ELSE VOr SEECIES 273 
Young collectors are advised to use this list 
freely, in various ways. When the name of a 
specimen is determined the numeral of the species 
may be placed on the label, before the name, and 
the locality may be noted on the margin of the List. 
The first will assist in an orderly arrangement of 
specimens, and the second will be a valuable memo- 
randum. 
The order of classification essentially follows the 
‘«Sketch of General Arrangement,’’ found on page 
26, Bulletin 37, United States National Museum, 
with certain advised changes. 
The following abbreviations have been em- 
ployed : 
U. S. N. M.,—for ‘‘Proceedings of the United 
States National Museum’’; Arnold,—for ‘‘Me- 
moirs of the California Academy of Sciences, 
Volume III, on the Paleontology * * * of San 
Pedro, Cal., by Ralph Arnold’’; B. C. Bull. 1 and 
2,—for ‘‘Bulletins of the Natural History Society 
of British Columbia.’’ Many references are made 
to volumes of ‘‘The Nautilus,’’ and some to ‘‘The 
Manual of Conchology,’’ begun by Tryon and 
continued by Pilsbry. The other references will 
be easily understood, the Figures, when mentioned, 
referring to those on preceding pages of this book. 
Class, BRACHIOPODA 
Order, azmrHropomatTa 
Family, TEREBRATULIDAE 
Genus, ‘Terebratulina, Orbigny 
