IM.ATI: i. \\iii. 



Lorn~i-'i: \ I-K.HAN..II.ATA Hall sp 972 



tural view of a rather large specimen. 

 Opposite views of two small shells. 



An unusually large specimen, the last whorl of which Is free. 

 Two specimens of the average size, the fl rst with the apical angle a trifle wider 



than usual. 



Under side of a specimen showing the umbilicus. Stones River group (Safford's 

 "Central llmest- rfreesboro, Tenne 



L.ipiio-1-iiiA ACUMINATA U. and S. (or var. of PERANOI-LATA) 973 



An \ -ellent specimen f this variety, from the Richmond group, near Rich- 

 mond, Indiana. 



I'.-PIKA CRNTKALI8 Ulrlch 979 



Dorsal view of the largest and best of seven specimens of this species. Safford's 

 "Central limestone" of the Stones River tfr<m|.. Murfreesboro, Tenne 



Fig. 10 LOPHOSPIHA DBCURSA Ulrlch 975 



Anterior view of the best of two specimens, the outer side of the aperture 

 restored. Trenton group, Burgin, Kentucky. The comparative flatness of the 

 upper slopes and the hlght of the spire, considering the size of the mouth, are 

 the principal peculiarities when compared with species like L. ptronyulata. 



Figs. 11 to 14 LOPBOSPIRA ELEVATA U. and S. 977 



11 An Imperfect slllclfled shell from the upper part of the Trenton group near Bur- 



gin, Kentucky. This specimen may not belong to this species. 



12 Cast of the Interior of this species. Fuslsplra bed, Trenton group, Decorah, 



Iowa. Geological and Natural History Survey of Minnesota, Museum Register 

 N 7370. 



13 and 14 Opposite views of another cast, this being from the same horizon as the preced- 

 ing, at Kenyon, Minnesota. 



Figs. 15 to 17 I.i'iii.-i-iiiA I'KiiAcTTA C.andS. 970 



15 An unusually depressed specimen. Most of the specimens found with this are 

 like the next, only not so large. Black River shales (Rhlnidlctya bed), Su Paul, 

 Minnesota. 



10 and 17 , Opposite views of the specimen which we regard as the type of the species. It Is 

 from the upper division of the Stones River group, at Lebanon, Tennessee. 



Figs. 18 to X) 

 18 and 19 



Fig- 





Figs. 23 

 23 



H 

 



LoraoApiRA SUXNERBMSUI Safford sp. 978 



< ipposlte views of the original type of this excellent species. Upper part of Tren- 

 ton group, SuniniT county, Tennessee. 

 Another good specimen from the same locality. 



LoPUOfiPIRA PBODUCTA Ulricll 976 



Apertural view of the type "f thi- Important species. Trenton group, Nashville, 

 Tent 



I.'.I-IIOSPIRA CONOIDRA I'lrich 970 



Front view showing the general form, umbilicus and Inner lip of the type of this 

 species. Trenton group, Nashville, Tennessee. 



l'< 

 to 



27 



28 



.. 



LOPH06PIRAMBDIAI.lsU.Sn 



Four representative specimens, showing Might variation In the apical angle and 

 In other unimportant respects. Upper Trenton, near liurgln. K. -ntu- . 



An example from middle Tennessee, agreeing In every respect with the K.-n- 

 tucky types of the species. 



Under side of a cast of the Interior. 



Part of the last whorl of another Kentucky sp lining the lamellose sur- 



face markings In an unusually good state of preservatior 



H73 



