REPORT OF THE STATE PALEONTOLOGIST I903 



273 



hexagonal, and have slightly raised centers; plate lo is the last to 

 have a side in contact with any of the basal plates, it is pentagonal 

 and about the size of no. 7. Plate 1 1 is a large pentagonal plate and 

 may be considered as the first in the third row, though it is so wedged 



-^ .y 



Fig^. I Analysis of the type specimen, designated as specimen A, of Malocystites 

 emmonsi. Ihe mouth with its plates bearing the food grooves will be found just above the 

 center of the diagram; the anus (As) not far below it; the basals are numbered i, 2 and :; and 

 will be found at the extreme upper and lower portions of the figure. The more prominent 

 mounds and ridges have been rather roughly indicated by hachures. 



in between plates lo and 4 as to have its lowest angle touch the 

 highest angle of plate i ; the center of this plate lies a little to the 

 right of a line drawn from anus to base and is the lowest of three 

 that might be called the anal row. Passing still to the right, no. 12 

 is the largest of the remaining plates with one exception, is hep- 

 ta-gonal, and bears a moderate umbo. Plate 13 supports the fifth and 

 the following brachials fif I may so call these plates) of the anterior 

 arm; plate 14 supports the third brachial of this arm and also half 



