(0 26 Palseontologia Sinica Ser. B 



HORIZON AND LOCALITY: A nearly perfect specimen was obtained by Messrs. 

 Morris, Barbour and Terrill in the upper quarry beds of the Machiakou or Actinoceras 

 limestone at Tangshan in the Kaiping coal basin eastern Chihli province. This specimen 

 was associated in the same slab with Salpwcjostoma terrilli and Actinoceras tani. Another 

 specimen, obtained by Mr. Geo. B. Barbour, from the same locality and horizon, is 

 associated with Lophospira pulchelliformis and Pagodispira denuiduii. These specimens are 

 deposited in the Museum of the Survey. The specific name is given in honor of Frederick 

 K. Morris, Professor of Geology in Peiyang University Tientsin, in recognition of his 

 active interest in the stratigraphic and structural problems of this country. 



Lophospira pulchelliformis Grabau (sp. nov.) 



Plate III Figs. 3, 4. 



Spire elevated, the apical angle about 60, whorls embracing only to the lower 

 carina which is strong and occupies the middle of the body of the whorl. 



Shoulder flat or very gently concave, the shoulder angle about 90, and marked 

 by a rounded, well defined, peripheral band which occupies the apex of the angle, and 

 is defined by an impressed line on either side. Lower part of whorl divided into two parts 

 by the strong body carina which is rounded and nearly equal in strength to the shoulder 

 angle. This carina is partly shown just above the suture in the earlier whorls. That part 

 of the whorl between the shoulder angle and the lower carina is concave, while that below 

 the carina is gently concave near the carina but becomes gently convex towards the 

 umbilicus, which is narrow. Lines of growth deflected backwards on the periphery, where 

 they indicate a notch of moderate depth. 



This species is the Chinese analogue of the North American L. pulchella Ulrich 

 and Scofield, which is found in the Black River horizon of the central States. The apical 

 angle of our species is somewhat larger, being 60 as against 50 to 56 in the American 

 form. The lower carina in our species is also somewhat lower down on the whorl than in 

 the American form. Nevertheless the two are very much alike. 



l 



HORIZON AND LOCALITIES: In the upper part of the Actinoceras or Machiakou 

 limestone at Tangshan, several specimens, collected by Survey expedition ; also one from 

 the same section collected by Geo. B. Barbour. 



