224 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 1 44 



Genus CENTROPYGUS Ebray 



Ccntropygus Ebray, 1858, Bull. Soc. Geol. France, ser. 2, vol. 15, p. 483. Type 

 species by subsequent nionotypy, Antropygns guetinicus Ebray, 1859. 



Remarks. — Because the genus and type species of Centropygus 

 have never been adequately described or figured, there is considerable 

 uncertainty as to the value of this genus. Ebray erected this genus 

 because he considered its apical system to be distinctive, having small, 

 separated oculars II and IV. The type species has never been ad- 

 equately described or figured. In his original generic description, 

 Ebray refers no species to the genus but gives a rather diagrammatic 

 drawing of its apical system. Later, he (1859, P- 759) states in a 

 footnote that the genus has for its type Anthropygus guetinicus. 

 According to Lambert and Thiery (1921, p. 337) the "Anthropygus" 

 is a typographical error for Centropygus. Presumably, the apical 

 system figured in his earlier paper is of Centropygus guetinicus. This 



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183 



182 ' ^ 



184 



Figs. 182-184. — 182, Apatopygus recens (Milne Edwards) : Phyllode of ambula- 

 crum IV of specimen 856 in the Museum of Comparative Zoology, Harvard, X 6. 

 183, 184, Vologesia hiingarica (Szorenyi) : Apical system, X I5. and phyllode IV, 

 X 10, of USNM 131284, from the Upper Cretaceous (Senonian), Sumeg, Kovesdomb, 

 Bakony. 



