PLATE X. 



Pkxtkkmitidka LrsiTAMCA, /•'. \ C, p. 173. 



I ■ ■ ■ 

 Fig. 1. Portion of an ambulacrum, showing the ambulacra] groove, the large side plates, 



and the peculiar outer side plates. Lower Devonian, Aaturias. x 12 . . . 62 

 Pentremitidea bimilis, E. § C, p. 180. 

 Pig. 2. [nterradial view, to show the paraohute-shaped outline of the <::il yx . .Middle 



Devonian, Eifel. X 3 170 



Fig. 3. Portion of an ambulacrum enlarged, to show the large oblong bydrospire-porea and 



the peculiar outer side plates. x 12 62 



Fig. 4. Summit view of the specimen represented in Fig. 2. x 4 11 



Granatocrinus McCoyi, E. $$ C, p. 252. 



Fig. 5. InterradiaJ view, to show the outline of the calyx, the position of the radio-deltoid 



suture, and the ornate surface. Carboniferous Limestone, Lancashire. x 5 . '-'II 



Fig. 6. Inferior aspect of the same specimen, exhibiting the broad and almost flat base. 



x 5 252 



Fig. 7. Intcrradial view of another and rather more inflated individual, with a flatter sum- 

 mit, x 4 2 11 



Fig. 8. Summit view of the same specimen, showing the lancet-plates with all the side 



plates removed, and the large partially divided spiracles. x 10G 



Granatocrinus campanulatus, McCoy, sp., p. 251. 

 Fig. 9. Interradial view of a young specimen, with a very broad and flat base. Carbo- 

 niferous Limestone, Lancashire. x 5 252 



Fig. 10. Summit view of another example, showing the thickened margins of the spiracles. 



x 5 107 



Granatocrinus Norwoodi, 0. fy S., sp., p. 2 15. 

 Fig. 11. Portion of an ambulacrum (drawn from two specimens), with the median groove of 

 the lancet-plate exposed in the middle line. The side plates are in position 

 below, but have fallen away above so as to expose the hydrospire-plates. Sub- 

 carboniferous, Iowa. Coll. Wachsmuth. x 9 58 



Granatocrinus ellipticus, G. B. Sby., sp., p. 253. 



Fig. 12. Portion of an ambulacrum, with the lancet-plate and some of the side plates in situ 

 above but removed below, so as to show a clear entrance into the visceral cavity 

 of the calyx between the converging hydrospire-plates. On the right side the 

 pores are visible, whilst on the left a portion of the radial plate has been removed 

 to show the hydrospirc-platc. Carboniferous Limestone, Lancashire. x 4 . 48 



Fig. 13. A very beautiful and naturally weathered cross section of a calyx, which shows the 



five lancet-canals and the ten hydrospires. x 3 50 



Fig. 14. Portion of an inverted and much weathered calyx, showing below two spiracles, 

 and proceeding from them the partially open and partially closed hydrospire- 

 tubes. x 3 49 



