PLATE III. 



Orihiririiiii flat;! rdjindn : Lnircr Ordnvlciti ii : — T'(il'nti:f and T/ifinrjchia^liaii LiriUfiloiifft; 

 Upper Ordnvician : — ifacJiicil-ini T^ivifsldiir.. 



Prntmuis hij K. C. Lin (flJ^J^) 



Fi^. 1. Li'ipliOfipira rnrirrisi Drabau p. 25 



A nearly complete eliaracteristii- specimen, enlarged twice. Machiakou limestone, 

 Tangslian, Cliihli. (Cotype. (i. S. Ch. Cat. No. ."2, collected by Messrs. Morris, 

 Barbour and Terrill) . 



Fig. 2. LojiJioxpira morrini (irabau p. 2-" 



2a. A'iew of tbo spire from an nblique angle, to show the position of the peripheral 



band, and the growtli-lines upon the shoulder X 2. 

 2b. A. portion of the shoulder of the ultimate whorl enlarged six times to show the 

 nature of the peripheral Ijand and the growth lines. Machiakou limestone, 

 Tangshan, Chihli. (Cotype, G. S. Ch. Cat.^No. r,l ; Coll. (}. B. Barbour). 



Fig. C. Lnjdiii.^pirn jiith-lii'llifonni^ (Irabau p. 26 



Spire of a characteristic specimen x 2, viewed slightly from above, (with resulting 

 foreshortening), to show the peripheral band. IMachiakon limestone, Tangshan. 

 Cotype. (1. S. Ch. Cat. No. ol; Coll. G. B. Barbour). 



Fig. 4. Ldpiluisji'mi iii(lc]iellif(iniii'< Grabau .- p. 2(1 



Portion of a spire, lateral view X 2. showing amount of embracing, form, and 



strong lower carina. Machiakou limestone, Tangshan. (Cotvpe, G. S. Ch. Cat. 

 No. 41; Survey Coll). 



Fig. "i. LoplioRpiiui li-orliifiiriiiis Cirabau p. 27 



•"a., oh. opposite sidos of the bolotypo, showing the trochiform spire and strong 

 peripheral carina, x 2. Machiakou limestone, Tangshan. (Holotype, (i. S. Ch. 

 Cat. No. 40). 



Fig. 0. Lopliosjii iv (iriifa (^iiabau p. 27 



An average specimen, with a small mass of matrix adhering and the basal portion 

 imperfect x 2. IMacbiakou limestone, Chao-Kou-Chuang. (Cotype, G. S. Ch. 

 Cat. No. 47) . 



Fig. 7. T.i'ijdiiiafii i-ii pfrdi-di (ii'abau ,p. 28 



A typical specimen from the Macliiakou limestone at Cbao-Kou-Chuang, Chihli. 

 Enlarged twice. {(\ type,-G. S. Ch. Cat. No. 44). 



Fig. S. Lnplio.rpird ijirardi var. hurt Graliau p. 28 



The Holotype, showing the lax whorls entirely free at tlie aperture, the strong 

 subsutural ridge and marked roncavitv of shoulder x 2. ?ilacbiakou limestone, 

 Chao-Kou-Chuang. Chihli. (Holotype, G. S. Ch. Cat. No. 49). 



Fig. n. Liijdin.^piin Icn'anxii Grabau p. 29 



A'iew of the type, attached to rock, twice natural size. IMachiakou limestone, 

 Tangshan, Chihli. (bbdolype, G S. Ch. Cat. No. ;!3). 



Fig. 10. [j')i>liO:ipi I'd dlisnnri Giabau p. ,"0 



The type specimen, embedded in rock and partly worn so as to show the internal 

 mold X 2. Machiakou limestone. Tangshan, Chihli. (G. S. CJi. Cat. No. 37). 



i"ig. 11. I'dfjdiJi.-ipira dcrii'idii i i (Jrabau p. 31 



The tyiK.' specimen, twice enlarged. The aperture is restored. Machiakou 

 limestone, Chao-Kou-Chuang, Chihli. (Holotype, (4. S. Ch. Cat. No. lo). 



— lus — 



