Figs. 2-7. — 2, Galeropygus agariciformis (Wright): Phyllode of ambulacrum III of USNM 19561, from 

 Jurassic (Inferior Oolite) at Cheltenham, England, X 10. 3, Galeropygus constantini (Cotteau) : Phyllode of 

 ambulacrum IV of topotypic specimen in Lambert Collection, Sorbonne, Paris, from Jurassic (Bajocian) at 

 Les Tremardieres, Poitiers, France, X IS- 4, 5. Hyboclypus gibberulus Agassiz: 4. Apical system of specimen 

 »n Museum of Comparative Zoology, Harvard, from Jurassic (Inferior Oolite) at Broad Windsor, England, X 4. 

 Many of the plate sutures were not visible. 5, Phyllode of ambulacrum II of specimen in Lambert Collection, 

 ^'^■■bonne, Paris, from Jurassic (Bathonian) at Amberieux (Ain) France, X 10. 6, 7, Hyboclypus caudatus 

 Wright: 6, Apical system of Wright's (1856, pi. 22, fig. 2h) figured specimen from the Inferior Oolite in the 

 Kritish Museum (B.M.E. 1505), magnification not known; 7, phyllode of ambulacrum V of specimen in Lambert 

 Collection, Sorbonne, Paris, from Cheville (Sarthe), France, X iS. 



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