CIRRIPEDIA 



195 



the island groups makes this feasible. In addition, Springer 

 (1982) suggests that the Caroline Islands may act as a con- 

 duit onto the Pacific Plate from the western Pacific. The 

 species most likely to occur at Enewetak Atoll are the bar- 

 nacle commensals of wide-ranging nectonic organisms such 

 as marine mammals and reptiles. These commensals 

 include Conchoderma auritum (Linnaeus, 1767), Concho- 

 derma virgatum (Spengler, 1790), Lepas hilH (Leach, 

 1818), Chelonibia caretta (Spengler, 1790), Coronula 

 diadema (Linnaeus, 1767), and Plafylepas hexasfylos 

 (Fabricius, 1798). Another group, which is undoubtedly 

 better represented at Enewetak Atoll than records indicate, 

 includes the coral-inhabiting species in the balanid subfam- 

 ily Pyrgomatinae. 



Our knowledge of barnacles from Enewetak Atoll can 

 be summarized as incomplete taxonomically. However, 

 zoogeographically Enewetak Atoll is representative of the 

 Indo-West Pacific faunal region with a close relationship to 

 the western Pacific. A small but obvious component of the 

 fauna is the cosmopxjlitan fouling community, which 

 includes many of the familiar thoracic barnacles that are 

 often so abundant in shallow water. The majority of 

 species, however, display a more restricted distribution. 



ACKNOWLEDGMENTS 



1 would like to thank William E. Newman for critically 

 reading the manuscript and for his many valuable com- 

 ments and suggestions. He was especially helpful in sug- 

 gesting species that are likely to occur at Enewetak Atoll. I 

 would also like to thank John S. Garth, A. J. Bruce, and 

 Janet Haig for providing information on the possible pres- 

 ence or absence of rhizoccphalans on Enewetak decapods. 



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