niiSCKll'TlONN ul- INVERTEBRATE lOsMI.S. <)3 



smooth, or marked fnilywitli ordinary ii^rowth-liiirs; aperture 

 obliquely and rather narrowly ovate; inner lip with a callous, 

 stronfT^ly flattened, and without teeth; outer lip with a moder- 

 ate, shallow, broadly rounded excavation just l)elow the peri- 

 pheral line. No umbilicus. The uneroded [)ortion of the 

 spire rises but little above the body-whorl. 



Measurements. — Height 10, breadth 10.5 mm. Costella? 

 of body-whorl, about 3 in 2 nun. A Belvidere example col- 

 lected a few years a^o, and not at hand for measurement, is 

 somewhat larger than the type-specimen from which these 

 dimensions are taken. 



Occn rrence. — In the Kiowa shales of Kiowa county, Kansas, 

 in No. 8 and the upper part of No. 4 of my Belvidere section. 

 In the past ten years, the writer has collected several speci- 

 mens of this shell, of which two or three were obtained at 

 Belvidere; and one, of probably — though he cannot say posi- 

 tively — the same sj^ecies, in limestone-bands in these shales, 

 just west of Windom, McPherson county, Kansas. 



This adds another shell of Jurassic type to the fauna of 

 the Pre -Washita part of Hill's Comanche series. 



The species is named in honor of Mr. Jules IVfarcou. 



Solarium chickasaense, sp. nov. 



Shell rather small, discoidal, slightly concave above, more 

 so below; whorls five, all exposed above and (probably all) 

 below, in contact and slightly embracing, inequilaieraUy 

 rounded-sub(iuadrate in cross-section, broader than high, 

 flattened above, the upper surface of each whorl dropping a 

 little lower than that of the whorl next outside of it, the 

 superior suture distinct, inferior surface of body-whorl raised 

 into a somewhat prominent rounded shoulder, periphery of 

 body-whorl rounded; cross-section of cavity near aperture 

 oblique, inecpiilaterally ovate, or rounded-triangular, trans- 

 verse (that is, broader than high), but far less so than in 

 Roemer's Solarium planorbis, outline of the cavity and that 

 of the exterior of the shell in the cross-section not parallel 

 with each other, the shell being relatively much thickened at 

 the corners; upper side of whorls marked with ordinary 



