ANTHRACOSCORPIO. 



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doubt a little more than three times the length of the carapace, for without 

 the post-anal spine it is about twice and a half times the length ; segments one to 

 five gradually increasing in length ; the first segment the widest, much wider than 

 long, the second and third also wider than long, the fourth about as long as wide, 

 the fifth longer than wide; the upper surface of the segments normally and 

 strongly keeled, the superior keels converging on segments one to four, almost 

 parallel on segment five; the upper surface hollowed between the superior 

 keels, which, like the superior lateral keels, are granular. Chela? slender, humerus 

 and brachium each much shorter than the carapace, which is slightly shorter than 



FiG. 6. — Anthracoscorpio luthijovmis, s\y. n.; four times nat. size. -—Coal Measures; Sparth, near Rochdale. 



W. A. Parker Collection. 



the manus with its digits. Maims slender, apparently keeled above and slightly 

 wider than the brachium. 



Measurements in mm. — Total length, exclusive of post-anal spine and cheliceras, 

 21 ; length of carapace 3'5, of abdominal portion of opisthosoma 8 ; of caudal 

 segments one to five about 10; length of first caudal segment 1"3, of second l - 6, 

 of fourth 2, of fifth 2-5; width of first 2 - 5, of second 2 +, of fifth 2 — ; 

 length of manus and digits about 4. 



Coal Measures of Sparth, near Rochdale. 



Type above described in the Collection of Mr. W. A. Parker (PI. II, fig. 1). 



I have selected this specimen as the type because it shows the structure of the 

 dorsal surface very clearly. Only fragments of the legs are preserved, but the 

 details of the chelas of the left side can be deciphered. 



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