GER. PRO.] 



ARACHNIDA. 



571 



carbonarius, Meek & Worthen, 1868, Am. 

 Jour. Sci. and Arts, 2d ser., vol. 46, p. 

 24, and Geo. Sur. 111., vol. 3, p. 560, 

 Coal Meas. 



FIG. 1066. Eoscorpius carbonarius. Natural size; 

 a, body segment enlarged ; c, comb ; d, same 

 enlarged ; TO, mandibles ; p, pits. 



GERALINURA, Scudder, 1884, Proc. Am. 

 Acad. Arts and Sci., p. 13. [Ety. gems, 

 old ; linon, linen ; oura, tail.] Ce 



o ; non, nen ; oura, ta. epao- 

 thprax ovate, the front rounded, one- 

 third as broad as hinder portion ; palpi 

 large and robust, with interior spines; 

 first two pairs of legs slender, the 

 hinder stout and broad ; abdomen 

 composed of nine joints, the basal three 

 rather short, the others subequal and 

 longer. Type S. carbonaria. 

 carbonaria, Scudder, 1884, Proc. Am. 



Acad. Arts and Sci., p. 13, Coal Meas. 

 GERAPHRYNUS, Scudder, 1884, Proc. Am. 

 Acad. Arts and Sci., p. 13. [Ety. geras, 

 old ; Phrynus, a genus.] Cephalothorax 

 fusiform, angulated in front, nearly as 

 large as the abdomen ; coxae radiating 

 from a median line ; palpi slenderer 

 than the legs, longer than the cephalo- 

 thorax, springing from its extreme front, 

 and of uniform size throughout ; ab- 

 domen subfusiform, composed of nine 

 segments, rounded behind, with no 

 constriction at the base; a large tri- 

 angular post-thoracic plate, crowding 

 the middle of the first five short seg- 

 ments out of a straight transverse line ; 



readily distinguished from Architarbus 

 by its produced and angulate cephalo- 

 thorax. Type G. carbonarius. 

 carbonarius, Scudder, 1884, Proc. Am. 

 Acad. Arts and Sci., p. 13, Coal Meas. 



MAZONIA, Meek & Worthen, 1868, Geo. Sur. 

 111., vol. 3, p. 563. [Ety. proper name.] 

 Cephalothorax moderately convex, sub- 

 quadrangular ; anterior lateral margins 

 rounded, and anterior margin truncated 

 on each side of a small mesial trian- 

 gular projection ; mesial furrow extends 

 forward from the posterior margin, 

 widening and deepening to the front, 

 where it occupies one-third of the 

 breadth, and is partly filled by the oc- 

 uliferous prominence, which bears on 

 each side a large eye ; eyes circular, 

 convex, arranged for looking obliquely 

 forward, outward, and upward; seven 

 or eight abdominal segments, the last 

 one truncated for the tail. Type M. 

 woodana. 



woodana, Meek & Worthen, 1868, Geo. 

 Sur. 111., vol. 3, p. 563, Coal Meas. 



POLIOCHERA, Scudder, 1884, Proc. Am. Acad. 

 Arts and Sci., p. 13. [Ety. polios, hoary ; 

 cheras, to be bereft.] Cephalothorax 

 scarcely longer than broad, slightly 

 narrowing anteriorly, the front square ; 

 coxae radiating from a median line ; 

 legs stout, moderately long; abdomen 

 full, at base as broad as the cephalotho- 

 rax, broadening slightly behind, fully 

 rounded, composed of four segments, 

 the first segment about one-third the 

 length of the others, which are equal ; 

 no abdominal appendages. Type P. 

 punctulata. 



punctulata, Scudder, 1884, Proc. Am. 

 Acad. Arts and Sci., p. 13, Coal Meas. 



Proscorpim, Whitfield, 1885, Bull. Am. Mus. 

 Nat. Hist., vol. 1, p. 183. [Ety. pro, be- 

 fore ; scorpius, a genus.] Cephalothorax 

 with large dorsal eye-lobe ; eyes small, 

 one on each side of the median line ; 

 lateral eyes on ridges, as in living scor- 

 pions ; sixth ventral segment of the 

 preabdomen, counting from behind, 

 large, equal in length and breadth to 

 the corresponding dorsal segment ; an- 

 terior walking limb terminating in a 

 bifid claw ; postabdomen not reversed 

 as in living scorpions. Type P. osborni. 

 Good authorities say this is merely an 

 Eurypterus, with no affinity or resem- 

 blance to a scorpion. With this view 

 the author coincides. 

 osborni, Whitfield, 1885, Bull. Am. Mus. 

 Nat. Hist., vol. 1, p. 184, Waterlime Gr. 

 Synonym, probably, for Eurypterus 

 remipes. 



