PLATE VIII. 



LAOTIRA CAMBRIA (p. 32). 



Fig. 1. View of an exumbrella with 12 narrow lobes. The arrangement of the lobes shows a slight 



tendency to irregularity. 

 Fig. 2, 2a. View of the exumbrella and subumbrella sides of a specimen having many lobes, in which 



the tendency to an irregularity of arrangement is greater than in figs, la and 2a of 



PI. VII. 

 Fig. 3, 3a. Side views of a specimen in which the exumbrella lobe is flattened out and the subum- 

 brella and interradial lobes are clearly defined. 

 Fig. 4. Exumbrella view of a somewhat distorted individual with 5 regular lobes and 3 projecting, 



irregular, interradial lobes. 

 Fig. 5. Exumbrella view of a specimen with 6 broad lobes. 

 Fig. .5a. Subumbrella view of fig. 5, showing a complex system of lobes, somewhat like that of 



fig. 5a of PI. X and fig. 3 of PI. XIII. 

 Fig. 6. Exumbrella view of a specimen in which the irregularity of the lobes is strongly marked. 

 Fig. 7. A specimen, flattened out in the shale, in which the radial exumbrella canals appear as 



narrow, dark, iron-stained bands; the mass of the medusa leaving but a film which is 



scarcely perceptible on the shale. 

 Fig. 8. Subumbrella surface of a large individual in which the irregularity of the arrangement 



of the lobes is much more marked than in figs, la and 2a of PI. VII. 

 Fig. 9. Partial side and subumbrella view of fig. 6, PI. XIII. The lobes SB, so correspond to the 



lobes as, x of the latter figure. 



120 



