OPOD4 



BHIrn.pJ. 



(emend.. Waagenf). Shell more or less globular or lenticu 

 i ..mid. -.1. eml>raciii so that there is no umbilicus; aperture not abruptly 

 expanded. with the outer lip hilohed. the central insinuation moderately deep and 

 rat I: ml wide, defined mi each side by a thin or thicker ridge; inner lip 



-nnii'what calloiH iii it- hiteral parts, while the central portion spr. e.lf as a 



thin, loii;_'itii'lma!l v folded sheet over the inner volutions. These revolving ridges, 

 or. as \Vaagen calls them, columellar folds, extend a greater or less distance beyond 

 the aperture, in some cases reaching a point half around the last whorl. Ueyond 

 them to tln> outer edge of the aperture the surface usually appears smooth, but in 

 perfectly preserve'! specimens it presents very fine lines of growth running parallel 

 with the outline of the aperture. Type, K. urii Fleming sp. 



Both McCoy and Waagen deny the existence of a slit-band, but Koken maintains 

 (op. '-if., p. :!!(3) and, so far as the American species are concerned, we have material 

 before us which permits us to sustain his assertion with absolute certainty that it 

 was always present. That it often, indeed generally, appears to be absent is due to 

 the extreme liability of the outer or sculpture bearing layer of the shell to destruc- 

 tion, while on the inner volutions it is covered by the revolving columellar folds. 

 For further remarks see under Mogul ia ( page 856. ) 



AV 



K. (BtUenptum) carbonariu* Cox. Coal Meas. E. (Bellerophon) modocarinatui Hall. Coal Meas. 



FOREIGN SPKCLEH. 



E. (BtUsrvpton) mrtoiynyamu Portlock. Carboniferous. Europe. 



:ngp. Carboniferous. Europe. 

 idicut Waagen. !' rui'.-Carbonifrrniis. India. 

 JR. npertut Waagen. Pertuo-Carb<.nif<Tus. India. 

 E. laeri* Waagen. IVrtno-Cart>onlfTous. India. 

 X. Imtifulari* Waagen. Permo-Cart* India. 



WABTHIA. Waagen. t Smooth glolmlar non-umbilicated shells, with a broad 

 and rather deep rounded sinus in the outer lip, but without either a slit or slit-band. 

 Inner lip only very slightly thickened, not extensive nor spreading (as in 

 Prototcurthin) over the umbilical regi""-. Aperture without lateral expansions. 

 No revolving 1 m> of growth very indistinct. Type, W. polita Waagen. 



This genus is readily <listinpiisln"l from fklUrophon hy the lu-eadth of the 

 sinus in the outer lip and the entire absence of a slit-hand. It is however singu- 

 larly like the early Paleozoic group of shells for which we have created the gemi< 

 Protmcarihia. For comparisons and remarks on the probable significance of this 

 and the preceding genus see below under Monulin. So far as known HVi ;///// 

 is not represented in American ~tr.it. t. Waagen describes three species from the 



r"P- Carb. K". Inland, p. ; Ml 



Indloa. Mr. 13. pt. 1. pp. Ul. Id. 

 : l'; Iodlr. Mr . u. pi 3. pp. 111. 1>; MO. 



