54 BULLETIN 16 4, UNITED STATES NATIONAL MUSEUM 



LOPHOSPIRA MANCHURIENSIS. new species 



Plate 28, Figures 6-11 



Three well-preserved specimens of this new species occur in my 

 Manchurian collection. 



Description. — Height, 7 to 15 mm ; apical angle, about 60° ; volu- 

 tions about six, angular ; periphery trilineate, moderately prominent ; 

 upper or subsutural carina small and very close to the suture ; lower 

 carina comparatively sharp and strong. The upper slope is a little 

 concave, while the lower side slopes inward, and the basal part of 

 the shell is somewhat ventricose. Surface markings are very fine 

 and consist of transverse and revolving lines, the former curving 

 strongly backward toward the peripheral band, while the latter are 

 inclined to be irregular and more delicate. Aperture is rather round, 

 and inner lip is reflected and covers the umbilicus. 



Comparisons. — This species is undoubtedly closely related to L. 

 spironema Ulrich and Scofield, an American species from the Black 

 River, but the nearness of the upper carina to the suture and greater 

 irregularities of the revolving lines serve readily to distinguish it. 

 It is also closely allied to L. tenuistriata Ulrich and Scofield, 

 another American species from the Utica group, but differs in having 

 a more prominent lower carina, finer spiral lines, and sharper 

 peripheral band. 



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. 



Cotypes.—U.^.'^.M. No. 83655. 



LOPHOSPIRA cf. OWENI Ulrich and Scofield 



Plate 29, Figures 2, 3 



1897. Lophospira oweni Ulbich aud Scofield, Geology of Minnesota, Paleontol- 

 ogy, vol. 3, pt. 2, p. 980, pi. 73, figs. 41^5. 



I collected a single, but comparatively good, specimen (U.S.N.M. 

 No. 83656) from the Kangyao formation that is very similar to 

 Lophospira oweni Ulrich and Scofield. 



Description. — Height, 21.5 mm ; apical angle, 60° ; volutions about 

 five. Peripheral band prominent, thick and rounded. Upper slope 

 slightly concave, except near the suture where there is a rather low, 

 rounded ridge. Lower side sloping inward, and moderately ventri- 

 cose. Surface markings, which are clearly retained in parts of the 

 specimen, consist of rather fine lines of growth, all curving backward 

 to the jDcripheral band. Aperture is rounded oval, the inner lip 

 reflected and covering the umbilicus. 



Coinparisons. — As is seen from the above description, my specimen 

 is nearly identical with Lophospira oweni Ulrich and Scofield. 



