of the Pacific Shores of North America. 517 



ORCHESTIA PICKERINGIT. Dana. 



Orchcstia Pickeringii, Dana; U. S. Exploring Expedition, Crust, ii. 882, 

 PI. LIX. f. 9. Proc. Acad. Nat. ScL P/iilad. VII. 177. 



California, (Le Conte.) 

 Mus. Expl. Exped. 



ORCHESTIA TRASKIANA. Stimpson. 

 Orchestia Traskiana, Stimpson ; Proc. Cal. Acad. Nat. Sci. i. 90. 



Male, with the inferior antennae about one third as long 

 as the body ; the flagella forming more than half their 

 length, and consisting of fourteen oblong joints ; superior 

 antennas reaching to the extremity of the second joint of 

 the inferior ones. Feet of the first pair with a small hand 

 with a produced lobe at the inferior angle, and a minute 

 finger, as in O. littorea, pollicifera, etc. ; fourth joint and 

 that preceding it, each with a small tooth below. Feet of 

 the second pair with an ovate hand, with no teeth on the 

 oblique, convex, spinous palm, which terminates posteriorly 

 in a slight notch ; finger about half as long as the hand, 

 smooth and much curved. In the female the first pair of 

 hands resemble those of the male, except in being smaller, 

 having less produced lobes, and a comparatively longer 

 finger ; those of the second pair with a small elongated 

 hand, with a rounded extremity and a rudimentary finger 

 applied at about the middle of the lower edge. In both, 

 the feet of the sixth and seventh pairs are about equal in 

 length. Eyes rounded, black. Color, light gray,- some- 

 times greenish or brownish, always very pale. Length, 

 three fifths of an inch. 



This species has much resemblance to O. Pickeringii 

 and O. Pugettensis, but is clearly distinct from both in the 

 following characters. From the former, it differs in the 

 greater length and obliquity of the palm in the hand of the 



