Palaeozoic Arachnida of North America. 



81 





Fig. 4O. 

 Figure 46. — Polyochera glabra 

 n. sp., holotype, U. S. N. M 

 No. 3 798 1 , dorsal surface. X -p 



Polyochera glabra n. sp. 

 Plate VII, figs. 39, 40 ; text fig. 46. 



U. S. National Museum No. 37981. Obverse shows the cucullus, 

 cephalothorax, abdomen and part of what is probably the second 

 and fourth leg. The reverse shows the 

 somewhat deformed coxae of which only 

 those of the third and fourth pair are 

 sufficiently clear to show that they have 

 the same arrangement as in P. punc- 

 tidata, the abdomen with an entire, not 

 segmented pleura and the fragments of 

 the same legs. 



Total length 13.8 mm. Cucullus 1.05 

 mm. long, 3.5 mm. wide. Cephalothorax 

 4.3 mm. long, 5.7 mm. wide, with 

 rounded corners and striaght posterior 

 and anterior edge. Between the oval 

 abdomen and the cephalothorax is a 

 deep groove. The tergites are divided 

 into three fields by longitudinal ridges. 

 Whole body smooth. 



Found in the Pennsylvanic (Lower Allegheny) of Mazon Creek, 

 Illinois. 



Holotergidae new family. 

 Abdomen covered with an entire shield, probably corresponding 

 to the third to sixth segments. 



Genus Curculioides Buckland 1837. 

 With the characters of the family. 



Key to the Species of Curculoides. 



1. Abdominal shield with a median longitudinal ridge 



C. scaber 

 + abdominal shield without a median ridge 2 



2. Cephalothorax wider than long 



C. sulcatus 

 + cephalothorax as wide as long 



C. ansticii 



Curculioides ansticii Buckland. 



C. ansticii Buckland, Bridgewatcr Treatise (ed. 2), Vol. II, 1837, 

 p. 76, pi. 46, fig. I. Pocock, Carb. Arachn. 1911, p. 39, pi. II, fig. 7 ; 

 text figs. 12, 13. 



Found in the Coal Measures of Coseley, near Dudley, England. 



Trans. Conn. Acad., Vol. XVIII. 6 Jone, 1913 



