2 



Pentremitidea Maleadai, E. ^ ('., p. 175. 



Page 

 Fig. 18. Radial view of a specimen with the base broken across obliquely , and exhibiting 



the coarse ornamentation. Lower Devonian, Leon. Coll. P. H. Carpenter. 



x2 24 



Fig. 19. Summit view of the same individual. x2 . . 104 



Pentremitidea Lusitanica, E. §■ C, p. 173. 



Fig. 20. Radial view of a specimen showing a curved interbasal suture. Lower Devonian, 



Asturias. Natural size 24 



Metablastus? Hispanicus, E. fy C, p. 200. 



Fig. 21. Radial view of a worn individual, with the basal cup broken. Lower Devonian, 



Leon. Natural size 11 



Metablastus? Cottaldi, M. Chalmas, sp., p. 201. 

 Fig. 22. Side view of the basal cup, showing one of the large basals (■//), and the grooves 

 along the interbasal sutures. Lower Devonian, France. Coll. P. H. Carpenter. 

 Natural size 197 



Cryptoschisma Schulzi, d'Arch. §• de Vern., sp., p. 281. 



Fig. 23. Summit view showing the broad petaloid ambulacra and the wide subpetaloid 



lancet-plates. Lower Devonian, Asturias. x 4 89 



Fig. 24. A radial sinus with the ambulacral elements removed, showing portions of two 

 deltoid plates, one of which is abnormally developed, and the radio-deltoid 

 sutures crossing the hydrospire-slits. x G 32 



Fig. 25. An entire specimen, with the appearance of five stem-joints attached. The broad 

 short radials and long constricted basals are well shown. Lower Devonian, 

 Asturias. xH 21 



Fig. 26. Another specimen, showing the truncated and almost flat summit, the broad, 

 short radials, and the constriction iu the centre of the basal cup, which causes 

 its lower half to resemble a stem-joint. Lower Devonian, Asturias. Coll. 

 P. H. Carpenter. x 4 11 



Pentremites elegans, Lyon ? 

 Fig. 27. Inverted base of a Pentremite, to show the superficial markings which have been 

 thought to indicate the presence of under-basals. Subearbonifcrous, Illinois. 

 Coll. P. H. Carpenter. x 4 20 



Pentremites, sp. 

 Fig. 28. Radial view of a decorticated specimen, with the pinnules rising above into a kind 



of dome. Subearbonifcrous, Kentucky. Coll. Waehsmuth. x 4 .... 70 



Pentremites elongatus, Shumard, p. 161. 

 Fig. 29. Basal view, to show the curved interbasal sutures. Subearbonifcrous, Iowa. Coll. 



Waehsmuth. x 2 20 



