—— = 
Review of Reeent Geolo gical Literature. 253. 
reference. Working paleontologists of all countries must be under 
lasting obligations to Messrs. Whitfield and Hovey for their pains- 
taking efforts, 
The most notable itection of fossils which the Museum possesses 
is the famous series that was acquired through a long period of years 
by the late James Hall. “The principal feature of that collection is 
the large number of type and other illustrated specimens, especially of 
Paleozoic species, which it contains, This Hall collection may well be 
considered the standard reference collection for all workers in North 
American Paleozoic paleontology; hence the desirability, in the opin- 
ion of the senior author of this catalogue, who himself has been iden- 
tified with the collection for more than forty-five years, of publishing 
a complete record of these valuable specimens. Other collections have 
been added to the department from time to time through exchange and 
other means, but with few exceptions they contain no types. Most of 
the ‘figured specimens’ in the series are those which were identified, 
redescribed, illustrated and published by professor Hall in the early 
volumes of the Paleontology of New York, and therefore have almost 
the dignity and value of types.” 
Reference may be made to the February number of the Geotocist for a 
tabular statement of the numerical summaries of type and figured 
specimens here catalogued, and for a definition of the term type as here 
employed. — Cre ee 
Notes on the Raised Coral reefs in the Islands of the Riukiu curve. S. 
Yosutwara, (Jour. Coll. Sci., Imp. Univ. Tokyo, vol. 16, part 1. 
pp. 14, 2 plates, 1901.) 
Geologic structure of the Riukiu (Loochoo) Curve, and tts relation 
jo the northern part of Formosa. S. YosHiwaRa. (Jour. Coll. 
ci., Imp. Univ., Tokyo, vol. 16, pp. 67, plates and maps. 1901.) 
The Riukiu Curve, is commonly called, on European and American 
maps, the Loochoo group of islands, extending northeastward from 
Formosa. Since the acquirement of Taiwan (Formosa) by Japan, the 
Japanese have taken measures to survey and examine that island and 
the dependent islands intervening and surrounding. 
The raised reefs are more ancient than the recent reefs. They are 
homogeneous in structure and consist of a true coral formation, with 
interstratified sandy layers rarely inclosed. The latter are found to- 
ward the north. The raised reefs are found from ten to 684 feet above 
the sea. The foundation of these reefs consists of Tertiary and 
Paleozoic sediments, as well as igneous rocks. They are mostly later 
than the Tertiary and are horizontal, in contrast with the inclined beds 
on which they lie. They evidently have been raised from the rocky 
sea-bottom, or fringed the margins of islands. They are distinguished 
from the recent reefs by their position, structure and color, often 
forming terraces, while the recent reefs are seen fringing the shores 
id ai low tide, there being neither atolls nor barrier reefs amongst 
theni. 
