540 RANKIN. 



These specimens have the characteristic blue tips of the fingers. 

 New to Bermuda. 

 Distribution : Bahamas. 



48. Alpheus bermudensis Spence Bate. 

 (Plate XVII., Fig. 4.) 



Spence Bate, Chalenger, Macrura, p. 547, pi. 98, fig. 3, 1888. 



(a) 3 specimens from dredger, '97. {b) 9 specimens from 

 Bailey's Bay, under rocks at low tide, '98. {c) 2 specimens 

 dredged in 1-2 fathoms at the Flatts, '98. 



Heilprin considers that A. bcrnmdcnsis is the same as A. avarus 

 Fabr. and A. cdzvardsii Audouin. The synonomy of the two 

 latter is probable ; but there are well marked differences in speci- 

 mens -of the same size of A. bermudensis and A. edwardsii. In 

 A. edivardsii there is a deep transverse constriction in the larger 

 chela above and below ; in A. bernmdcnsis only above as shown 

 in the figure (plate XVII., fig. 4). A deep longitudinal furrow 

 is on the inner side near the upper surface of A. bermudensis, 

 none in A. edivardsii (cf fig. 3). The dactyl is longer and less 

 sickel-shaped in A. edivardsii, and on the meros is a spine at the 

 distal inner end. The carpal joints of the second pereiopods 

 also differ, the first in A. bermudensis being shorter than the 

 second, instead of longer, while the third and fourth are propor- 

 tionately shorter than is the case in A. edivardsii. The small 

 chela of A. bcruuidensis is veiy much smaller than the large ; 

 the fingers are about the length of the palm, slightly gaping, as 

 the dactyl has a long slight curve. 



Reported by Heilprin and Spence Bate, who also had a 

 specimen from St. Thomas, W. I. 



49. Alpheus minor Say. 



Say, Jour. Acad. Nat. Sci. Phil., I., p. 245, 18 18. 



Numerous specimens from the dredger, '97, and broken out 

 of coral rock in Castle Harbor, '97 and '98. 

 .• Reported by Heilprin and Ortmann. 



Distribution : Virginia to Panama ; West Indies ; west coast 

 Central America. 



