INDEX. 
211 
Page. 
Rhynchonella oblata 74 
Rhynchonella planoconvexa 70 
Rhynchonella pliopleura 74 
Rhynchonella principalis 74 
Rhynchonella pyramidata 66,70,71,72,73 
Rhynchonella rarnsay i 74 
Rhynchonella rudis - 75,76 
Rhynchonella semiplicata - - 75, 76 
Rhynchonella speciosa 71,72,73,74 
Rhynchonella suessana - 80 
Rhynchonella sulciplicata 75, 76 
Rhynchonella sulcoplicata 76 
Rhynchonella transversa 75, 76 
Rhynchonella vellicata 64, 69, 70, 71, 72, 73 
Rhynchonella ventricosa 71, 72, 73, 77 
Rhynchonellas, Square Lake fauna, de- 
scriptions of -- 56-78 
list of species of 67 
plates showing figures of 64, 66 
Rhynehonellidse, geologic horizons of. - 57-59 
Rhynchopora - 57 
Rhynchospira 32,53,55 
Rhynchotrema - 57,58,60 
Rhy nchotrema capax - 58 
Rhynchotrema f ormosa 58 
Rhynchotrema insequival ve 58 
Rhynchotreta — - 57,58,59,60 
Rhyolite breccia, occurrence and char- 
acter of - - 158 
Rhyolites, analyses of 155-156, 188 
occurrence and character of. 107-109, 152-161 
perlitic type of 157-158 
plate showing " birch-bark " weath- 
ering of 108 
plate showing perlitic type of 158 
spherulitic, from Haystack Moun- 
tain, plate showing.. 107 
Ripogenus Falls, Lower Helderberg, 
rocks at 31 
Rogers, W. B., fossils identified by 29 
Rohrig, A., analysis by 171-172 
Romingeria 43 
s. 
St. Croix River, localities examined on . . 199 
sandstoneson 144 
St. Croix Station, slates and sandstones 
at and near 144 
St. Helens Island, Canada, fossils from. .'57 -39 
St. John River, localities examined on. 203 
Salmon Brook, localities examined on . 197 
volcanic conglomerates on 128, 130-131 
Salter, J. W., cited on age of fauna of 
rocks of Arisaig section, Nova 
Scotia 41 
Sandstones, analyses of 139, 188 
occurrence and character of. 131-134, 136-139 
plates showing 132, 134 
Sanguinolites 40,79 
Schists and slates, occurrence and char- 
acter of 143-145 
Schizocrania. 36 
Schmelck, analyses by 166,176-177 
Schneider, E. A., analyses by 183-184 
Page. 
Schuchert, Charles, cited on genera of 
the Rhy nchonellidaa 57 
Schuchert, Charles, and Clark, J. B., 
cited on Devonian aspect of 
Lower Helderberg fauna .. 81 
Seboois River, fossils from 29, 30 
Sedgwick Lake, features and fossils of 
limestoneat 54-78 
See also Square Lake. 
Serpulites 41 
Shaler, N. S., cited on Silurian deposits 
of Cobscook Bay 34 
Sheridan Plantation, fossils from 47 
Sheridan sandstone, age of 21, 49, 51 
features and fossils of 47-49 
occurrence and character of 132-133 
plates showing 132,134 
Sillery rocks, age of.. 23 
Silurian system, passage beds from 83 
upper limit of 83 
formations of 21 
Silurian-Devonian boundary in Amer- 
ica 25-26 
Slate, plate showing 144 
Slates and schists, occurrence and char- 
acter of 143-145 
Smyrna Mills, localities examined near. 196 
slates and sandstones at and near. . 144 
Somerset County, new Paleozoic fos- 
sils from 44-92 
South Mapleton, andesites in 113 
Sphenopteris 31 
Sphenotus 91 
Spherulitic rhyolite, plate showing 107 
Spirifer 34,35,36,37,38,41,42,43,44,47, 
48, 49, 50, 51, 53, 54, 55, 79, 80, 86, 89, 90, 91, 92 
Spirifer arenosus 61 
Spirifer concinnus 38 
Spirifer cyclopterus 38, 80 
Spirifer elevatus 83 
Spirifer hesione 32 
Spirifera 28, 29, 30, 31 , 32,33, 37, 38, 39, 40, 52, 80 
Spirorbis 42 
Spragueville, arenaceous limestones 
near 140 
localities examined at 195 
Square Lake, age of fauna of 31,22,26,51,56 
features and fossils of limestone at . 30, 
31-33,54-78 
plates showing Rhynchonellas of 
limestone at 64,66 
Square Lake fauna, Canadian equiva- 
lents of 87 
Square Lake limestone, age of . . . 21, 22, 26. 51 , 56 
features and fossils of 30, 31-33, 54-78 
Rhynchonellas of 64,66 
Square Mountain, fossil from 29 
Lower Helderberg rocks at 31 
Stenopora 29,37,41 
Sternbergia ."... 31 
Stictopora 36 
Stokes, H. N., analysis by 171-172 
Stony Brook, fossils from 91 
Streptelasma 35,48 
Streptorhynchus 30, 32, 33, 36, 38 
Striatopora 43 
