THE SPIDER CRABS OF AMERICA 19 



Rostrum usually about same length as carapace; palm shorter and 

 fingers longer than in s^^icor/u"s; palm usually twice the length of dac- 

 tylus. 



Description. — Carapace covered with a short pubescence; chelipeds 

 and legs pubescent in small as well as large specimens. Carapace some- 

 what wider across branchial regions 

 than in seticornis. Rostrum slightly 

 ascending, length in small and me- 

 dium-sized specimens about equal 

 to, or less than, that of the post- 

 rostral portion of the carapace, in 

 larger specimens attaining to one 

 and a half or even twice the length 

 of carapace. A small spine directed 

 forward at interior end of basal 



„-• 1 t i i Al • Fig. 4.— StENORYNCHUS DEBILIS, male (15544) 



article of antenna, at the mner phohle or orbital hegion showing basal 

 angle; this spine is larger and antennal article and its small terminal 

 sharper in males than in females. ®"^^' ^ ^" 



The fingers and palm never get so shaggy-hairy as in seticornis. Palm 

 of male cheliped stouter than in seticornis, usually about twice as long 

 as dactylus but varying from one and a half to two and a half times, 

 in the largest specimen. The ambulatory legs of the first pair vary 

 from six to seven and a half times the carapace length. 



Color. — Bright green; lateral portions of carapace and also the 

 feet covered with soft gray down. Fingers reddish. (Milne Edwards 

 and Lucas.) 



Measurements. — Male (15544), length of carapace with rostrum 

 34.6, length of rostrum 20.6, width of carapace 12.6, length of palm 

 15.5, of movable finger 9.8 mm. 



Range. — Magdalena Bay, Lower California, Mexico; Gulf of 

 California; Nicaragua; Panama; Galapagos Islands; Chile (Milne 

 Edwards and Lucas). Low-water mark to 31 fathoms. 



Remarks. — This species has at times been united with seticornis, 

 but the anterior spine of the basal antennal article separates it 

 specifically. 



Material examined. — See table, page 20. 



Genus METOPORHAPHIS Stimpson 



Metoporhaphis Stimpson, Ann. Lye. Nat. Hist. New York, vol. 7, 1860, 

 p. 198 [70]; type, M. calcarata (Say). — A. Milne Edwards, Crust. R6g. 

 Mex., 1878, p. 174. 



Metoporaphis Miers, Journ. Linn. Soc. London, vol. 14, 1876, p. 643; Chal- 

 lenger Rept., vol. 17, 1886, p. 4. 



Carapace triangular, longer than broad, uneven. Rostrum long, 

 very slender, subcylindrical, tapering to a sharp point. Eyes pro- 

 tuberant, peduncles terminating above in a spinule which projects 



