(i) 36 Pahconiulogia Sinica Ser. B 



Order Ctenobranchiata Schweigger 



Family PYRAMIDELLID^^ Gray 



Genus FUSISPIRA Hall 

 Fusispira sp. 



Plite 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 Avhorls if not more, the apical portion of both 

 specimens being imperfect. The \\1iorls are of some-what 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, \vhich is very oblique, and forms an 

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

 surface markings nut ascertained. 



This shell has the general form and proportions of Fusi<iplra angusta Ulrich and 

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

 Chinese sjiueies is smaller liy perhai)S 5 degrees, the whorls shorter, and the suture 

 deeper. 



Horizon and Locality: In the Peiliutz^ limestone of the Shih-]\Iun-Chai region, 

 associated with Oplu I da squamosa. Collected by F. F. Mathi;. u. 



Class CEPHALOPODA 



Order NAUTILOIDEA Zittel 



Suburdfr Holochoanites Hyatt 



Family ENDOCERATID^E Hyatt 



Genus PrOTEROCAMEROCERAS Ruedemann 



Proterocameroceras mathieui Giabau (sp. iiov.) 



Plate IV, Figs. 1 • 3 



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

 suggest that the shell had a length of a foot, and prolialJy much more. Morem'er the 

 fragments may repr(.'sent only tlie earlier ]>art of the coiK'h. 



