292 General Notes. [ March, 
cies of Belinurus, and of Cyclus, two genera new to this conti- 
nent; also a new type probably referable to the Merostomata, 
which may be called Dipeltis. From the Carboniferous beds of 
Pennsylvania there is a new species of Euproops. It need scarcely 
be added that the discovery of these forms, new to our American 
Carboniferous fauna, is a matter of considerable interest. 
Moreover, the specimen of Cyclus shows traces of four or five 
pairs of limbs, apparently of the same nature as those of the larval 
Limuli, proving that Cyclus is in reality, so to speak, a tailless 
Limuloid. We are able also to report the existence of cephalic 
appendages in Euproops, as seen in a well-preserved Luproops 
dane, received from Mr. J. C. Carr, of Morris, Illinois. 
We will add brief descriptions of the new forms, reserving 
figures, fuller descriptions, and measurements for a future occa- 
Belinurus lacoet, n. sp—Cephalic shieldjwith a long lateral acute 
spine on each side extending to a point either opposite or a little 
behind the middle of the urosome (abdomen), or nearly to the base 
of the caudal spine. The urosome much more rounded and shorter 
than in the European B. regine, being about twice as broad as 
long. The caudal spine is long and slender, nearly one-half longer 
than the body, 7. e., longer than the whole body by the length of the 
head. Length of body including caudal spine 33™™ In nodules 
at Mazon creek, Morris, Ill. Collection of R. D. Lacoe. 
Euproops longispina, n. sp—The median lobe of the cephalic 
shield is larger in proportion to the entire shield than in Æ. dane, 
and the eyes are much nearer the lateral margin. Ocelli dis- 
tinctly marked (not before observed in the Carboniferous Limu- 
loids), situated on the median ridge of the median lobe of the head, 
a little behind its anterior termination, and a little in front of a 
line drawn through the compound eyes. The lateral spines are 
much longer than in any specimen of Æ. dane from the Morris, 
Ill., beds, being long and slender, extending nearly or quite to the 
base of the caudal spine. No. 214* Oakwood colliery, Wilkes- 
Barre, Pa. Length of body without the caudal spine 30™™ breadth 
= 37™™> a smaller specimen (Nos. 215* 215°), from Butler mine, 
Pittston, Pa. Collection of R. D. Lacoe. 
Regarding the position of the Illinois and Pennsylvania beds 
containing these fossils, Mr. Lacoe writes me: “The horizon of 
the Pennsylvania specimens of Euproops is much higher than 
that of Mazon creek. The latter is at the very base of the pro- 
ductive coal measures in shale over the bottom seam of coal. 
The specimen from the Butler mine, Pittston, is from shale over 
coal ‘E’ (Mammoth vein), at the top of the lower productive 
coal measures, about 300 feet above, and that from the Oakwood 
colliery is either from the same horizon or the bottom of the 
lower barren measure next overlying it. The shaft from which it 
~ was taken, penetrating both the exact position of the rock con- 
