CIRRIPEDIA 



BY 



P. P. C. HOEK 



INTRODUCTION 



The collection of Cirripedia made during the cruise of the S. Y. Belgica contains three 

 species : one species of the genus Balanus, one of Elminius and one of Vernica. The Balanus- 

 and Elminius-species were collected, during shore exploration, in the Magellan countries ; the 

 Vermca-species was taken with tangles (fauberts) at a depth of over 5oo meters at about 

 70 lat. S. Whereas the first two are well known forms belonging to the South-American coastal 

 fauna, the third is a true antarctic deep-sea species which has never been described before. 



The coastal waters of subantarctic South-America do not seem to be very rich in 

 species of Cirripedia. When describing the Cirripedia of the Hamburg Magellanic Collecting 

 Voyage ('), Weltner (in 1898) enumerated 17 species ( 2 ) as belonging to the subantarctic Fauna 

 of South-America, but of thèse 9 only belong to the coastal fauna of that région, viz. 1 species 

 of Elminius (E. Kingi, J. E. Gray), 5 species of Balanus (B. floscidus Darwin, var. sordidus 

 Darwin, B. improvisas Darwin, B. laevis Bruguière, B.psittacus (Molina) and B. tintinnabulum (L.), 

 var. communis Darwin), 2 of Chthamalus (C. cirratus Darwin and C. scabrosus Darwin) and 1 

 Verruca (V. laevigata G. B. Sowerby) ; the other species are deep-sea species or hâve as true 

 pelagic animais a world-wide distribution. 



Nor is the number of known antarctic species of Cirripedia large, the only species so far 

 as I know being the Scalpellum collected near the South Polar Circle, during the cruise of the 

 English man of war Challenger, for which I proposed the name Scalpellum antarcticum ( 3 ). 



(1) Hamburger Magalhaenische Sammelreise. Cirripedien, bearbeitet von Dr. W. Weltner. Hamburg, 

 L. Friedrichsen & C°, 1898. 



(2) Moreover one parasitical form (Peltogaster) and one of Darwin's Abdominalia (Cryptophialus). 



(3) Report on the scientifîc results of the voyage of H. M. S. Challenger. Zoology, Vol. VIII, Part. XXV. 

 Report on the Cirripedia, i883. 



45985 



