TYPE SPECIMENS OF PALEOZOIC FOSSILS 553 



Hall. Paleontology of New York. 1879. v. 5, pt 2, 



P 9> P 1 3> % 3°- 



Hamilton shales Canandaigua lake, N. Y. 



Platyceras trilobatum Hall 



3407 i£f 2 -ii type Platyceras trilobatum Hall. Paleontology 



of New York. 1859. 3:316, pi. 57, fig. 5a- 5 c. 



Helderbergian Schoharie N. Y. 



Platyceras undatum Hall 



3408 J-4f2 7 TYPE platyceras undatum Hall. Illustrations of 



Devonian fossils. 1876. Gasteropoda, pi 7, fig. 1, 2. 



Hall. Paleontology of New York. 1879. v - 5> P* 2 > 

 p. 17, pi. 7, fig. 1, 2. • 



Onondaga limestone Schoharie N. Y. 



Platyceras ventricosum Conrad 



3409 *°f gg hypotype Platyceras ventricosum Conrad. An- 



nual report on the paleontology of New York. 1840. 

 p. 206. 



Hall. Paleontology of New York. 1859. v. 3, pi. 56, 

 fig- 3^, 3 b - 



Helderbergian Schoharie N. Y. 



Platyceras ventricosum see Diaphorostoma 

 ventricosum 



Platyostoma aplata see Diaphorostoma apla- 

 tum 



Platyostoma euomphaloides see Diapho- 

 rostoma euomphaloidcs 



Platyostoma lineata see Diaphorostoma linea- 

 tum 



Platyostoma lineata var. a m p 1 a see Dia- 

 phorostoma lineatum var. amplum 



Platyostoma lineata var. calloso see Dia- 

 phorostoma lineatum var. callosum 



Platyostoma turbinata see Diaphorostoma 

 turbinatum 



Platyostoma turbinata var. see Diaphoro- 

 stoma turbinatum ra> . 



Platyostoma ip tee Diaphorostoma sp. 





