FORMATIOlSrS AND FOSSILS OF SOUTH MAlsrCHURIA 59 



Genus SOLENOSPIRA Ulrich, 1908 



SOLENOSPIRA species undetermined 

 PlATE 29, FiGXntE 7 



Among the material collected from the Kangyao formation is one 

 fragmentary specimen of a gastropod (U.S.N.M. No. 83665) that 

 has depressed volutions and a somewhat channel-like spiral band with 

 two salient thin ridges, therefore being safely referable to Soleno- 

 spira. 



This fragmental shell has the general form and characters of 

 Solenospira prisca (Billings), from the Stones Eiver of the United 

 States, but it is too fragmentary to identify exactly as that species. 



Formation and locality. — ^Lower Ordovician, Kangyao formation: 

 In the black-banded limestones near Shang-kang-yao, 3 miles south 

 of Yen-tai colliery, Liao-tung, Manchuria. 



Genus ECCYLIOPTERUS Remele, 1888 



ECCYLIOPTERUS LOUDERBACKI. new species 

 Plate 36, Figtoies 10-13 



Description. — ^Width, 23 mm ; greatest height, nearly two-thirds of 

 the width ; whorls, three in number, enlarging rather rapidly, coiled 

 very nearly in the same plane ; upper side of shell broadly concave ; 

 umbilicus comparatively large, about one-third the diameter of the 

 shell ; under side of whorls strongly convex, outer side sloping slightly 

 inward; suture deep, collar somewhat prominent, well indicated; 

 mouth somewhat acuminate quadrilateral, very oblique. Lines of 

 growth curving strongly backward toward the marginal collar. 



Comparison. — This species is related to E. heloitensis Ulrich and 

 Scofield, from the Stones River, but is distinguished by a more acute 

 collar, narrower umbilicus, acuminate quadrilateral aperture, and 

 growth lines that are curved strongly backward. Another allied 

 species is Eccyliopterus sinensis (Freeh) {= Raphistoma sinense 

 Freeh) from southern China. The last, however, usually has a 

 broader umbilicus and more pronounced embracing, so that each 

 outer whorl rises, on its inner margin, above the collar of the pre- 

 ceding whorl. 



Formation and locality. — Ordovician : Near Huang-pa-yi, Shensi, 

 China. 



Holotype.—U. S.l^.M. No. 83666. 



