310 American Geologist. ^^y- ^^^^ 
ambulacra and greater size also are specific characters of C. 
super bus. 
Note. — The discovery by the writer of granular surface or- 
namentation on the plates of both dorsal and ventral cups of 
certain well-preserved Burlington crinoids, usually considered 
smooth, has led him to believe that this granular character is 
rather the rule than the exception and he is not surprised to 
add to his list other granular species from time to time. The 
list at present embraces, Agaricocrinus hrevis, Eretmocrinus 
coronatus, Baltocrinus suhaequalis, Steganocrinus sculptus, 
Agaricocrinus hullatus, Agaricocrinus wortheni (from the Ke- 
okuk) and several species of Megistocriniis and Dolatocrinus 
(from the Devonian). 
EXPLANATION OF PLATE. 
{All figures except figure 8 are drawn natural size.) 
Cyathocrinus formostis, n. sp^. 
Fig. I. Side view of the type as it lies on a slab, natural size. 
Cryptoblastus inelo O. & S. 
Fig. 2. A lateral view of a crushed specimen showing two or three 
of the top stem joints. Natural size. 
Fig. 3. A view of the anal interradius of another specimen showing 
an extra plate below the deltoid. 
Schisoblastiis sayi Shumard. 
Fig. 4. Ventral view of a specimen showing a central roof of small 
plates that extends out over the ambulacra. 
Lophoblastus pentagonus, n. sp. 
Figs. 5, 6, 7. Basal, summit and side views of the type. Nat. size. 
Fig. 8. Ventral view of the same specimen, four diameters. 
Eretmocrinus nodosus Rowley. 
Fig. 9. Side view of a fine specimen, natural size. 
Amplcxus archimediformis, n. sp. 
Fig. 10. Side view of the type specimen, natural size. 
Monilopora amplexa Rowley. 
Figs. II, 12, 13, 14, 15, 16. Stem joints surrounded by Monilopora, 
natural size. 
Figs. 17, 18. Swollen stem joints with pits and depressions. 
Fig. 19. A large crinoid stem, enveloping Monilopora. Nat. size. 
Orophocrinus stelliformis O. & S. 
Fig. 20. Ventral aspect of a natural cast, natural size. 
