IM.ATi: !.\\\l. 



PAGE. 



Figs, land 2 SUBUUTBS p. undet Cfm Conrad) ....... ....................... 



ul view of a cast of the ioteilur and tup of same, showing thu peculiar I<T- 



iniiMt i..n of Int.-rlor cast* of speclesof Sul, I m<>n .!:!. (Huwa, Canada, 



1 . 3 v I-.H CANADENNIS Ulrlch ..................................................... 1071 



Figure of a cast of the Interior, restored at i-.th i-it mltu-s from other specimen*. 

 ( utawa, Canada. 



Figs. 4 and 6 - ..................................................... X'7l 



4 Caslof tli- interior; from ,r K'roup, Cannon Falls, Minnesota. The 



relative narruwneM of the shell, especially of the basal part, U the most Im- 

 portant of the clKtinetive features of this species. 



5 Banal outline of lips, 



Flf. 8 to 8 SUBULITXS DIXONKNSIK U. and S ................................................... 1071 



Lateral view of a partial cast of the Interior, showing the anterior outline of the 

 outer lip. 



7 Another view of same showing the form of the aperture, which In relatively wider 



w than In the other specie*. and the comparatively abrupt basal taper of 

 the volu- ne* Klv.-r group, IMxon, Illinois. 



8 Outline of lower and outer lips as seen from below. 



Figs. 9 to 11 SCBULITO BELomcNMH U. and S .................................................. 1072 



9 Entire cast of the Interior.* The mouth In very similar to tht of gcanculeiuu (see 



OK- 3), but the shell as a whole Is more slender, while the sides of thu whorls are 

 practically flat Instead of gently convex. 



10 Lower part of same specimen In another view, for comparison with tig. 6. Stones 



River group, Beloll, Wisconsin. 



11 Outline of lower and outer lips as teen from below. 



FigS. 12 to 16 SUBUUTBH PKHORACILI8 U. and S ................................................. 1072 



\2 Aperlural view of a fragment, with the lower extremity and the spire restored In 



outline. 

 13 and 14 Two views of another fragment, the first showing the peculiar land along the 



suture, the second the aperture. 

 15 Three lines, the lower representing the basal outline of tig. 12, the middle one the 



basal outline of fig. 14. the nil"-' " part uf the grcaUM circumference of the 



body whorl. Trenton group, Fuilsplra bed, Wykoff, Minnesota. 



Figs. 16 and IT rs Olrlch ......................................................... 1072 



Opposite views of a cut of the Interior. Stones River group, High bridge, Ken- 

 tucky. 



Figs. 18 and 19 SUBOLITKD MAMUB Ulrlch ...................................................... 1072 



Opposite views of the larger of two specimens of this small xpeclea. Stones River 

 group ("lilade limestone"), Lebanon, Tennessee. 



Fig. Suai'uro sp. uodet ..................................................... 



igmentary example of a curved species; from the Fuslsplra bed at Wykoff. 

 Minnesota. 



Figs. 21 and 22 CTRTOSPIEA WCURVATA Ulrich ................... ............... 1074 



Opposite views of the unique specimen upon which the species Is founded. Stones 

 River group. High Krldge, Kentucky. 



! .- 23 CYRTOSPIRA >wi ... 1074 



Apertural view of tin- type specimen, the apex restored In the figure, Fuslnplra 

 bed, Wykoff, Minnesota. 



Wvbellnrv tbUtpvcloMB lieoupiMMl c>f p*n. ..r iw.i lodlTldua). il mr !. ll flir. corrwl tde of 



the p0clft Md therefore tor J*U7 Mwd w the type. 



