Fic. 
Fia. 
FiG. 
Fic. 
FIG. 
PLATE 34. 
tals (PLRUROTOMARYA “TAGGHR DE jae oho i Ses SEN BL oa 
a. Side view ; natural size. 
b. Oblique view of the same, showing the base. 
2. INU CULANA OBESAS. 2 2:0. 222) pocuen Soe eae ee eee ere ers ee ee ee 
a. Left side view ; natural size. 
b. Dorsal view of the same. > 
c. Another example, showing the hinge. 
3.) bELLEROPHON SUBPAPILVOSUS a cceisin sets ce eerie eee eee ence 
a. Dorsal view; natural size. Surface not quite perfectly preserved. 
AS MURCHISONTIA, TEREBRA Ges selma eee seiole = eeieislainieihe ie eiiceeeine 
a. Lateral view ; natural size. 
. 5. PLEUROTOMARIA GRAYVILLENSIS.-....--..-. sR Seta Ba le ae Ei 
a. Side view; natural size. The upper, light portion of the figure is 
drawn from one example, and the lower portion from another. 
«(62 (NATICOPSIS(RE MB Reis eae tas rea eye orn nhac cae aa on oe ee es 
a. Side view ; natural size. 
ads INUGUGA, PERUMBONATA 222 jccciclsiscis seimice ccc cise sinaieiisie sale Bec mmeese 
a. Right side view; enlarged to one and a half diameters. 
b. Dorsal view of the same. 
sh Misi VAUN NVOLOSHB HI EocG cod Shoo 6Gns So SceS Sao Sooe Sess cose S655 fesse s 
a. Ventral view; natural size 
b. Lateral view of the same. 
9. ERISOCRINUS (CERIOCRINUS) INFLEXUS ..-..----..----- ---------- =< 
a. View of anal side, natural size, of an example from Utah. 
b. Basal view of the same. 
2 02 SPERERER VAG RV ATU a aetere ameter “zoeso4 
a. Ventral valve; enlarged to two diameters. 
b. Dorsal valve; enlarged to one and a half diameters. 
«192° LEPTOPORA | WINCHELED S20 c och eee en es aN ee 
a. Fragment of corallum, showing calyces; natural size. 
. 12. LEPTOPORA TYPA..-..-.- OEE SEI AVDA eae AS MUR ts AA yl Sk a ya Oa 
a. Upper view of an entire calyx and portions of other adjoining 
ones; enlarged to one and a half diameters. 
b. Lateral view of the same, showing the depth of the calyces and 
of the corallum. 
These examples are from the Subcarboniferous rocks of Burling- 
ton, Lowa, and are introduced here for comparison. 
140 
139 
136 
134 
128 
135 
121 
122 
