106 BULLETIN 138, UNITED STATES NATIONAL MUSEUM 



Eyestalks triangular or oblong, flattened; cornea dorsal, median, 

 small or absent. Rostrum short, triangular, rudimentary or absent. 



Jurassic; Cretaceous; Eocene; Oligocene; Miocene; Pleistocene; 

 Recent. 



This genus occurs from the Lias down to Recent. About 90 fossil 

 species have been described and 78 Recent. Five species are now 

 living on the west coast of America; only one of these, C. gonioph- 

 thalma, from deep water, 192 to 322 fathoms, has the large tubercles 

 or raised sockets for hairs on the outer surface of the palm such as 

 are present on 5 of the 12 fossil species described below from the 

 manus. G. longimana is the Recent species which in its elongate 

 wrist and palm a]:)proaches C. oregonensis of the Miocene. 



KEY TO THE FOSSIL SPECIES OF THE GENUS CALLIANASSA ON THE PACIFIC SLOPE OF NORTH 



AMERICA 



Species in tchich the manus is knoion 



A\ Manus with the whole or a porUon of its outer surface roughened with 

 tubercles. 

 B\ Tubercles scattered over outer surface of manus; distant, not large. 

 Manus short, with a hollow at distal end of outer surface. Propodal 

 finger very long, much longer than hand. 



^ bandonensis (Oligocene), p. 118. 



B . Tubercles restricted to lower half of outer surface of manus. 



C\ Tubercles occupying greater part of lower half of outer surface of 



manus; upper and lower margins dentate; proximal margin 



^ oblique umpquaensis (Eocene), p. 110. 



C . Tubercles confined mostly to the lower distal quarter of outer sur- 



face of manus. 

 T>\ Fingers equally wide at base, not gaping. Upper and lower 

 margins of palm diverging distally in male. Tubercles 



^ elongate twinensis (Oligocene), p. 115. 



D . Dactylus broader at base than fixed finger ; fingers separated at 

 base ; a spine or tubercle on palm in gape between fingers. 

 E\ Palm elongate; proximal margin oblique. 



^ knapptonensis (Eocene), p. 112. 



E . Palm shorter ; proximal margin vertical. 



.8 ,, . . clallamensis (Oligocene), p. 114. 



A. Manus with its outer surface smooth (or nearly so). 



B\ Manus with a large backward-pointing tooth on upper proximal corner 

 and another tooth in gape close to dactylus. 

 2 cowlitzensis " (Eocene), p. 113. 



B . Manus without a large backward-pointing tooth on upper proximal 

 corner. 

 C. Manus broader than long. 



D\ Propodal finger occupying half the height of distal end of palm. 

 ,., „ ^ , ^ Incerta (Eocene), p. lOS. 



D . Propodal finger occupying not more than a fourth the height of 

 . distal end of palm kewana (Eocene), p. 109. 



« Outer layer of shell not preserved. 



