THE GEAPSOID CKABS OF AMERICA. 131 



ANALOGOUS SPECIES OF PINNIXA ON OPPOSITE SIDES OF THE CONTINENT. 



Atlantic. Pacific. 



brcvipollex. affinis. 



faxoni. transrcrsalis. 



cylindrica. franciscana. 



sayana. occidcntalis. 



Jloridana. longipcs. 



ANALOGOUS SPECIES OF PINNIXA IN NORTHERN AND SOUTHERN HEMISPHERES. 



North Atlantic. South Atlantic. 



cristata. } 



monodactyla. } patagoniensis. 



North Pacific. South Pacific. 



occidcntalis. valdicicnsis. 



PINNIXA TRANSVERSALIS (Milne Edwards and Lucas). 



Plate 29, figs. 1-3. 



PinnotJiercs transvcrsalis MILNE EDWARDS and LUCAS, d'Orbigny's Voy. 

 Anigr. Mer., vol. G, pt. 1, 1843, p. 23 (type-locality, Chili; type in Paris 

 Mus.) ; vol. 9, atlas, 1S47, pi. 10, figs. 3-3e. NICOLET in Gay, Hist, de 

 Chile, Zool., vol. 3, Crust., 1849, p. 15G. 



Pinnixa, transversal is MILNE EDWARDS, Ann. Sci. Nat., ser. 3, Zool., vol. 20, 

 1853, p. 220 [186], pi. 11, fig. 5. MIEKS, Proc. Zool. Soc. London, 1881, 

 p. 70, part; not specimens from Sandy Point. OKTMANN, Zool. Jahrb., 

 Syst., vol. 10, 1897, p. 329 (specimen described probably not a type). 

 LENZ, Zool. Jahrb., Suppl., vol. 5, 1902, p. 7G4. RATHBUN, Proc. U. S. 

 Not. Mus., vol. 38, 1910, pp. 546 and 588, pi. 46, fig. 1 (after Milne 

 Edwards and Lucas). 



Pinnixa panaincnsis FAXON, Bull. Mus. Comp. Zool., vol. 24, 1S93, p. 158 

 (type-locality, Panama; type in M.C.Z.) ; Mem. Mus. Comp. Zool., vol. 

 IS, 1895, p. 30, pi. 5, figs. 1, la, 1&. 



Diagnosis. Sharp ridge entirely across hinder part of carapace. 

 Ultimate segment of maxilliped much longer than penultimate. 

 Chelae weak, fingers not gaping. Extremity of male abdomen much 

 enlarged, last segment semicircular. 



Description of male. Carapace mostly smooth and punctate, gran- 

 ulated at sides; lateral angles forming a prominent shoulder, below 

 which the carapace narrows at the sides; a groove behind the gastric 

 region, otherwise carapace flat up to a prominent, sharp ridge across 

 carapace at the cardiac region and ending at bases of last feet; be- 

 hind ridge, carapace is inclined at angle of 45. Front deflexed, 

 transversely grooved, not produced. Orbits with a strong dorsal in- 

 clination. Antero-lateral margin a prominent granulate ridge in 

 outer half only. Posterior margin short, concave. 



Second segment of palpus of maxilliped very short, third very 

 long, reaching proximal end of mems. 



Chelipeds small; carpus squamose and setose anteriorly; chelae 

 laterally compressed, a crest of tubercles on upper border, a longi- 



