232 Miscellaneous Intelligence. 
‘The islands north of ew form two parallel chains, from northwest to 
southeast. The western chain commences with Saba, and consists of St. Hus- 
tatius, St. Kitis, Nevis, Redonda, a Montserrat. All of those islands are volca- 
nos; and, if the line were extended farther to the north, it would reach the 
island - Anegada, of oes me date, i sr the vo rarer seem to be of the 
same or nearly the same geological “st aeage ere Islan iso most 
pro nian. of Post-pliocene date g ve e direction, He seem to be the con- 
tinuation of the same or of a aon ij line of el ‘elevation. ong of the volcanic range 
is another completely different Tange 0. of islan They are not volcanic, and 
commence with Sombrero, comprising Angu ita, St. Martin, ‘St Bartholomew, Bar- 
ee and i hl All of these ikea a are of the Te rtiary age, Eocene, “Mache, 
a his ‘ Summary of the Geology of the West Indies’ (2. ¢. 47) 
Dr, Cleve says: 
m the facts exposed above, it may consequently be inferred that, Be the 
two prevailing lines of elevation in the West Indies, the one running from est to 
east originated be: i e oti 
an 
southeast, commencing with the Bahamas and co i in the same direction 
down to Trinidad, was formed in the Miocene tim 
“While considering the facts 38 geo joc grouping . the 
islands quoted above from Dr. Cleve’s paper, it should be remem- 
bered that the land-shell fauna of Saba 24 St. Eustatius, St. ‘Kitts, 
and Nevis (all three on one bank), and of Redonda and Montser- 
? 
“This difference of the faunas, pn the i dete’ a of their 
separation, must be considered in connection with the past and 
a geological history of the islands. 
“The distribution of the species of the genera Macroceramus 
and Strophia illustrates in a marked _— the distinctness of 
the two faunas just mentioned. acroceramus has two species in 
the greeny: (one rhea to the Great Bank, reckon and Cuba, 
= apie has 16-18 species in the —_——- of which 1 is also 
in the Florida Keys, and at least 6 in Cuba; 17 in Cuba, —_* 
© Seb Rand Pree. Amer. Phil. Soe., 1. ¢. 
