524 RANKIN. 



to find that out of a total of 6i species in this list all but five 

 have already been reported from the neighboring regions. These 

 five are the two new species, Nika bernindcnsis and Alpheus 

 lancirostris, and the eastern species, Pakenwnclla tenidpes (from 

 the Sooloo Sea), Leander affinis (from Amboina), and Pcnaens 

 velutinus (from the Pacific). As to these three last-mentioned 

 species, there is some reason for separating the Bermuda forms 

 from their eastern allies ; but even if on further study this should 

 prove advisable, it is clear that they are closely related to the 

 species mentioned above. The same interesting relationship is 

 shown in other forms as well, — as in the genus Alpheus we have 

 t\iQA. hippothoc var. bahamensis, which, as I noted in a previous 

 paper, is veiy near the East Indian variety A. cdaincnsis ; and the 

 new species of Nika comes quite near the Amboinian A^. processa. 



With such exceptions, however, the crustacean fauna of Ber- 

 muda is most closely allied to its nearest neighbors, and it is 

 probable that further investigations both in the Bermudas and 

 the West Indies will show a still more complete similarity of the 

 forms. 



Many of the species, as is also the case with those found in 

 the West Indies, have a distribution more or less widely extended 

 in both hemispheres. I have reckoned that i8 out of the 6i 

 are so distributed ; while 33 are, so far as known, confined to the 

 West Indies and the coast of America, between, approximately, 

 the Carolinas and Brazil. Two, Panopcus Jierbstii and Alphats 

 candei, belong to the east and west coasts of America ; and four, 

 Ncptiinus anccps, Calciwiis tibicoi, Alphais hippothoe var. baJiamcn- 

 sis, and AlpJieiis bennudciisis, belong to the West Indies alone, 

 though it is highly probable that further research will discover 

 them on the shores of the mainland. Of all the list, only three 

 are known from Bermuda alone — the two new species described 

 in this paper and Paranebalia longipcs. 



The expedition is entitled to the credit of adding eight species 

 to the crustacean fauna of Bermuda, /. c. Panopeiis herbstii, Ncp- 

 tunus spinimamis, Nika bermiidcnsis, Leander iiatator, AlpJieiis 

 lancirostris, A. Jdppotlioe var. bahamensis, Lepas anatifera and L. 

 pectinata. 



