84 TERRESTRIAL CARBONIFEROUS ARACHNIDA. 



of the last are quite small, and there is no evidence that there was a median 

 unpaired extension of the last beyond the anus, which is not shown. The width 

 of the opisthosoma is about eqtial to its length from the posterior end to the 

 apex of the triangular intercoxal plate, the length from the latter point to the 

 anterior end of the prosoma being a little longer than the length of the last four 

 segments of the opisthosoma. The sculpturing of the opisthosoma consists of 

 close-set granulation broken up into larger, indefinitely tubercular areas. 



Leg of the fourth pair with its trochanter, femur, and patella almost as long as 

 the entire body ; leg of first pair extraordinarily long and slender, the femur alone 

 exceeding the entire length of the body. 



Measurements in mm. — Total length 6 ; length of the last six segments of the 

 opisthosoma 8, width of the latter region 3*5 ; width of anterior portion of 

 prosoma 3, its length to the anterior groove 1'7 ; femur of fourth leg about 4, of 

 first leg about 7. 



The specimen above described came from the Kiltoung Coal Seam, Ellismuir, 

 Baillieston, in Scotland, and is in the Collection of Mr. Robert Dunlop. 



The type of N. elaveris was from the Coal Measures at Commentry, in 

 France. 



