188 PALEONTOLOGY OF KENTUCKY. 



ventricose. The surface is ornamented by ten to twelve strong, sharply ele- 

 vated, revolving lines, having a smaller one between them. On the upper half 

 of the body-whorl the stronger revolving lines have larger interspaces than 

 those on the lower half, but the lines in the interspaces are smaller above the 

 center of the volution than those below it. Between suture and the upper 

 carina or strong revolving line, there are four very fine revolving lines, only 

 indicated by the four rows of imbrications, which are there conspicuously 

 marked. These revolving striae are crossed transversely by irregular lamellose 

 lines of growth, to which the surface owes its finely .ornamented, somewhat 

 rugose appearance. 



Suture, owing to the great convexity of the volutions in their cross-sections, 

 deep and sharply marked. 



Apex and the first one or two volutions not known on account of the decol- 

 lated condition of the shell. Aperture supposed to be round ; form of base 

 and columella unknown. 



Prof. Hall states that this species bears considerable resemblance to Euom- 

 phalus carinatus of Sowerby, found in Europe in the Niagara group, from 

 which it differs by the smaller number of revolving carinae, and in the posses- 

 sion of the intermediate lines, as also in the character of the transverse 

 striae. 



Formation and Locality. In the Niagara strata of the different quarries east of the city of Louis- 

 ville, Ky. My illustration of this shell is a copy of Prof. Hall's, who made his from a not very good speci- 

 men in Dr. James Knapp's collection. That specimen was, for some time, the only one known ; but since 

 then I have found several myself. One of my shells is not at all distorted, showing three volutions in their 

 regular form, and with their surface ornamentation, except the markings on the lower half of the last 

 volution. 



Cyclonema multilira. HALL. 



Plate XXII., figure 5. 



Cychnema multilira, Hall. Descr. NewiSp. of Fossils, p. 20 1861. 



Ct/donema multilira, Hall. Fiteenth Rep. N. Y. State Cab. Nat. Hist., p. 481862. 



Ci/cJojiema multilira, Hall. Illustrations of Devonian Fossils, Gasteropoda, pi. 121876. 



Cyclonemu mullWra, Hall. Pal. N. Y., Vol. 5, pt. 2, pi. 121879. 



Shell medium size, pyramidal in outline, gently turbinate, with four increas- 

 ing volutions; suture line indistinct. On the surface of the volutions are 

 regular, prominent plications, and very broad sinuous furrows, winding par- 

 allel to the suture- line. Volutions begin sharply, but increase in diameter, 

 and become a little more ventricose. 



The description is based upon a very imperfect cast, in which the lip and 

 umbilicus are wanting. 



Formation and Locality. From the lower Devonian near Louisville, Ky. 



