Fig. 430. — Devonian brachiopods : A, Hipparionyx proximus ; B, Spirifer acumi- 

 natus ; C, Stropheodonta demissa; D, Spirifer mucronatus ; E, Rhipidomella oblata; 

 F, Camarotoechia endlichi; G, Tropidoleptus carinatiis ; H, Atrypa reticularis ; I y Gypi- 

 dula galeata; J, Spirifer dis functus ; K, Eatonia medialis ; L, Chonetes coronatus, 

 My Productella spinulicosta; N and 0, two views of Hypothyris cuboides; P, Reus- 

 seloeria ovoides. 





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FlO. 431. — Devonian bryozoans : A, Fistulipora micropora surrounding a crinoid 

 Stem ; />', a portion of the same greatly enlarged to show the arrangement of the cells; 

 C, brani hes of Cystodictya hamiltonensis ; D, Polypora lilcea. 



