420 TRANSACTIONS OF THE WAGNER FREE 



Miocene of Duplin Co., N. Car, Burns; Pliocene of the Caloosahatchie 

 River, Florida, and of the Cape Fear River, N. Car. ; recent on the South- 

 eastern coast of the United States from Hatteras to Florida, low water to 15 

 fathoms. 



It is uncertain whether Holmes's species is identical with the recent shell 

 and Pliocene fossils. The latter agree perfectly in being less elevated than 

 Holmes's figure and in having more spiral sculpture. It is possible that his 

 specimen was exceptional or his figure inaccurate, but, in the absence of his 

 type, I do not feel authorized to definitely unite them. They are in any case 

 closely related species. The North Carolina specimen was collected by Mr. 

 Johnson at Mrs. Purdy's marl-pit on the Cape P"ear River. The evidences of 

 a possible mi.Kture of Pliocene and Miocene at this place are so strong that the 

 age for the present cannot be decided. 



The type of Gabb's Adeorbis carinata is an Episcynia somewhat resem- 

 bling the present species. It is, however, more probably identical with the 

 type of the subgenus V. (E) mornata Orb. 



Genus OYOLOSTREMA Marryat. 



Cyclostrema chipolanum n. s. 



Plate 22, figure 35. 



Older Miocene of the Chipola beds at Bailey's Ferry, Chipola River, 

 Calhoun County, Florida, Burns. 



Shell small, turbinate, with three or four rounded whorls ; nucleus small, 

 smooth, subsequent whorls sculptured with (between the sutures three) eight 

 prominent spiral ribs with wider channelled interspaces crossed by well- 

 marked lines of growth which are occasionally almost lamellose ; suture dis- 

 tinct, not channelled, though the whorl in front of it is a little tabulated by 

 the upper spiral rib ; basal surface sculptured like the spire ; aperture circular, 

 expanded at the margin ; pillar-lip thin; the space between it and the lowest 

 spiral rib is excavated, but there is no umbilical perforation. Alt. of shell 

 2.25 ; diam. 2.3 mm. 



This is a well-marked and characteristic little shell, notable for its bold, 

 strong yet simple sculpture. 



Genus MOLLERIA Jeffreys. 



This genus differs from Cyclostrema in having the operculum more or less 

 calcareous, and the aperture supplied, just within the margin, with a projecting 

 edge or shelf against which the edge of the operculum fits. By this rim or 

 ledge fossil specimens may be recognized, even if there is no operculum 

 present. Under Adeorbis the reader will find one or two species referred to 

 which, perhaps, would more appropriately find a place here, but without a 

 greater amount of material for study I have hesitated to transfer them. 



