HAPTOPODA. 



41 



pairs of impressions, the anterior pair of the first small and widely separated, the 

 posterior pair larger and closer together; those of the other terga equidistant 

 from the middle line and in approximately the same straight line as the posterior 

 pair of the first large tergal plate. 



Measurements in mm. — Total length, exclusive of cucullus and caudal elonga- 

 tion, 5-5 ; length of carapace, excluding cucullus 2, width about 2-5; length of 

 opisthosoma 3' 5, width 2-8; length of first leg about 4-5, of third leg about 4. 



Coseley, near Dudley. 



Type and only known specimen in the Collection of Mr. Walter Egginton 

 (No. 6). 



This specimen, in a split nodule of clay ironstone, shows very clearly the 

 dorsal surface with apparently the entire cucullus, portions of four pairs of 

 ambulatory appendages and a short two-jointed caudal process. 



Fiq. 14. — Poliochera alticeps, sp. n. ; dorsal surface, showing the muscular impressions on the carapace and 

 on the terga of the opisthosoma, six times nat. size.— Coal Measures; Coseley, near Dudley. W. 

 Egginton Collection. 



Although the type species of the genus Poliochera, namely P. punctulata, 

 Scudder, shows no cucullus and is described as having the carapace flat, I think it 

 probable that P. alticeps belongs to the same genus. Apart from the convexity of the 

 carapace P. alticeps may be distinguished by its much smaller size, P. punctulata 

 measuring 15 mm. in total length, of which the carapace is 6. 



Order HAPTOPODA, nov. 



No constriction between the prosoma and the opisthosoma, these regions 

 apparently movably jointed together ; the posterior end of the prosoma as wide as 

 the anterior end of the opisthosoma. Carapace of prosoma approximately as wide 

 as long, without trace of transverse grooves indicating segmentation. Opisthosoma 

 longer than wide, narrowed posteriorly, rounded at the extremity, exhibiting in 



6 



