24 Meek and Worthen on Paleozoic Crinoidea. 
so, we avail ourselves of this opportunity to express our thanks 
to Mr. Wachsmuth for the zea mf industry, skill and intelligence 
he has brought to bear, in collecting and preparing for study, 
such an unrivaled series of the Meuectster fossil Crinoidea of this 
wonderfully rich locality. Some idea of the extent cf his col- 
lection of these precious relics may be formed,,when we state 
that of the single family Actinocrinide alone, after making 
due allowance for probable synonyms, he must have specimens | 
of near 150 species, or perhaps more, and many of them show- 
ing the body, arms and column 
is also due to Mr. Wachsmuth; that we should state here 
that he i is not a mere collector only, but that he understands 
what he or cgee and knows just what to collect, as well as how 
to collect 
Below we give substantially some notes of observations made 
in his collection, followed by some remarks on other specimens 
at Springfield : 
1. Synbathocrinus Phillips—Some of Mr. Wachsmuth’s 
specimens of a species of this genus show that it is provided 
with a long, slender, pipestem-like ventral tube, or proboscis, 
apparently equaling the arms in length. Also, ‘that a double 
row of minute alternating marginal pieces extends up within 
the ambulacral furrows of the arms, apparently all their length. 
We are not aware that these characters have been hitherto 
noticed in any of the publications on this genus, It will be 
seen, however, farther on, that minute marginal pieces probably 
occupied the furrows along the inner side of the arms of other 
types of Crinoidea, as well as this. 
ally fine sega of the typical species of this genus (G4. 
tuberosus) in Mr. Wachsmuth’s collection, from Cr awfordsville, 
Ind., show the slender pendent arms much more distinctly than 
any we had before seen, and from these it seems evident that 
termed pseudobrachial appendages, or false arms, In cleari 
away the matrix of this specimen, we had cut just far enou 
to expose Ph oi se Ne of the arms on bah side of the deep ambula- 
cral furrow, so tnat each of these edges presents the appearance 
of being a separate and distinct, very slender arm, compo 
of a single series of pieces, and without any ambulacral furrow 
on the outer or ventral side; whereas there is a well-defined 
