PLATE (5. 



Ftg. I a, b. 47. 1. ScALITES ANGUI.ATUS. ( Pug. 27.) 



Fig. 2. 48. 1. Rapuistoma striata. (Pag. 28.) 



'i m. Au oblii|Ucly lateral view o( the specimen, showing the spire, with the stris upon the surface ol the shell. 

 i b. View of the spire denuded of the shell. 



Fig. 3. 50. 3. Rapuistoma PLANisTKiA. (Pag. 30.) 



3 a. View of the spire ; the stria: Hat and broad. The tigure dues not show the interruption. 

 3 b. View from beneath, showing the umbilicus. The height of the shell is not shown here. ( See the figures 

 at the foot of page 3U.) 



Fig. 3. 51. 4. Rapuistoma planistuia, oar. parv a. (Pag. 30.) 



3 c. Vi«w of the spire. 3 </. Lateral view. 3 e. View of the ^>erture. 



Fig. 4, 5. 49. 2. Rapuistoma staminea. (Pag. 29.) 



3. View of the spire ; the inner volutions partially denuded of the shell. 



i 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 stria; upon the sida do not bend forward as 



much u in the originaL 



Fig. 6. 52. 2. Pleurotomaria biangulata. (Pag. 31.) 



Fig. 7. 56. 1. MuRCHisoMA abbreviata. (Pag> 32.) 



Fig. 8. 53. 3. Plevzotoxauia {Species u?idetermhied). (Pag. 31.) 



Fig. 9 a, A. 55. 1. Capulus AURiFORMis. (Pag. 31.) 



Fig. 10. 57. 1. BtrcANiA sulcatina. (Pag- 32.) 



to. 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. 



to a. Lateral view of the fossil denuded of the shell ; the cast smooth. 



Fig. 11. 58. 2. BucANU ROT0NDATA. (Pag. 33.) 



11 a. Doml 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 1. Side view ; the volutions not all visible, from the umbilicus being filled with stony matter. 

 U e. 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. 



