PLATE 6. 
Pig ia .: 47. 1. ScaALiITEs ANGULATUS. ( Pag. 27.) 
Pigs2. 48. 1. Rapuistoma striata. ( Pag. 28.) 
2. An obliquely lateral view of the specimen, showing the spire, with the strre upon the surface of the shell. 
2b. View of the spire denuded of the shell. 
Fig. 3. 50. 3. RapuisroMA PLANISTRIA. (Pag. 30.) 
3a. View of the spire; the striw flat and broad. The figure does not show the interruption. 
3b. View from beneath, showing the umbilicus. The height of the shell is not shown here. (See the figures 
at the foot of page 30.) 
Fig. 3. 51. 4. RapuisToMA PLANISTRIA, var. PARVA. (Pag. 30.) 
3 ¢. View of the spire. 3 d. Lateral view. 3 e. View of the aperture. 
Fig. 4, 5. 49. 2. RapHisroMa STAMINEA. (Pag. 29.) 
5. View of the spire; the inner volutions partially denuded of the shell. 
5 a. A lateral view, showing the aperture, which is distorted by crushing from above. The denuded spire is 
shown to rise considerably above the outer volution. The strie upon the side do not bend forward as 
much as in the original. 
Fig. 6. 52. 2. PLEUROTOMARIA BIANGULATA. (Pag. 31.) 
Big. 56. 1. Murcuisonia aBBREVIATA. (Pag. 32.) 
Fig. 8. 53. 3. Pxievroromaria (Species undetermined ). (Pag. 31.) 
Fig. 9 a, b. 55. 1. CapuLus auRIFORMIS. (Pag. 31.) 
Fig. 10. 57. 1. Bucania suLcaTina. (Pag. 32.) 
10. Dorsal view, looking into the aperture, which is filled with stony matter, so that the form can not well be 
shown. The shell is denuded from a large portion cf the last volution, but is well preserved on the part 
exhibited in the figure. 
10 a. Lateral view of the fossil denuded of the shell; the cast smooth. 
Fig. 11. 58. 2. Bucania ROTUNDATA. (Pag. 33.) 
11 a. Dorsal view, looking into the aperture, which is partially filled with stony matter, and broken at the sides. 
In this view, it presents the aspect of a Bellerophon. 
11 b. Side view ; the volutions not all visible, from the umbilicus being filled with stony matter. 
11 c. Longitudinal section, showing the form and relation of the volutions to each other : the dotted line is the 
margin of the outer volution near the aperture. 
