CYCLOPHTHALMCS. 19 



Archseoctonus tuberculatus (Peach). 



1883. Eoscorpius tubercidatiis, B. N. Peach, Traus. Eoy. Soc. Edjub., vol. xxx, ji. 398, pi. xxiii, 

 figs. 8— 8 7(. 



Possibly not belonging to the genus Archseoctonus, since the ambulatory 

 appendages are unknoAvn and the chelae unfigured and indifferently described. 

 Specifically A. tuhercidatus differs from .1. glaber in having the terga of the 

 abdominal portion dotted with small tubercles, and ornamented with two rows of 

 larger tubercles along the posterior margin. 



Total length supposed to be about 62 mm. 



This species was based upon several pieces obtained from the Coal Measures at 

 Blair Point, near Dysart, and from the Calciferous Sandstone Series from Redhall 

 and Cramond, near Edinburgh. 



Genvs CYCLOPHTHALMUS, Corda. 



1835. Cijdojjhthalmus, A. J. C. Corda, Verh. Ges. Mus. Bohm., p. 36. 

 1904. Cydophthalnms, A. Fritsch, Palseoz. Araclm., pp. 65 — 68. 



For reasons already given (p. 12) this genus is here recorded for the reception 

 of the Scorpion described by Peach as Eoscoyplus englijjjtiis. 



Cyclophthalmus euglyptus (Peach). Text-figure 4. 



1883. Eoscorpius eiujlyptus, B. N. Peach, Traus. Eoy. Soc. Ediub., vol. xxx, pp. 4U2 — 404, pi. xxii, 

 figs. 3 to 3 d. 



This species was based on a single specimen obtained near the base of the 

 Cementstone Group, Calciferous Sandstone (Lower Carboniferous), near Langholm, 

 Dumfriesshire, in Scotland. The ventral surface of the prosoma, with complete 

 chelicera3 and clielge and incomplete walking legs, is exposed, the structure of the 

 coxa3, sternum, genital operculum and pectines being well shown. 



The chelicerge and chelse are large, the chelae being heavy and massive ; the 

 hand is ovally elongate in profile view, considerably longer than wide, and a little 

 wider than the brachium ; the fingers are arcuate and basally lobate, the movable 

 being but little longer than the back of the hand. The sternum is pentagonal ; 

 the pectines are large and ornamented with squamiform sculpture. 



Judging from Peach's restoration the measurements in mm. of the chelse are as 

 follows : 



