264 EULIMID^E. 



Genus LOXONEMA, Phillips, 1841. 



Shell elongated, many-whorled ; aperture simple, attenuated 

 above, effused below, with a sigmoidal edge to the outer lip ; 

 spire interiorly septate. 



Like many other palaeozoic genera, the bad condition of many 

 of the species and the variation in form and sculpture render it 

 difficult to place it properly in a systematic work ; some of the 

 species might go into Turbonillidae, others appear closely allied 

 to Chemnitzia, and might even be synonymous with it. Michelia, 

 Romer, and Holopella, Sandberger (in part), are synonyms. 

 L. COSTATUM, Sandb. (Struct, and Syst. Conch., t. 68, f. 97). 



Genus STROBEUS, de Koninck, 1881. 



Shell small, smooth, spire sharp, of 5-7 convex whorls ; mouth 

 long-oval, outer lip sharp, inner lip callous, with an anterior fold. 

 Dist. 3 sp. Carboniferous, Belgium. 



Genus ORTHONEMA, Meek and Worthen, 1861. 



Shell elongate, many-whorled, with revolving carinse, crossed 

 by nearly straight growth-lines ; aperture angular above, slightly 

 effuse below, lip simple, nearly straight; axis imperforate. 



Devonian and Carboniferous, United States. 



Allied to Loxonema, but has distinct revolving carinae, and 

 wants the sigmoid outer lip of that genus. 



Genus RIGAUXIA, Qossmann, 1885. 



Shell narrowly elongated, nearly cylindrical, spirally striate; 

 aperture rounded in front, lip a little sinuous above, inner lip 

 thickened behind and separated from the columella in front by 

 a groove. Fossil, Bathonian. 



Genus CL1MACINA, Gemmellaro, 1878. 

 Shell imperforate, many-whorled, elongated, very finely longi- 

 tudinally striated ; aperture oval, rounded in front, lip simple. 

 C. CATHERINE, Gemm. Lias. 



Genus SUBULITES, Conrad, 1842. 



Shell fusiform, spire produced ; volutions convex, the last 

 large ; columella bent and truncated at the base, where it is 

 separated from the outer lip by a notch as in Achatina ; outer 



