CLASSIFICATION OF TYPE SPECIMENS BY 

 GEOLOGIC FORMATIONS 



References are to the serial marginal numbers at the left of each page. 



LOWER CAMBRIC 



Spongiae 



Archaeocyathellus rams, 52 

 Archaeocyathellus rensselaericus, 53 



Cnidaria 

 Dactyloidites asteroides, 251-53 



Brachiopoda 

 Iphidea cf. ornatella, 1429 

 Kutorgina cingulata, 1430-33 

 Lingulella caelata, 1505-8 

 Obolella crassa. 1617-21 

 Obolella gemma, 1622-24 



Lamellibranchiata, 



Fordilla troyensis, 2576 



Gastropoda 



Scenella rerusa, 3459 



Pteropoda 

 Hyolithus communis var. emmonsi, 



3505, 35o6 



Hyolithus impar, 3507-9 

 Crustacea 



Aristozoe troyensis, 4138 

 Conocoryphe trilineata, 4204, 4205 

 Microdiscus meeki, 4587 

 Microdiscus speciosus, 4588-91 

 Olenellus (Mesonacis) asaphoides, 



4594-4605 

 Solenopleura ? nana, 4803, 4804 



Brachiopoda 



ST JOHN GROUP 



Discinopsis gulielmi, 1370 



Acrothele matthewi var. lata, 1068 

 Acrotreta baileyi, 1069-71 



Linnarssonia transversa, 1524, 1525 



Vermes 



Scolithus linearis, 547 



Brachiopoda 



Elkania desiderata, 1385, 1386 

 Glossina acuminata, 1396, 1397 

 Lingulepis antiqua, 1512, 1513 



UPPER CAMBRIC 



Including POTSDAM SANDSTONE 



Lingulepis pinniformis, 1514 



Linnarssonia pretiosa, 1522, 1523 

 Obolella polita, 1625 

 Syntrophia (?) calcifera, 2102 



Gastropoda 

 Palaeacmaea typica, 3360 



LOWE;R SILURIC 



Brachiopoda I Schizambon typicalis, 1876-78 



Porambonites gigas, 1755 



BEEKMANTOWN LIMESTONE 



Plantae 

 Palaeophycus tubulare, 14-17 



Cnidaria 



Clonograptus (Goniograptus) 

 nov., 4879 



Didymograptus (Leptograptus) sp. 



nov., 4881 

 Goniograptus thureaui var. postre- 



mus, 4Q23-33 

 Phyllograptus ilicifolius, 4934 



