188 The American Geologist. September, 1893 
only having been fortunate enough to obtain a flint tool in its 
original place. 
The efforts of the opponents to meet the arguments brought 
forward were less convincing to the Section, though urged for 
the most part with ingenuity and propriety. Only one of the 
disputants lost self-control and allowed himself to employ 
unparliamentary language in denying that any discrepancy 
existed between the story of the Nampa image as told by 
himself and by major Powell. However, as the two versions were 
read before the Section next morning without note or com- 
ment, the assertion under consideration was at once annulled 
by its obvious inaccuracy. 
On the whole the advocates of glacial man in America 
appear to have gained strength from the discussion, perhaps 
as much in consequence of the ingenuity of the arguments to 
which their opponents resorted and the unfortunate and preju- 
dicial manifestation of temper, above referred to as in conse- 
quence of any great accession of valuable evidence brought 
forward by themselves. The question is still sub judice. 
REVIEW OF RECENT GEOLOGICAL 
LITERATURE. 
Revision of the Families of Loop-bearing Brachiopoda : The Devel- 
opment of Terebratalia obsoleta Dall. By Chas. E. Beecher. (Trans. 
Connecticut Academy, vol. ix, 1893, pp. 376-399, plates i, ii, iii.) 
Dr. Beecher continues his important systematic studies of the 
Brachiopoda. In the first paper is given a new arrangement of the 
genera of the suborder Ancylobrachia, basing it upon the entire history 
of the individuals, or ontogeny, and not as heretofore alone on mature 
characters. 
The old families Terebrahdidx and Terebratellidw are retained, but 
not in the sense that the former embraced all the short-looped genera 
and the latter the long-looped ones. The family. TerebratulidCB is char- 
acterized by having, in all stages of growth, a free loop, which may be 
long or short, with the cirri directed outwards in larval stages. In the 
Terebratellida' the loop "undergoes a series of metamorphoses while 
attached to a dorsal septum during the larval and immature stages of 
the animal, and in the higher forms results in a loop of secondary 
growth, much like the primary loop of some of the early genera of the 
Terebratulidu. Cirri directed inwardly in larval stages." 
