SCHIZOSTOMA. 357 



Mr. Reeve, and Dr. Brot following him, place ovoideum, 

 Shuttleworth, in the synonym}' of this species. As I have no 

 means of comparing specimens of the latter with Mr. Lea's 

 species, I have preferred to separate them in this work. 



S. Babylonicum is a larger, wider, more robust species than 

 the one now under consideration. 



5. S. pumilum, Lea. 



Schizostoma pumilum, Lea, Proc. Acad. Nat. Sci., p. 187, May, 1860. Jour. Acad. 



Nat. Sci., V, pt. 3. t. 3.1, f. 57, March, 18G3. Obs., ix, p. 74. 

 Gyrotoma pumila. Lea, Binnev, Check List, No. 3-28. Bkot, List, p. 27. 

 Schizostoma globosum, Lbia, Proc. Acad. Nat. Sci., p. 187, May, 1860. Jour. Acad. 



Nat. Sci., V, pt 3, t. 3.j, f. 68, March, 1833. Obs., ix, p. 74. 

 Gyrotoma globosa. Lea, Binxey, Clieck List, No. 321. Bkot, List, p. 27. 

 Melatonin globosum, Lea, Reeve, Monog. t. .3, f. 18. 

 Melatoriia Alabnmense, Lea, of Reeve, Monog. sp. 20. 

 Slelatoma Showalterii, Lea, of Reeve, Monog. sp. 23 ? 



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 thicliened below ; outer lip acute and sinuous. 



Habitat.— A] ahSLma.; B. W. Budd, M.D. 



Diameter, -40; length, -63 of an inch. 



Observations. — Tliis is a rather small, dwarfish 



looking species, nearly as wide as it is long, which 



I have had *for a long time from Dr. Budd. One of 

 Fig. 678. Fig. G79. 



the si^ecimens has a few obscure bands. It is nearly 



allied to glandula (nobis), but the spire is higher, and 



it is striate, while the other is not. It is not lilvcly 



to be confounded with (jlnns (nobis), as that is a large 



species with a higher spire. The hem-lilie line left by the lip-cut is 



large and well defined round the whorls. The aperture is about half 



the length of the shell. One of the specimens before me has three 



indistinct bauds. The other two have none. — Lea. 



Having before me a number of specimens of Mr. Lea's 

 S. pumilum and of his S. globosum., I am convinced that the 

 latter is aji immature form of the former species. The accom- 

 panying figures, the largest of which agrees well with Mr. 



