18 PROCEEDINGS OF THE AMERICAN ACADEMY 



This interesting species was found in some abundance by Rev. F. S. 

 Harvey in the subconglomerate coal measures about six miles north- 

 east of Fayetteville. It differs from all the other species in the 

 remarkable posterior narrowing of the cephalothorax. A fuller de- 

 scription and figure will be given at another time. 



Anthracomartus jmstidatus nov. sp. Cephalothorax narrowing some- 

 what forward. Abdomen longer than broad, oval, broadest in the 

 middle, the longitudinal ridges converging regularly and considerably 

 in straight lines, the whole surface of body closely covered with very 

 irregularly polygonal sunken cells, giving the whole body a pustulate 

 appearance. Length la mm. ; greatest breadth 7.5 mm. ISIazon 

 Creek, 111. 



This sjiecies was received from Mr. R. D. Lacoe (No. 1752), and 

 differs conspicuously in its rough surface structure from all other 

 species. A fuller description is deferred. 



Fam. EOPHRYNOIDiE Karsch. 



Cephalothorax quadrate, narrowing strongly in front, or triangular, 

 less than one third the size of the full abdomen, broken dorsally into 

 many plates. Coxfe radiating from a median furrow. Abdomen ovate 

 orbicular, much broader than the cephalothorax, from which it is sep- 

 arated laterally by a distinct constriction ; segments nine or ten in 

 number, some of the basal segments obscured below, the dorsal plates 

 either broken by irregular longitudinal sutures into one median and 

 two lateral fields, or furnished with many longitudinal series of stout 

 tubercles, or both ; the penultimate and antepenultimate segments 

 bearing lateral terminal spines. 



Krkisciieria Gcinitz. 



Cephalothorax subquadrate, with three large median plates, one in 

 front and two behind, and on each side three smaller lateral plates. 

 Dorsum of abdomen broken by oblique sutures, crossing each segment 

 laterally subparallel to the lateral margin, into a median and lateral 

 fields, of which the median is about as large as the combined lateral 

 fields. 



Kreischeria Wiedei Geinitz, Zeitschr. deutsch. geol. Gesellsch., 1882, 

 pp. 238-242, pi. 14, figs 1, 2. Zwickau, Saxony. 



This species was referred correctly by Geinitz to the vicinity of 

 Eophrynus, but by Karsch considered as belonging to the Opiliones 

 in the neighborhood of Trogulus. The structure of the cephalothorax, 

 though very different in general appearance from that of Eophrynus, 



