CLASSIFICATION OF TYPE SPECIMENS BY 

 GEOLOGIC FORMATIONS 



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



LOWER CAMBRIC 



Spongiae 



Archaeocyathellus rarus, 52 

 Archaeocyathellus rensselaericus, 53 



Gnidaria 

 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 



Ijamellibranchiata 



Fordilla troyensis, 2376 



Gastropoda 



Scenella retusa, 3459 



Pteropoda 

 Hyolithus communis var. emmonsi, 



3505, 3So6 

 Hyolithus impar, 3507-9 

 Crustacea 

 Aristozoe troyensis, 4138 

 Conocoryphe trilineata, 4204, 4205 

 Microdiscu9 meeki, 4587 

 Microdiscus speciosus, 4588-91 

 Olenellus (Mesonacis) asaphoides, 



4594-4605 

 Solenopleura ? nana, 4803, 4804 



ST JOHN GROUP 



Brachiopoda 



Acrothele matthewi var. lata, 1068 

 Acrotreta baileyi, 1069-71 



Discinopsis gulielmi, 1370 

 Linnarssonia transversa, 1524^ 1525 



UPPER CAMBRIC 



Including POTSDAM SANDSTONE 



Vermes 

 Scolithus linearis, 547 



Brachiopoda 

 Elkania desiderata, 1385, 1386 

 Glossina acuminata, 1396, 1397 

 Lingulepis antiqua, 1512, 1513 



Lingulepis pinniformis, 1514 

 Linnarssonia pretiosa, 1522, 1523 

 Obolella polita, 1625 

 Syntrophia (?) calcifera, 2102 



Gastropoda 

 Palaeacmaea typica, 3360 



LOWER SILURIC 



Brachiopoda 



Porambonites gigas, 1755 



Schizambon typicalis, 1876-78 



BEEKMANTOWN LIMESTONE 



Plantae 

 Palaeophycus tubulare, 14-17 

 Gnidaria 



Clonograptus (Goniograptus) sp. 

 nov., 4879 



Didymograptus (Leptograptus) sp. 



nov., 4881 

 Goniograptus thureaui var. postre- 



mus, 4923-33 

 Phyllograptus ilicifolius, 4934 



