(0 36 Palasontologia Sinica Ser. 3 







Order Ctenobranchiata Schweigger 



Family PYRAMIDELLID>E Gray 



Genus FUSISPIRA Hall 



Fusispira sp. 



Plate III, Figs. 17, IS. 



Among the material collected by M. Mathieu from the Peilintze limestone, are 

 two specimens of a gastropod, which, from the general form of the spire and the contour 

 of the whorls, is referable to the genus Fusispira. The apical angle is 11 or 12 degrees, 

 and the shell consists of about 10 whorls if not more, the apical portion of both 

 specimens being imperfect. The whorls are of somewhat greater diameter than their 

 length, uniformly rounded, and gradually enlarging. The amount of embracing is slight, 

 producing a loose-coiled shell, with a deep suture, which is very oblique, and forms an 

 angle of 51 to 57 degrees with the axis of the shell. Character of aperture and nature of 

 surface markings not ascertained. 



This shell has the general form and proportions of Fusispira angusta Ulrich and 

 Scofield, from the Trenton of the central United States, but the apical angle of the 

 Chinese species is smaller by perhaps 5 degrees, the whorls shorter, and the suture 

 deeper. 



HORIZON AND LOCALITY: In the Peilintze limestone of the Shih-Mun-Chai region, 

 associated with Ophileta squamosa. Collected by F. F. Mathic-u. 



Class CEPHALOPODA 



Order NAUTILOIDEA Zittel 



Suborder Holochoanites Hyatt 



Family ENDOCERATID^E Hyatt 



Genus PROTEROCAMEROCERAS Ruedemann 



Proterocameroceras mathieui Grabau (sp. nov.) 



Plate IV, Figs. 1 - 3 



Orthoceracones of unknown size, represented so far only by fragments, which 

 suggest that the shell had a length of a foot, and probably much more. Moreover the 

 fragments may represent only the earlier part of the conch. 



