SCALID^ OF THE WEST INDIA ISLANDS. 191 



Scala wrohlewski/i, Morch [ScaUria boreaUs, Gould, now Beck), Scnla ochotensis, 

 Midd , which may he considered a gigantic Scala boreaUs, Beck. 



In the south polar region Scala wrohlewskyi is represented by Scala australis, 

 Lam., which resembles it so closely that Dr. Gould considered it identical, and for 

 this reason retired his species. Scala horealis, Beck, is represented by Scala graji- 

 osa, Q. and G., which was considered a Turritella on account of the want of ribs. 



On the American Atlantic coast line, from Cape Cod to South Carolina, six 

 species are indicated. In the tropical region, the Gulf of Mexico with its islands, 

 the north coast of South America, which however is little known, are found forty 

 species, of which only one is not found on the islands. 



From Bio Janeiro to the Strait of Magellan only six species are again indicated. 



On the American Pacific coast line, from Vancouver's Island to Upper Califor- 

 nia, Dr. Carpenter has enumerated about eleven species. In the tropical region 

 from California to Peru twenty-six species. On the south coast of South America 

 influenced by the polar stream no species is indicated except Scala magellanica, 

 Phil, from the Straits of Magellan. 



On the European side of the Atlantic Ocean, on the coast of Norway and 

 Eno-land, are indicated four species, all of which are found also in the Mediterra- 

 nean; in this sea and in the adjacent parts of the Atlantic from Portugal to 

 Madeira, are found twenty-three species, of which a few only are found at Madeira. 



From the tropical west coast of Africa about six species are indicated ; at Cape 

 of Good Hope about five species, among which is Scalaria australis, Lam. 



On the Asiatic side of the Pacific Ocean, from Japan and China, are indicated 

 about thirty-three species ; from the Philippine Islands thirty five species, nearly 

 all collected by the late Mr. Cuming. 



From the Bed Sea and India about twenty-five species ; from New Guinea and 

 the other Pacific islands about twenty species ; and from New Holland and New 

 Zealand about fourteen species are known. 



The number of living species is probably about 240, which generally have a 

 limited distribution, although several species by some authors are considered iden- 

 tical on both sides of the Atlantic Ocean and between India and the West Indies. 



The West Indian fauna, containing forty species, is the richest in Scalidse, but 

 I suppose that the Philippines, when better investigated, will prove still richer. 



D'Orbigny in his excellent "Mollusques de Cuba," published 1842,* indicates 

 seven species, of which five are new. 



* The two volumes have the year 1853. Vol. I. is, according to Troschel's " Jahresbericht," published in 

 1841, except the two last sheets which are from 1842 ; of Vol. II. the first seven sheets were published 1842. 



