+ 
322 Lamarck’s Genera of Shells. 
One species. Castalia ambigua*. 
Shell oval, triangular, tumid; anteriorly obtuse, cordate, 
longitudinally ribbed ; ribs rather flat, transversely striated, 
and not extending to the superior margin, Epidermis brown ; 
margin entire ; internally brilliant-pearly. New Holland. 
Errata in first part of this Paper. 
Page 79, line 2, for open and shut them, read to open them when shut. , 
84, ,, 24, for Myaria. (3 Genera,) read Myaria. (2 Genera.) 
[To be continued.] 
” 
Arr. VI. Extracts from the Meteorological Journal of 
Signor Marto GemmMeEtiaro, of Catonia, in Sicily. 
[We have been favoured by a Correspondent with the original journal of 
Signor Gemmellaro, from which we have made the following extracts. ] 
In the year 1804, a sensible earthquake occurred on the 9th 
February, Etna emitted smoke ninety-seven days, but no erup- 
tion took place. The lowest degree of temperature at Catania 
was 47°, the highest 90°. No thunder. 
In 1805, an earthquake occurred on the 3d July. The moun- 
tain emitted smoke 47 days, flamed 28 days, and an eruption 
took place in June, within the great crater. No thunder. Lowest 
temperature 48°, highest 90°. 
In 1806, two earthquakes, viz., on the 27th May and 10th 
October. The mountain smoked 47 days, flamed 7 days, and 
detonated 28 days. A little thunder. Lowest temperature 44°, 
highest 90°. 
In 1807, two earthquakes, viz., on the 24th February and 
25th November. Etna smoked 59 days. Very little thunder. 
Lowest temperature 44°, highest 93°. 
In 1808, many sensible earthquakes on various days of 
August and September, and in all December, and the mountain 
detonated at the same times. It emitted smoke only 12 days, 
but flamed 102 days. Several thunder storms. Four destruc- 
tive waterspouts at Nicolosi and at St. Nicolol’Arena. Lowest 
temperature 30°, highest 95°. 
» Doubtful. An unique shell, in the possession of M. le Marquis de Dree. 
We do not know that any figure of it is published ; if we can obtain it, we 
shall give it in a future number. 
