244 LAND AND FRESH-WATER SHELLS OF N. A. [PART IV. 



received among a large number of mollusca from Dr. Spillman. It 

 reminds one of Melania {Goniohasis) corneola, Anth., but it is a large 

 Fig. 475. ^^^^ more robust species, and has not the pllciE of that species. 



^ft. It has also affinities to Melania {Goniobasis) fusiformis (nobis), 

 ffl^j but differs in color, has a higher spire and a less incurved col- 



^^ umella. The specimen of anricoma before me has four bands, 

 the three lower ones are broad, equidistant and not very distinct. 

 The upper one is more distant and very indistinct. Under the micro- 

 scope may be observed in this specimen numerous, very minute, im- 

 pressed revolving lines. The aperture is little more than half the 

 length of the shell. — Lea. 



137. G. glabra, Lea. 



Melania glabra, Lea, Proc. Acad. Nat. Sci., ii, p. 82, Oct., 1841. Philos. Trans., ix, 

 p. 18. Obs., iv, p. 18. Wheatley, Cat. Shells U. S., p. 25. Binney, Check List, 

 No. 123. Brot, List, p. 38. Reeve, Monog. Melania, sp. 439. 



Description. — Shell smooth, conical, rather thin, shining, dark 

 chestnut color; spire rather elevated; sutures slightly impressed; 

 whorls rather flattened; aperture elongated, trapezoidal, purplish 

 within ; columella incurved. 



nahitat. — Holston River, East Tennessee. 



Diameter, '32 ; length, -70 of an inch. 



Observations. — The apex in all the specimens before me is slightly 

 eroded, and therefore the number of the whorls cannot be Fig. 476. 

 accurately ascertained ; it may be six or seven. The aperture 

 is more than one-third the length of the shell. The superior 

 whorls are disposed to be carinate, and below the sutures the 

 color Is lighter. The columella is much incurved. Within 

 the aperture, indistinct, confluent bands may be observed. These are 

 scarcely observable without, but give the shell a very dark aspect, 

 somewhat like M. rufa (nobis). It is very difi"erent, however, in form 

 from that species. — Lea. 



138. G. gibbosa, Lea. 



Melania gibbota, Lea, Philos. Proc, ii, p. 34, April, 1841. Philos. Trans., x, p. 301, 

 t. 30, f. 12. Obs., V, p. 57, t. 30, f. 12. Binney, Check List, No. 121. Brot, List, 

 p. 40. 



Description. — Shell smooth, obtusely conical, gibbous, subfuslform, 

 rather thin, greenish horn-color ; spire obtuse ; sutures irregularly 



