VIII. 



ZOOLOGY OF THE BERMUDAS (continued). 



CRUSTACEA. 



For the following notes on the Crustacea I am principally 

 indebted to Mr. Witmer Stone, one of my assistants on the 

 trip, who has made a careful study of all the specimens, as well 

 as of the allied and identical species contained in the collections 

 of the Academy of Natural Sciences. In the case of in any 

 way doubtful forms I have personally satisfied myself as to 

 the determinations, particularly in cases where the geo- 

 graphical range appeared to indicate possible or probable 

 error. The occurrence in the Bermudas of a number of what 

 had hitherto been considered to be distinctively Pacific or Old 

 World types, as for example, Palemonella tcnuipes (Sooloo Sea), 

 Palemon affinis (Pacific), Penssus velutinus (Pacific) may be 

 considered positive, even though it be opposed to the common 

 facts of zoogeography. But this anomaly in distribution is 

 again repeated among the Mollusca, as will be seen in the 

 enumeration of species further on. 



The total number of species here enumerated is not very 

 large, but yet it is considerably in excess of the number 

 published in any previous paper, probably one-half of the 

 species being now for the first time credited to the Bermudas. 

 The species of some of the remaining groups the Isopoda, 

 Amphipoda still await analysis and determination. 



BRACHYURA. 



Microphrys bicornutus, Latr. 



