NO. .:; 



CASSIDULOID ECHINOIDS — KIER 



IJI 



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101 



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102 



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103 





 



105 



104 



106 



Figs. 101-106. — lOl, Petalobrissus triiicniol'ygus (Cotteau): Phyllode of ambulacrum V of specimen in Museum 

 ational d'Histoire Xaturelle, Paris, from' the Upper Cretaceous (Santonian") at Ain Aourou, Algeria, X IS- 

 a, Petalobrissvs djelfcnsis (Gauthier") : Phyllode of ambulacrum II of holotype in the Lambert Collection, 

 orbonne. Paris, from the Upper Cretaceous (Santonian) at Djelfa. Algeria, X 10. 103, Pctalobnssus ammonis 

 ?ourtau): Phvllode of ambulacrum IV of paratvpe (N'o. 25410") in Geological Museum, Cairo, Egypt, from 

 le Upper Cretaceous (Turonian) at head of Wadi Tarfa, Egypt, X iS- KM, Petalobrissus Icfcb'.Tci (Fourtau) : 

 hyllode of ambulacrum II of holotvpe (No. 23408) in Geological Museum, Cairo, Egypt, from the Upper 

 retaceous (Turonian) at Abu Roash, West Cairo, Egypt. X 15. 105. Petalobrissus ncltneri (Lambert): Phyl- 

 de of ambulacrum II of holotype in the Lambert Collection. Sorbonne. Paris, from the Cretaceous (Cenoma- 

 iaa), at Msouma. 2* km. east of J'Adouz, Algeria. X 10. 106, Petalobrissus cnbensis (Weisbord) : Phyllode 

 ■ ambulacrum III of USNM 131265, from the Upper Cretaceous (Senonian) at Rio Seco, Medina County, 

 ex., X 10. 



