72 TEREESTRTAL CARBONIFEROUS ARACHNIDA. 



and strongly compressed and crested. But by enttino- away the matrix im])ed- 

 dino" llie limbs of examples of A. wooila-nrdi in tlie British Mnsenm, Dr. F. A. 

 Bather has shown that tlu^ appendap^es are constructed as in the type of A. lafipes. 

 Since Dr. Bather drew my attention to this fact I have been able, thronoh the 

 kindness of Dr. Henry AVoodward, to examine a specimen from Sparth, near 

 Rochdale, belongino^ to ]Mr. W. A. Parker, which resembles those from C'oseloy and 

 Crowcrook in the structure of the legs and in other particulars. Although Mr. 

 Gill was perfectly justified on the evidence in describing his specimen as the repre- 

 sentative of a new species, I think Dr. Bather is right in his belief that lafijyes 

 must be regarded as a synonym of nwoil/i'drdi. The specimen from Sparth shows 

 the dorsal surface. The median ridge and the paired muscular impressions in the 

 terga of the opisthosoma are clearly displayed. The pleural plates, however, are 

 better preserved than in the type of A. iroodwanll from Coseley, and those in the 



Fio. 37. — Anihracosiro fritsclii, Pocock ; dorsal surface, nearly eig'lit times nat. size. — Coal Measures ; Coseley, 

 near Dudley. British Museum (No. I. l.")5G). From Geol. Mag. [4], vol. x, j). 400. 



anterior portion of this region are shown to be, not triangular, as I described them, 

 but four-sided, although the anterior margin is considerably shorter than the 

 posterior margin. Another interesting feature to be noticed is the presence of a 

 narrow tergal plate in front of the eighth from the end on the dorsal side as in 

 Eophrymis and Kreisclipvia. 



Measurements in mm. — Total length abont 20 ; carapace about 5"5; o})isthosoma, 

 including the two narrower terga in front of the seventh from the end, 14'5 — 

 without these two terga 18 ; width ; length of femur of fourth leg 4, width 2. 



The known distribution of A. woodwavdi is as follows : Coseley, near Dudley, 

 specimens in the British Museum Nos. I. 1551 (type), I. 1553, I. 1554, formerly 

 belonging to the Collection of Mr. H. Johnson ; Sparth, near Rochdale, specimen 

 belonging to Mr. W. A. Parker; Crowcrook, near Newcastle, the type of .1. 

 lati])es in the Hancock Museum. 



