24 THORELL & LINDSTRÖM, SILURIAN SCORPION FROM GOTLAND. 



1. P. nuncius Thor. et Lindstr. 1884. 



2. P. sp.^) 



Subordo II. DIONYCHOPODES n.') 



Last joint of tarsus sub-cylindrical or clavate, obtuse and provided with two 

 movable claws at the tip. 



Ser. I. ANTHRACOSCORPII n.^) 



Anterior margin of cephalothorax generally (always?) produced into a small cen- 

 tral projecting point. Dorsal eyes, in general, very large, situated eitlier in front of 

 the lateral eyes or between them, not far from the anterior margin of cephalothorax. 

 (Sternum composed of three separate plates; maxillary lobes replaced by two separate 

 plates or sternites [?]). — Carboniferous. 



Fam. CYCLOPHTHALMOID/E n. 



Dorsal eyes very large, situated in front of the lateral eyes, and forming with them 

 almost a circle which occupies a great part of the cephalothorax. Rhachis of the pec- 

 toral combs formed of few (. . . 4 . . .) plates; no intermediate lamellse (plates between 

 the rhachis and the fulcra of the corab-teeth). 



Gen. OYCLOPHTHALMUS Corda 1835. 



, \. C. senior Corda 1835. 



2. C. Sternhergii (Corda) 1839. 



3. C. Kralupensis n.*) 



Fam. EOSCORPIOID/E (Scudd.) 1884. 



Dorsal eyes situated nearly in the middle line between the lateral eyes, which 

 form two groups or rows towards the antero-lateral angles of the cephalothorax. 

 Rhachis of the combs composed of numerous lamellae. 



Gen. EOSCORPIUS Meek & Worthen 1868. 

 No intermediate lamellse in the combs. 



') The Sootch species, discovered by Dr Huntee, and not yet named. If tliis species is provided with eyes, 

 and if P. nuncius should prove to be destitute of eyes, a new genus must of course be formed for the 

 reception of the former species. 



'■') dis, twice; oVdI, claw. 



^) avd-Qa^, coal; oitOQnLog^ scorpiou. 



*) See above, p. 17, note 2. 



