. Bulletin - United States National Museum. Science. 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
. Bulletin - United States National Museum. Science. 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 , length of rostrum , width of carapace , length of palm , of movable finger 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 MET
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