28 THE VOYAGE OF H.M.S. CHALLENGER. 



In the South Indian Ocean: — 



Scalpellum tenue, n. sp. 



brevecarinatum, n. sp. 

 Jiavum, n. sp. 

 antarcticum, n. sp. 

 planum, n. sp. 



In the Pacific : — 



Scalpellum abyssicola, n. sp. 

 gigas, n. sp. 

 darivinii, n. sp. 

 minutum, n. sp. 



With regard to the geographical distribution of the Cirripedia, the four provinces 

 into which Darwin divided the globe must be increased, I think, by two or three 

 others. A new province must be added for the Cirripedia of the southern part of the 

 Indian Ocean, and another for the species of Japan and of the North Pacific. The number 

 of species known as inhabitants of these provinces is not yet very large, but — with a few 

 exceptions only — these species are characteristic of the different regions, at least as 

 far as our knowledge goes. I feel inclined, moreover, to divide the great Atlantic 

 province into a northern and southern half, and as I cannot very well understand the 

 difference in meaning between a province and a sub-province, I propose to consider 

 the sub-province formed by Darwin for the southern extremity of Africa as a province 

 also. So we should have the following eight provinces : — 



I. — First or North Atlantic Province : the North Atlantic Ocean, from the Arctic 

 regions to about latitude 10° N. This province embraces the coasts of Europe 

 and North Africa, and of the eastern United States, besides the Mediterranean and 

 the West Indies. 



Dichelaspis lowei, Darwin. Madeira. 



darwinii, De Filippi. Mediterranean. 



sessilis, n. sp. Atlantic. 



Pcecilasma aurantium, Darwin. Madeira, 



crassum, Gray, sp. Madeira. 



carinatum, n. sp. West Indies and (III.). 



Alepas minuta, Philippi. Mediterranean. 



parasita, Sander Eang. Mediterranean, Atlantic. 



