. Cross sections showed the girdle to be hollow for about 3 or 4 

 mm. behind the fissure. Behind this hollow space it was filled with fine 

 crystalline shell material. 



The adult is ovate, with whorls slightly convex, the base rounded ; often 

 very heavy. The spire in partly grown shells is obtuse, with faint plicae, 

 often missing. The largest Wetumpka specimen measures i8j4 >^ H/^ 

 mm., the largest up-river shell, 22 x 12 mm. Ten or twelve revolving folds 

 appear on the body whorl in Wetumpka lots, tending to disappear in colonies 



