130 BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



H*. Carapace of female two and a half times as wide as long. 

 Propodus of last two legs tapering at distal end almost to 



width of proximal end of dactylus tubicola, p. 165. 



F*. Propodus of third leg distinctly longer than wide. 

 G 1 . Carapace very convex, sloping from the middle in all directions. 

 Thumb strap-shaped. Manus much Avidened toward distal 



end. Fingers with wide, triangular gape larnharti, p. 149. 



G*. Carapace more or less flattened, not sloping from the middle 

 in all directions. Thumb not strap-shaped but diminishing 

 from base. 

 H 1 . Thumb deflexed. 



J l . Merus of third leg short and stout, about twice as long as 



wide cJiactopterana, p. 151. 



J*. Merus of third leg elongate, much more than twice as 



long as wide. 

 K 1 . Thumb subtriangular, the terminal spine forming one 



point of the triangle. 

 L l . Two short, well separated cardiac crests. Thumb 



slightly deflexed raldiricnsis, p. 154. 



L 2 . A single, bilobed cardiac crest. Thumb markedly de- 

 flexed occidcntaUs, p. 155. 



K 1 . Thumb composed of a short, high, quadrate base, fol- 

 lowed by a short, slender spine at lower angle. 

 L 1 . Palm strongly widened distally, lower margin nearly 



straight. Cardiac ridge blunt brcvipollcx, p. 109. 



L*. Palm very convex below. Cardiac ridge acute. 



affinis, p. 108. 

 H*. Thumb not deflexed. 



J 1 . Thumb straight or nearly so. Lower margin of palm not 



convex. 

 K 1 . A cardiac ridge present. No large spine on ischiurn of 



third leg in male franciscana, p. 101. 



K'. No cardiac ridge present. A large spine on ischium of 



third leg in male rctincns, p. 139. 



J*. Thumb curved upward distally. Lower margin of palm 



convex. 



K 1 . Carapace more than twice as wide as long. Dactylus 

 of third leg longer than propodus. Fingers of 



female gaping hiatus, p. 164. 



K*. Carapace less than twice as wide as long. 



IA Carapace laterally tapering. Sides of male abdomen 



convex schinilti, p. 1G2. 



L*. Carapace laterally subtruncate. Sides of male abdo- 

 uieii not convex, first segment very wide at base. 



wcymoutlti, p. 106. 

 B". Poll ex of cheliped represented only by spiniform angle of palm. 



monodacti/la, p. 136. 



Analogous species. Besides several pairs of analogous species on 

 opposite sides of the American continent, there are also in the genus 

 Pinnixa close resemblances between certain species in the northern 

 and southern hemispheres, as indicated below. 



