10 



BULLETIN 93, UNITED STATES NATIONAL MUSEUM. 



In addition to material tabulated above, I have had available for 

 study several species contained in the collection of the Academy of 

 Natural Sciences of Philadelphia, including the types of five species 

 and four subspecies, and from the Museum of Comparative Zoology 

 the types of two subspecies. So far as I know, this includes all but 

 one of the types of recent sessile cirripedes contained in or described 

 from American museums. 1 



The British Museum, containing the types of Darwin's monograph 

 and of Hoek's Challenger report, etc., possesses more types of sessile 

 cirripedes than any other museum, at least 34 per cent of the total 

 number of accepted species. The United States National Museum 

 stands next, having types of about 21 per cent of the valid species 

 and about 43 per cent of the subspecies. Other museums contain 

 comparatively few types. Many types of the older (pre-Darwinian) 

 species are lost, or at least the present location of the type-specimens 

 is not known. The calculations above do not include types of forms 

 generally admitted to be synonyms. 



DISTRIBUTION OF AMERICAN BALANOMORPH BARNACLES. 



The distribution of Verrucidee has been considered separately (p. 18). 

 In the following list the species are arranged systematically, the geo- 

 graphic ranges of Atlantic species being printed in roman, of Pacific 

 species in italic type. 



Species. 



American distribution. 



Occurrence elsewhere. 



Balanus tintinnabulum antil- 

 lensis. 



t. californicus 



t. peninsularis 



t. coccopoma 



t. galapaganus 



t. concinnus 



psittacus 



eburneus 



improyisus 



amphilrile iiireus 



a. t nerpectatus 



pemvianus 



concavus pacificus... 



regalia 



pocci/us 



trigonus 



Cuba to Brazil. 



Santa Barbara to San Diego, Cal 



Cape St. Lucas, Lower California 



Muzatlan to Panama 



Galapagos Islands 



Peru to Strait of Magellan 



Peru to Strait of Magellan 



Massachusetts Bay to Caribbean Sea 



Nova Scotia to Patagonia; ? West Colombia 



Vineyard Sound to southern Brazil 



Gulf of California 



Peru. 



spongicola. 



California to Peru 



West coast of Lower California 



West coast of South A merica 



West Indies to southern Brazil; sou/hern 



California to Peru. 

 Venezuela to Brazil . . 



calidus 



Isetis 



aquila 



nubilis 



flos 



rostratus alaskensis . . 



r. apertus 



r. dalii 



r. heteropus 



balanus 



6. pugetensis 



crenatus 



c. curvisnttum. 



c. delicatus 



glandula 



We*t Florida to Yucatan and St. Vincent. 



Rio Negro to Cape Horn, north to Peru 



Monterey to San Diego, Cal 



Southern Alaska to Santa Cruz, Cal 



California 



A laska 



Bering Sea 



Bering Sea 



Puget Sound 



Arctic Ocean to Long Island; Bering Sea. . . 



Puget Sound 



Arctic Ocean to Long Island; Bering Sea to 

 Santa Barbara, Cal. 



A laska 



California 



A leutian Islands to San Diego 



Europe; Red Sea. 



West and South Africa; 



Japan to Australia. 

 English Channel to South 



Africa; Seychelles. 



Northern Europe. 



Europe, Mediterranean; 

 northern Japan. 



The type of Euraphia hembcti Conrad appears to be lost. 



