404 Prof. V. Ball— Volcanoes in Bay of Bengal. 
BovuLocne. 
The Museum of Boulogne is presided over by Dr. H. EH. Sauvage, 
the Director of the Station Aquicole, and is especially rich in 
historical antiquities, mainly discovered in the immediate neighbour- 
hood. <A typical collection, however, represents local geology and 
paleontology, and the vertebrate fossils have been described in 
some of the well-known works of the Director. A Portlandian 
Rhinobatus (Spathobatis) seems to be scarcely distinguishable from 
the great Rhinobatus mirabilis of the Solenhofen Lithographic Stone ; 
and the Kimmeridgian fossils are very like those of England. 
In concluding these brief notes, the writer would once more 
express his warmest thanks to all whose cordial receptions every- 
where added to the enjoyment of the tour. In the Scientific World 
there is certainly no nationality; and a practical interest in any 
particular branch of study is an amply sufficient passport to all 
scenes of scientific activity, wherever they may be. 
TV.—Tue Voucanoes or Barren Isuanp AND NARCONDAM IN THE 
Bay or BENGAL. 
By Prof. V. Batt, M.A., F.B.S., F.G.S., 
Director of the Science and Art Museum, Dublin. 
Second Notice. 
BOUT nine years ago I contributed to the pages of this 
MaGazine,! an Ae eoumnt of the two above-named volcanoes, 
which was founded on observations made during brief visits by 
myself in the year 1873, and on the published records of visits by 
previous observers. My present object is to draw attention to 
information which has since then been acquired regarding them. 
Barren Istanp, Lat. 12° 15’, Long. 98° 50’. 
As Barren Island affords a typical example of a volcano having an 
encircling outer crater with an inner cone, it has attracted the notice 
of many authors who have written either on general geology or on 
special volcanic phenomena, and it has often been described by 
them; but, as I pointed out, their descriptions have, unfortunately, 
interwoven with the facts a certain amount of myth, the origin of 
which I was, however, enabled to indicate. It was due to the mis- 
conception by Von Buch of the meaning of the English description 
by Blair, from which he quoted, that he gave currency to the state- 
ment that the sea had access to the interior of the old crater and 
surrounded the inner cone. For this statement there is not a 
shadow of historical evidence, the records so far as they go prove 
the contrary. At the same time it very possibly may have been the 
case at a prehistoric period in the life of the volcano. 
In the year 1884, what may be described as the first exhaustive 
geological and topographical survey of these two volcanic islands 
was made by Mr. F. R. Mallet and Captain Hobday, who spent nine 
1 Gronocrcat Macazing, Vol. VI. 1879, pp. 16-27. 
