FAUNA OF THE HELDERBERGIAN 



Table of the Helderbergian Fauna 



287 



Platyceras platy stoma Hall. 10615, 27991 



' ' bisulcatum Hall 



subundatum Meek and Worth en 



" pileiforme Hall. 10619 



" calantica Hall. 8425, 10618 



" obesurn Hall. 



lamellosum Hall. 10607, 27842, '.'.['.'.'. 

 '■ spirale Hall. 10606. (Syn. P. tubiforme 



and P. incite Hall) 



newberryi Hall 



plicatum Conrad (Syn. P.elongatum Hall) 



pyramidatum Hall 



arcuatum Hall 



undulostriatum Hall 



clavatum Hall (Syn. P. curvirostrum, and 



P. agreste Hall) 



Hercyvella perlata (Hall). 10620 



Pleurotomaria labrosa Hall 



" n. sp. 



Euomphalus decollatus Hall. 25990. (Syn. E. dis- 



junctus Hall) • 



" sinuatus Hall 



Bucania profunda (Vanuxem). 10626, 25987. . . . 



" n.. sp. (Beecher collection) 



Bellerophon n. sp 



Pteropoda, 6 species. 



Conularia pyramidalis Hall 



huntana Hall 



Hyollthes centennialis Barrett 



heros Hall 



" n. sp. (Beecher collection) 



t Tentacidites elongatus Hall. 10627, 17176, 26046. 



Cephalopoda, 10 species. 



Ortlioceras longicameraium Hall. 25996 



rigidum Hall. 25995 



subtextile Hall 



desiderata Hall (Syn. O. clavatum Hall) 



tenuiannidatum Hall 



helderbergix Hall 



perstriatum Hall •. . 



rudeB.a\\. 25997 



pauciseptum Hall 



n. sp. (Beecher collection) 



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