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EXPLANATION OP PLATE 13. 



ig. t>/>. —Area camuloensis, n. sp. Outline view of upper side of specimen 

 shown on Plate 10. Natural size. 



ig. 6c. — Area camuloensis, n. sp. Detail of rib ornamentation. X~. 



i}j. 7. — Area canalis Conr. Side view. Natural size. 



7<i. — Area oanalis Conr. Bud view of specimen shown in fig. 7. 

 Natural size. 



ig. 7I>. — Arm canalis Conr. Hinge. Natural size. 



