FORMATIONS AND FOSSILS OF SOUTH MANCHURIA 55 



Nevertheless, the Manchurian specimen differs in one or two minor 

 details, namely, in having finer surface markings and a more feeble 

 ridge near the suture. If in the future I am able to get more and 

 better specimens, a more detailed comparison with the American 

 species may prove whether this species is identical with L. oweni. At 

 present, it does not appear wise to attempt to identify them as the 

 same. I have therefore described this as an allied species. 



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

 In the black banded limestones in the vicinity of Shang-kang-yao, 

 3 miles southeast of the Yen-tai colliery, Liao-tung. 



LOPHOSPIRA PRODUCTA PAGODAI, new variety 



Plate 29, Figures 8-11 



A single rather good specimen and several fragments constitute 

 the material on which this new variety is based. 



Description. — Height, about 24 mm; largest diameter about 10 

 mm ; apical angle, 32° ; volutions, about seven. 



This variety agrees in all respects with Lophospira product a 

 Ulrich, from the Upper Trenton group in North America, except 

 that the peripheral band has a little higher position and there is a 

 closed umbilicus. 



Comparison. — This variety is related to Pagodispira derwiduii 

 Grabau from the Machiakou limestone in Chihli, being distinguished 

 by a wider upper slope and comparatively deeper inclosing of the 

 whorls. 



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

 In the black banded limestones in the vicinity of Shang-kang-yao, 

 3 miles south of the Yen-tai colliery, Liao-tung. 



Holotype and paratype. — ^U.S.N.M. No. 83657. 



LOPHOSPIRA TURRITIFORMIS, new species 



Plate 29, Figubes 12, 13 



Description. — Height, 14 mm; apical angle, 51°; volutions, about 

 seven, angular ; the peripheral band trilineate, prominent ; upper 

 and lower carinae both distinct; upper carina very close to the 

 suture; both upper and lower slopes moderately concave. Surface 

 markings very fine, sweeping strongly backward to the peripheral 

 band. Aperture not observed; umbilicus apparently closed. 



Comparisons. — This species is allied to L. saffordi Ulrich, an 

 American species from the Upper Trenton, but the narrower apical 

 angle and position of upper carina serve readily in distinguishing it. 



Formation and locality. — Same as preceding. 



B.olotype.~\].'^:^M. No. 83658. 



