GEOGRAPHICAL RANGE. 



169 



Xenobalanus globicipitis* 

 Chthamalus stellatus 

 Pachylasma giganteum* 

 Verruca Stromia . . 

 Spengleri* . 

 Pcecilasma aurantia* 

 crassa* . 

 Dichelaspis Lowei* . 

 Oxynaspis celata* 

 AJepas minuta* . . 



parasita* 

 Anelasma squalicola* 

 Alcippe lampas* . . 

 Scalpellum vulgare* 

 Pollicipes cornucopia* 



confined to Europe. 



Europe and North America and (3 and 4) . 



confined to Europe. 



Europe and lied Sea. 



Madeira. 





Europe. 



Europe and Atlantic Ocean. 



Europe. 





Here we have 31 species, of which 22 are not found in 

 any other great region of the world. 



(2.) Sub-Province : Africa, South of lat. 30°. 



(l to 5). 



Balanus tintinnabulum 

 Capensis* 

 spongicola 

 amphitrite 

 crenatus . 

 Acasta spongites . 

 Tetraclita serrata* 

 rosea . 

 Chthamalus dentatus* 

 Octomeris augulosa* 

 Scalpellum ornatum* 



(1) and West Indies (?). 



(1 to 5). 



(1) and West Indies. 



(1). 



(4). 



also on West Coast of Africa. 



In this small region we have only 11 species, of which 

 five are peculiar : Balanus Capensis and Tetraclita serrata, 

 seem to be representatives of B. psittacus of S. America 

 and of T. porosa of that and several other regions. 



(3.) Second Province: West ^Coast of South and North 

 America, from Tierra del Fuec/o to Behring's Straits. 



Balanus tintinnabulum 

 psittacus* 

 viuaceus* 

 trigonus . 

 lsevis* 

 concavus 

 poecilus* 

 improvisus 



north and south of the equator (1 to 5). 

 south. 



55 



north and south (4 and 5). 



» 



„ (4 and 5). 



south, 

 south (and north ?)(!). 



