356 The American Geologist. May, ism 
genera ilre distributed among several families. A full list ofthespecies 
is given will) their stratigraphical horizons. The forms are ;ill de- 
scribed with greal minuteness and are finely figured, nol only ;is togen- 
eral physiognomy, but especially as regards anatomical structure. An 
interesting fad in respecl to the geographical distribution of the species 
is thai the forms which are among the commonest in England are the 
rarest in Gotland, and vice versa. Similar peculiarities in the range of 
many of the Carboniferous forms had already been known among the 
American crinoids. 
The facts broughl <>ut by the careful review of the Swedish material 
will change very considerably many opinions now held in regard to cer- 
tain structural features of the stalked echinoderms. A consideration 
of Pisocrinus compels a complete change in the orientation of the calyx, 
and enables t his genus to be compared for the first time with other 
Monocyclica. Another point of great interest is the foundation on a 
scientific basis of the nomenclature of the skeletal parts in the Calceo- 
criuidae, a group which has Iohl;' remained a morphological anomaly. 
A more rational classification than has heretofore been suggested has 
been prepared lor the Inadunata in the establishment of two ureal sub- 
groups based upon the presence or absence of infrabasals. These are 
the Monocyclica and Dicyclica. 
Taken as a whole, the "Crinoidea of Gotland" may be regarded as 
one of the most valuable paleonfological contributions which has ap- 
peared for a longtime. It indicates clearly one of the most fruitful 
lines along which this branch of science is progressing, and presents a 
marked contrast to most of the papers passing under the name of pale- 
ontological publical ions. 
Description* of Some New Species of Invertebrates from tin Paleozoic Rocks 
of Illinois and adjacent States, By S. A.Milleb and Wm. F. E. Gukley. 
(Bulletin No. :!. Illinois Slate Museum of Natural History, X] pp.. 
Springfield, 1894.) Under the auspices of the State of Illinois. Messrs. 
Miller and Gurley describe as new some sixty fossils, chiefly from the 
Carboniferous terranesof the Mississippi basin. Prom the very indiffer- 
ent diagnoses of the species it would be almost impossible to recognize 
many of them, but with the figures it is easily seen that no less than 
three-fourths of the so-called "new species" have already been fully de- 
scribed, while nearly a dozen of the ''types" are manifestly loo imper- 
fect to deserve recognition. There appear consequently only two or 
three valid species out of the three-score noted. Most of the descrip- 
tions are of crinoids. and some of these, although here regarded as new. 
were well described and figured more than a third of a century ago, in- 
cluding species "which are widely known to all persons familiar with 
thi' paleontology of the upper Mississippi valley. 
This Bulletin gives the fifth batch of "new species" which the senior 
author has issued during the past two or three years. Altogel her 1 lie re 
have been proposed in the series several hundred "new" generic and 
specific titles to which this author has appended his name. Chiefly to 
