AMERICAN NATURALIST 



Vol. XLII May, 1908 No. 497 



GEOGRAPHICAL DISTRIBUTION; ORIGIN OF 

 THE BERMUDIAN DECAPOD FAUNA 

 PROFESSOR A. E. VERRILL 

 Yale University 



In a report now in course of publication 1 on this group, 

 78 species, subspecies or named varieties are discussed, 

 of which 16 have not been previously recorded from 

 Bermuda. Among these, six are described as new. 



Of the total number, 72, equal to 93 per cent., have been 

 recorded also from the Florida Keys or the West Indies, 

 or from both, demonstrating the close faunal relations of 

 the two regions. The macruran Decapoda (35 species) 

 show similar relations. 



About 53 of the forms (about 68 per cent.) range from 

 Florida to Pernambueo, Brazil, or farther south. 



A considerable number, about 25 species, or 31 per 

 cent., extend their range north of Florida to the coast of 

 South Carolina or farther north, the greater portion of 

 these reaching Cape Hatteras. Six or seven reach south- 

 ern New Jersey. 



Two species, Callinectes sapidus, Eupanopeus Herbstii 

 and its var. obesus, range northward to southern New 

 England, as permanent residents. 



Several others occur occasionally or sporadically on 

 this coast, being carried northward by the Gulf Stream, 

 or by shipping, but fail to become naturalized so far 

 north, owing to the cold of winter. 



'Trans. Conn. Academy of Sciences, Vol. XIII, pp. 299-173, plates 



