154 



BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



PINNIXA VALDIVIENSIS Rathbun. 



Plate 33, figs. 1 and 2; plate 34, figs. 5 and 6, 



Pinnotheres transvcrsalis Cunningham, Trans. Linn. Soc. Loudon, Zool., 

 vol. 27, 1S71, p. 492; not P. transversalis Milne Edwards and Lucas, 

 1S43. 



Pinnixa transversalis Miers, Proc. Zool. Soc. London, ISSl, p. 70 (part: 

 specimens from Sandy Point). 



Pinnixa valdiviensis Rathbun, Revista Cliilcna Hist. Nat., vol. 11, 1907, 

 p. 4."), text-fig. 1, pi. 3. figs. 2 and 3 (type-locality, Corral, Valdivia, 

 Chile; cotypes male and female in Museum at Valparaiso, Chile; co- 

 types male, Cat. No. 322G0, U.S.N.M.). 



Diagnosis. — Two short cardiac ridges in male. Transverse hepatic 



ridge. Dactyli of legs 1 and 2 curved, of 3 and 4 straight. Chelae 



smooth. Thumb of male short, deflexed. 



Descrij)tion of male. — Regions faintly indicated, covered with very 



fine granules and scattered punctae, cardiac region with a short, 



blunt, transverse 

 ridge either side of 

 middle; a similar 

 ridge across hepa- 

 tic region. Front 

 not advanced, 

 widening at end. 

 Orbits in front 

 view inclined 

 obliquely down- 

 ward and outward. 

 Chelipeds Ftout, 

 I)ubescent on inner 

 side, palm widen- 

 ing distally, upper 

 and lower mar- 

 gins convex; pol- 

 lex short, triangu- 

 lar, deflexed, a 



ridge above lower margin, two teeth on prehensile edge near end; 



dactylus strongly curved down, edge with a tooth at middle; a slight 



gape when fingers are closed. 



First two pairs of legs narrow, dactyli long, slender, and curved, 



but not strongly so; third leg a little longer than second, but half 



again as wide; fourth pair about as wide as second and a little over 



half as long; dactyli of third and fourth stouter than of first and 



second and nearl}'' straight. 



Abdomen nearly one-third as wide as sternum, sixth segment very 



short, sides concave. 



a c 



Fig. 95. — Pixnixa valdiviensis. a. Abdomen of male (5740), 



X 51 ; 6, LEFT CHELA OF MALE (5740), X 5 ; C, OUTEU MAXIL- 

 LII'ED OF COTVIE, MUCH ENLAUGED. 



