Editorial Miscellany. 87 



semi-circular, margin consisting of three subequal arcs and produced 

 into rather strong spines that extend obliquely outward ; lateral arcs 

 spinous ; eyes prominent, directed outward. Glabella twice as long as 

 wide, with two lateral lobes on each side, the anterior ones somewhat 

 oval in outluie, the posterior ones situated between the eyes, and 

 the central lobe somewhat circular in outline ; glabella terminatmg 

 posteriorly in a short spine, which projects over the middle lobe of the 

 trilobite to the fifth segment ; neck furrow rather distinctly marked. 



Fig. 0,—Acidaspis O' Nealli. 



Thorax about twice as long as the cephalic shield, and exclusive of 

 the produced extremities of the pleurse, a little longer than wide ; 

 consisting of eight segments ;. middle lobe strongly convex ; lateral 

 Jobes depressed ; pleurse terminating in rather long mucronate spines 

 directed outward and backward, posterior ones a little longer, 

 and directed more nearly backward. 



Pygidium small, axis short, sides flat, except a ridge that extends 

 obliquely backward and outward from the anterior segment of the 

 mesial lobe across each, and terminates in a prominent, rounded, diverg. 

 ing spine. Between these two projecting spines the specimen shows 

 no spines, though it may have had four minute ones of about equal 

 size. There are apparently two mmute spines on each side of these 

 projecting spines. 



Length of specimen, exclusive of spines, 0.65 inch; breadth, 0.45 

 inch ; breadth between the eyes, 0.20 mch. 



The specific name is given in honor of the collector, J. Kelly O'lSTeall, 

 of Lebanon, Ohio, who found it in the upper part of the Cmcinuat 

 Group, near Lebanon. 



EDITORIAL MISCELLANY. 



The Cincinnati Museum of Science and Art. — Mr. Henry Pro- 

 basco, to whose taste and munificence the city of Cincinnati already 

 owes so much, recently, upon two public occasions, has announced the 

 fact that he and other gentlemen of wealth have in contemplation the 



