SUBJECT AND AUTHOR INDEX 
VOLUME XIX 
Acrolichas 72 
Acrolichas (?) shideleri 73 
Actinoceras amundseni 289 
cf. tenuifilum centrale 295 
parksi 297 
sp 287, 291, 292 ' 
tenuifilum 284 
tenuifilum centrale 293 
tenuifilum ursinum 296 
‘^Additional Notes on, Brassfield Echinodermata.’’ By Frank Springer.... 81 
Alidade, adjustment of the 137 
care of the 141 
description of the 98 
manipulation of the, curvature and refraction 135 
to determine bearing 105 
to determine differences in elevation 120 
to measure distance Ill 
Alunite 39 
“America’s Advance in Potash Production.” By W. C. Ebaugh 33 
Amphilichas cucullus 214 
Bathyurus spiniger 222 
Beatricea gracilis 195 
Botryocrinus 21 
Brockocystis nodosarius 5 
Bumastus holei 214 
rowleyi 215 
Calymene abbreviata 74 
breviceps 78 
cedarvillensis 78 
niagarensis 78 
sp. (Lorraine form) 75 
sp. (West Union form) 77 
retrorsa minuens 76 
Calyx of unknown species of crinoid, base of 14 
Castle, William E. “Education for Scholarship” 225 
Ceraurinus cf. trentonensis 216 
325 
