^58 NEW YORK STATE MUSEUM 



2233 *¥* 



Ambonychia orbicularis Emmons (sp.) 



hypotype Pterinea orbicularis Emmons.. 



Geology of New York ; report on the 2d district. 1842. 



P- 395- 



Ambonychia orbicularis Hall. Paleontology 



of New York. 1847. v. 1, pi. 36, fig. 5a. 



Trenton limestone Watertown N. Y. 



Ambonychia undata ^ Clionychia undata 

 Avicula aequiradiata see Aviculopecten aequira- 

 diatus 



Avicula b e 1 1 a see Aviculopecten bellus 

 Avicula bellula see Aviculopecten bellulus 

 A v i c u la b y d i see Aviculopecten boydi 

 Avicula chemungensis see Liopteria chemung- 

 ensis 



Avicula chemungensis see Pterinea chemung- 

 ensis 



Avicula communis see Actinopteria communis 

 Avicula decussata see Actinopteria decussata 

 Avicula erecta see Glyptodesma erectum 

 Avicula flabella see Pterinea flabellum 

 Avicula fragilis see Lunulicardium fragile 

 Avicula gebhardi see- Aviculopecten gebhardi 

 Avicula 1 a e v i s see Liopteria laevis 

 Avicula limaeformis^ Limoptera ? limaeformis 

 Avicula longispina see Leptodesma longispinum 

 Avicula manticula see Aviculopecten mantic- 



ulus 



Avicula muricata see Aviculopecten muricatus- 

 Avicula naviformis see Pterinea naviformis 

 Avicula obliquata see Aviculopecten obliquatus 

 Avicula obscura see Pterinopecten 1 ?) obscurus 

 Avicula orbiculatusw Lyriopecten orbiculatus 

 Avicula pauciradiataw Aviculopecten pauci- 



radiatus 



Avicula schohariae^ Aviculopecten schohariae 

 Avicula securiformis see Pterinea halli . 

 Avicula securiformis see Pterinea securiformis 

 Avicula spinigera see Leptodesma spinigerum 



