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FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



are known from only a few localities and from 

 relatively few specimens in both the Gulf and 

 adjacent areas. 



Many tropical species of littoral barnacles are 

 represented in the Gulf. Some of these species, 

 B. calidus, B. dedivis, B. stultiis, and C. s. an- 

 gustitergum, are limited to the West Indies fauna; 



B. galeatus and T. s. stalactifera occur also in the 

 eastern tropical Pacific; and the other species, 



C. patula and P. hexastylos, are widespread in 

 tropical waters. The last two species, B. galeatus, 

 which has also been found on the Atlantic coast 

 as far north as North Carolina, and B. calidus 

 have a wide range in the Gulf, whereas, the other 

 species are limited to the Florida Keys. 



The rest of the common littoral barnacles of 

 the Gulf are important components of the littoral 

 fauna of the Atlantic coast where the northern 

 limit varies from Massachusetts {B. a. niveus and 

 B. ehurneus) to New Jersey {C. fragilis and C. 

 testudinaria) and the southern limit from the 

 Caribbean coast of South America {B. ehurneus 

 and C. fragilis) to southern Brazil {B. a. niveus 

 and C. testudinaria). With the exception of B. 

 ehurneus these species occur in one or more other 

 faunal provinces. 



The littoral fauna of the Gulf, therefore, con- 

 sists of a mixture of warm temperate and tropical 

 species. One ubiquitous species, B. improvisus, 

 also occurs in the Gulf; the western Atlantic range 

 of this species is from Nova Scotia to southern 

 Patagonia. All of the common littoral barnacles 

 of the temperate waters of the Atlantic coast and 

 none of the common boreal species (B. balanoides, 



B. crenatus, B. halanus, and B. hameri) occur in 

 the Gulf, but many of the tropical species found 

 in the West Indies have not been reported from 

 the Gulf. 



BIBLIOGRAPHY 



Humes, A. G. 



1941. Notes on Octolasmis mulleri (Coker), a barnacle 

 commensal on crabs. Trans. Am. Microsc. See. 60: 

 101-103. 

 KoLosovARy, G. v. 



1943. Clrripedia Thoracica in der Sammlung des 

 ungarischen National- Museums. Ann. Hist. Nat. 

 Hungarici 36: 67-120, 2 pis. 

 Nilsson-Cantell, C. A. 



1929. Two species of Balanus very little known since 

 the Darwinian monograph of Cirripedia was issued. 

 Ark. Zool. Stockholm 20A, no. 14: 1-7, 3 text figs. 

 Pearse, a. S. 



1932a. VI. Observations on the parasites and com- 

 mensals found associated with crustaceans and fishes 

 at Dry Tortugas, Florida. Pap. Tortugas Lab. 

 Carnegie Inst. Washington (Pub. 435) 28: 103-115. 



1932b. VII. Inhabitants of certain sponges at Dry 

 Tortugas. Pap. Tortugas Lab. Carnegie Inst. Wash- 

 ington (Pub. 435) 28: 117-124, 2 pis., 1 text fig. 



PiLSBRT, H. A. 



1907. The barnacles (Cirripedia) contained in the col- 

 lections of the U. S. National Museum. Bull. U. S. 

 Nat. Mus. 60: 122 pp., 11 pis., 36 text figs. 



1916. The sessile barnacles (Cirripedia) contained in 

 the collections of the U. S. National Museum, includ- 

 ing a monograph of the American species. Bull. 

 U. S. Nat. Mus. 93: 366 pp., 76 pis., 99 text figs. 



1931. The cirriped genus Pyrgoma in American waters. 

 Proc. Acad. Nat. Sci. Philadelphia 83: 81-83, 1 text fig. 

 Stephenson, T. A., and A. 



1950. Life between tide-marks in North America. I. 

 The Florida Keys. Jour. Ecol. 38 (2) : 354-402, pis. 

 9-15, 10 text figs. 



