B. CIRRIPEDIA SESSILIA 



: 



Genus VeiTUCa Schumacher 



Of this genus Gruvel, in 1905, knew 25 species, a very considerable number when we 

 consider that, in 1883, before my Report on the Challenger Cirripedia was published, only 

 four species were known. 



The deep-sea exploration, however, added largely to that number : 



6 nevv species were collected by the "Challenger" (Hoek 1 ), 



7 nevv species were collected during the cruises of the "Hirondelle" and "Alice" (Aurivillius 2 ), 

 and 8 new species were collected by the "Travailleur" and the "Talisman" (Gruvel 3 ). 



The richness in species of this deep-sea genus seems by no means exhausted ; according 

 to the results of the dredgings published of late : 



4 new species were collected by the "Investigator" (Gruvel 4 ), 

 1 new species was collected by the "Belgica" (Hoek 5 ), 



5 new species were collected by the "Albatross" (Pilsbry 8 ) 



and 6 new species were collected by H. M. "Siboga" (Hoek) which will be described in this Report. 



This augmentation lias been especially important for the sixth province (Indian Archi- 

 pelago and Eastern coasts of India), as proposed by me (1. c. p. 33) for the geographical distri- 

 bution of the Cirripedia. Only one species of Verruca {Verruca nitida, collected by the "Chal- 

 lenger" to the South of Mindanao) was known from that region in 1883 and this number has been 

 increased to eleven by the 4 species collected by the "Investigator" and 6 by the "Siboga". 



All these species were taken from deep water, as can best be seen from the following 

 table, in which they have been placed according to the depth at which they were found : 



Verruca multicostata Gruvel, Strait Malacca, 160 m. 

 Verruca plana Gruvel, Andaman Islands, 380 — 465 m. 

 Verruca Koehleri Gruvel, Andaman Islands, 435 m. 



1 Hoek, P. V. C, Cirripedia of the Challenger Expedition. 1883. 



- AURIVILLIUS, Carl W. S., Cirrhipèdes nouveaux provenant des campagnes scientifiques de S. A. S. Ie Prince de Monaco. 

 Buil. Soc. Zool. de France, XXIII. 1S9S. p. 1S0— 19S. 



3 Gruvel, A., Cirrhipèdes des Expéditions scientifiques du "Travailleur"' et du "Talisman". 1902. 



4 Gruvel, A., Cirrhipèdes operculés de 1' Indian Museum de Cakutta. Mém. Asiatic Soc. Bengal, II. 1907. p. I — 10, pi. I — II. 



5 Hoek, P. P. C, Cirripedia. Résult. Voyage Belgica. Zool. 1907. p. 1 — 9. 4 fig. 



Pilsbry, H. A., The Barnacles in the U. S. National Museum. Bulletin 60 of U. S. National Museum. 1907. 



I 

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