4 PROCEEDINGS OP THE ACADEMY OP 



soft parts of the four species mentioned first shall be examined, they will, I 

 think, be found to differ from Goniobasis, Trypanosoma and Lithasia, to which 

 genera they seem nearest allied. The operculum of the only one I have seen, 

 ffibberosa, is the same as Goniobasis and the Melanidse generally. 



Goniobasis Albanyensis. Testa granulata, conicS,, subtenui, luteo-olivacea ; 

 epira subelevata ; suturis irregulariter impressis ; anfractibus instar senis, 

 planulatis, superne iuterdum plicatis, inferne striatis ; apertura, grandiuscula, 

 ovata, intus albida ; labro acuto, vix siuuoso ; columella aliquantd inflecta et 

 contorta,. 



Operculum subrotund, light-brown, very thin, polar point on the left, near 

 the middle. 



Hab. Near Albany and Blue Springs, Baker County, Georgia, Rev. G. 

 White. 



Goniobasis yiiudostriatis. Testa virido-striata, fusiformi, subtenui, luteo- 

 olivacea, ; spira, obtuso-conica, ; suturis irregulariter impressis ; anfractibus 

 instar quinis, convexiusculis, superne granulatis, inferne striatis ; apertura 

 parviuscula, ovata, intus vittata ; labro acuto, vix sinuoso; columella aliquantd 

 inflecta et contortd. 



Operculum subrotund, very small, very thin, light-brown, with the polar 

 point on the left near the middle. 



Hab. Flint River, Georgia, Bishop Elliott and Mr. Gesner. 



Trypanostoma subrobpstum. Testa laevi, pyramidata,, tenebroso-cornea, 

 crassa ; spirit pyramidata, elevata ; suturis impressis ; anfractibus instar no- 

 venis, planulatis; apertura, parva, rhomboidea; labro acuto, valde sinuoso; 

 columella incrassata et valde contorta. 



Operculum ovate, dark-brown, with polar point near the base of the left side. 



Hab. Holston River at Knoxville, E. Tennessee, Major S. S. Lyon, U. S. E. 



Trypanostoma Roanense. Testa, laevi, obtuso-conica, crassa, vittata vel 

 evittata ; spira obtusa ; suturis impressis ; anfractibus planulatis, subsuturis 

 tumidis ; apertura parviuscula, rhomboidea ; labro acuto, sinuoso ; columella 

 albida, incrassata et valde contorta. 



Hab. Roane County, E. Tennessee, Major S. S. Lyon, U. S. E. 



Trypanostoma Lesleyi. Testa tuberculata, pyramidata, tenebroso-corne& ; 

 spira, elevata ; suturis irregulariter impressis ; anfractibus instar octonis, sub- 

 impressis ; apertura parviuscula, rhomboidea, intus albida, interdum vittata; 

 labro acuto, valde sinuoso ; columella incrassata. 



Operculum ovate, dark-brown, rather thin, with the polar point near the 

 base. 



Hab. East Tennessee, Prof. Troost. Smith's Shoals, Cumberland River, 

 E. Tennessee, Major S. S. Lyon, U. S. E. ; and Pulaski Co., Kentucky, Joseph 

 Lesley, C. E. 



Trypanostoma affine. Testa, canaliculate, pyramidata, cornea; epira 

 valde elevata ; suturis irregulariter impressis ; anfractibus instar novenis, 

 canaliculars, supra, planulatis ; apertura rhomboidea, intus albida vel vit- 

 tata, ; labro acuto, sigmoideo ; columella incrassata et valde contorta. 



Hab. Smith's Shoals, Cumberland River, E. Tennessee, Major S. S. Lyon, 

 U. S. E. 



Trypanostoma cylixdraceom. Testa, laevi, cylindracea, subcrassa, vittata 

 vel evittata ; spira subelevata ; suturis irregulariter impressis ; anfractibus 

 planulatis, leviter impressis, subsuturis tumidis ; apertura, parviuscula, rhom- 

 boidea ; labro acuto, aliquantd sinuoso; columella incrassata, incurvata, et 

 contorta. 



Hab. Roane County, E. Tennessee, Major S. S. Lyon, U. S. E. 



Trypanostoma carinatom. Testa carinata,, acuto-conica, rufo corned, tenui 



[Jan. 



