PLATE XIII. 



LAOTIKA CAMBRIA (p. 32). 



Fig. 1. Exumbrella surface of a specimen in which 3 centers are distinctly developed. 



Fig. 2. Exunibrella surface of a complex specimen with 5 or more centers. 



Fig. 3. Exumbrella surface of a specimen having 3 or more centers, the lobes being unusually 



narrow and strongly marked by fine, irregular, inosculating lines that may represent 



the original surface. 

 Fig. 3a. Subumbrella view of fig. 3, showing openings of canals in some of the lobes. 

 Figs. 4, 4a. Exumbrella and subumbrella views of a small specimen, the subumbrella surface of 



which has narrow, irregular lobes. The surface of the lobes is marked much like those 



of fig. 3. 

 Fig. 5. Exumbrella view of a complex, irregular specimen with large lobes. 

 Fig. 5a. Subumbrella view of fig. 5, showing the lobes in strong relief, xx, same as xx of fig. 5. 

 Fig. 6. Subumbrella view of a complex specimen with narrow lobes in strong relief. The lobes 



x, x correspond to the lobes as, x of the side view of this specimen on PI. VIII, fig. 9. 

 All figures natural size and reproduced from photographs. 



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