I 38 THE AMERICAN NATURALIST. [Vor. XXXIV. 
A’. Upper margin of meral joints of ambulatory legs spinulous 
L. distinctus Rathbun G 
Genus Micropanope Stimpson. 
Key to Species. 
A. Second normal tooth of the antero-lateral margin absent 
M. sculptipes Stimpson SG 
A’. Second normal tooth of the antero-lateral margin present 
M. xanthiformis (A. Milne Edwards) 27(CZ7) 
Genus Glyptoplax Smith. 
Key to Species. 
A, Last tooth of lateral margin small but well marked. Median lobe of 
the upper orbital margin strongly arcuate 
G. smithii A. Milne Edwards M(CH)G 
A’, Last tooth of lateral margin rudimentary. Median lobe of the upper 
orbital margin subtruncate. . G. pusilla (A. Milne Edwards) G : 
Genus Rhithropanopeus Rathbun. . . . R. harrisii (Gould) WMSG 
Genus Neopanope A. Milne Edwards. | 
Key to Species. 
A. Dactylus of larger hand with a large basal tooth 
N. Pere (Kingsley) G 
A’, Dactylus of larger hand without a large basal too 
B. Fingers white or light horn-color. KERESE teeth sharp and 
much produced . N. texana (Stimpson) SG 
B’. Fingers black or divi colend, in we males. Antero-lateral teeth 
blunter and less produced . . W. texana sayi (Smith) MS 
Genus Hexapanopeus Rathbun 
H. angustifrons (Benedict and Rathbun) MSG 
Genus Eupanopeus Rathbun. 
Key to Species. 
A, Carpus of cheliped with a groove parallel with its distal margin. Color 
of immovable finger not eee. beyond the line of color on the 
movable finger. . . E. occidentalis (Saussure) S 
A’, Carpus of cheliped without VEO: Color of immovable finger extend- 
ing beyond the line of color on the movable finger 
E. herbstii (Milne Edwards) MSG 
Genus Eurytium Stimpson. . . . . . . . E: limosum (Say) MS 
Genus Menippe de Haan. 
Key to Species. 
A. Surface of carapace almost smooth. Antero-lateral teeth or lobes 
shallow or little projecting . . M. mercenaria (Say) M(CH)SG 
