308 S. Richardson — Isopods of tJie Bermudas. 



antennie is also shorter. In the female of L. exotica the antenn£E do 

 not quite reach the extremity of the body ; in the female of L. 

 haudiniana they do not quite reach the extremity of the thorax. 

 In the female of L. exotica the peduncle of the antennae extends 

 only to the posterior margin of the second thoracic segment ; in 

 the female of L. haudiniana the peduncle of the antennae does not 

 extend beyond the posterior margin of the first thoracic segment. 



The species recently described by Mr. Moore* as Ligia gracilis, 

 found at Porto Rico, is identical with Ligia haudiniana. The type 

 specimens of Ligia gracilis, which have been placed in the U. S, 

 Nat. Museum, have been carefully examined by Mr. Moore and 

 myself since the publication of his paper, and exhibit the same 

 characters found in Ligia haudiniana. The leg of the first pair, 

 figured by Mr. Moore, is the leg of the female, which does not pre- 

 sent the row of stifle hairs on the carpus and merus, as found in the 

 male. 



Although Mr. Moore did not investigate the differences existing 

 between L. exotica and L. haudiniana, and was misled by such 

 eminent authorities as Dollfus and Budde-Lund,f who consider the 

 latter species a synonym of the former, yet he regarded his specimens, 

 when compared with specimens of L. exotica, as specifically distinct. 

 Although Ligia gracilis cannot be considered new, j^et the fact that 

 Mr. Moore considered his specimens specifically different from L. 

 exotica, and his identification of them later with L. haudiniana give 

 additional weight to the view that Ligia haudiniana is distinct from 

 Ligia exotica. 



* Report U. S. Fish Commission, ii, pp. 161-176, pi. 7-11, 1901. 

 f It is very doubtful if Budde-Lund ever bad specimens of L. baudiniana. He 

 places L. baudiniana in tbe synonymy of L. exotica, witb a question mark. 



