90 CRUSTACEA FROM THE BAHAMAS 



Outer antennae : peduncle a little longer than that of inner, small 

 spine on basal joint. Flagellum. one-third longer than long ramus of 

 inner antenna, spinose portion of scaphocerite a little longer than the 

 peduncle. Flabellar portion (scale) a trifle shorter ; not quite so long 

 as the peduncle. 



Third pair of maxillipedes do not reach beyond end of peduncle of 

 the outer antennae. 



First pair pereiopods: large chela of largest specimen has a 

 length of i8 mm., of smallest specimen 8 mm. The large chela has a 

 somewhat quadrangular depression on the outer surface, the distal 

 end of which is continued upwards into a well-marked depression on 

 the dorsal margin and extends backward as a groove along the inside 

 of the dorsal siuface. A distinct but less marked depression on the 

 ventral margin. Inner surface of the hand slightly hairy, outer surface 

 nearly smooth. Fingers contorted, color in alcoholic material pale 

 blue. Movable finger slightly longer than thumb. In the small 

 chelapod, which may be on the right or left side, the finger is 

 one-third the length of palm. Carpus of chelapods short. Meros 

 triangular in section ; ends distally in a sharp spine on the outer and 

 inner angle. Distal end of meros reaches to end of peduncle of outer 

 antennae. 



Second pair of pereiopods very long. Distal end of meros reaches 

 beyond antennal peduncle. First and second joints of carpus sub- 

 equal, each a little longer than third and fourth together. Third and 

 fourth subequal. Fifth about two-thirds length of first ; equal in length 

 to fourth and fifth together. Finger about one-half length of thumb. 

 (Fifth joint a little too short in figure.) 



Third and fourth pereiopods short and stout, not quite reaching to 

 distal end of meros of second. Length of meros less than three times 

 its breadth. Carpus one-half length of meros. Both carpus and meros, 

 with spines on lower margin of distal end. Propodos serrated on pos- 

 terior surface. 



Fifth pair of pereiopods shorter and more slender. Telson with 

 median furrow. Two small spines on either side of furrow. Outer 

 plate of uropod minutely serrated on end. A sharp spine on its outer 

 distal angle. 



Principal variations from A. hippothoe.: 



In new variety: peduncle of outer antennas longer than that of 



