56 BULLETIN 16 4, UNITED STATES NATIONAL MUSEUM 



LOPHOSPIRA YENTAIENSIS, new species 



Plate 29, Figures 4-6 



Description. — Heif^ht, 19 mm ; apical angle, 57° ; volutions, seven, 

 the first very minute and decidedly angular. Peripheral band 

 prominent, thick, and rounded. Upper slope flat or very slightly 

 concave; lower slope concave and sloping inward. Upper carina 

 very feeble and very close to the suture; lower carina moderately 

 sharp and strong. Surface markings comparatively well preserved, 

 curving strongly backward toward the peripheral band ; these trans- 

 verse lines may be closed by the very feeble, irregular, revolving lines. 

 Aperture round, the inner lip reflected. Umbilicus appears as a 

 very small slit in a comparatively better specimen, while it is covered 

 b}'^ the reflected inner lijD in a fragmentarj'^ one. 



Comparisons. — The general appearance of this species might be 

 considered to indicate close aiRnities with L. oweni Ulrich and Sco- 

 field, an American species, and L. cf. oimni Ulrich and Scofield, the 

 Manchurian sjDecies from the same locality, but the comparatively 

 small base and the fine lower carina prove that it is different. 



For'mation and locality. — Lower Ordovician, Kangyao formation : 

 In the black banded limestones near Shang-kang-yao, 3 miles south 

 of the Yen-tai colliery, Manchuria. 



Holotype.—U.S.'^.l^L No. 83659. 



LOPHOSPIRA species undetermined 



Plate 30, Figure 10 



A small fragment of a Lophospira (U.S.N.M. No. 83660), while 

 in general shell, features is somewhat similar to L. aojii from the 

 same locality, differs from it in having more concave upper and loAver 

 slopes and more prominent and much more strongly curved surface 

 markings. Even though this fragment seems to represent a new 

 species, it is too poor to warrant a new specific name. 



Formation and locality. — Same as preceding. 



Genus EOTOMARIA Ulrich and Scofield, 1908 



EOTOMARIA BARBOURI (Grabau) 



I'LATE 29, Figures 14-17 



1922. Liospira barhouri Grabau, Pal. Sinica, ser. B, vol. 1, fasc. 1, p. 33, pi. 3, 

 figs. 14, 15. 



Every character of the two figured specimens from the Kangyao 

 formation, Manchuria, coincides exactly with the corresponding 

 feature of Grabau's North Chinese species Liospira harhouri. The 

 comparatively depressed conical shell, lines of growth strongly de- 



