134 Sctentific Intelligence. 
more particularly true as regards the ar he of mollusca, and es- 
pecially the tribe of air-breathing or land mollus 
A few only of the larger species of this tribe eas their way at an 
early date into European cabinets, and were described and figured by 
the conchological writers of the last century. Ata later period, through 
French cabinets were enriched with many species from Hayti, Martin- 
ique and Gaudaloupe, which adorn the great monograph commenced by 
Baron Ferussac. The Rev. Lansdowne aig an accomplished 
English naturalist, resident for many years upon the island of St. 
added something to our knowledge of the land conchology of their 
Vicinities, 
The monograph of the genera Helicina and Cyclostoma in Sowerby’s 
Thesaurus Conchyliorum, contained many new West India species, 
The first volume of the * Mellicagune’ was published | in Paris in 1841, 
and is yet little known in this countr 
ch are the sources of our knowledge of the West India land shells, 
aside from that supplied by Prof. Adams’s labors in Jamaica. A visit to 
that island in the winter of 1843-4, enabled him to ascertain just enough 
of its zoological and especially its conchological riches, to excite a de- 
sire in lovers of science that this field might be more thoroughly ex- 
plored. A hasty examination of but a small portion of mee island on 
that occasion, enriched our catalogues with about 120:n w species, 
which about 70 were marine, and 50 were land-shells. 
n the winter of 1848-9, Prof. Adams made a second visit to this 
named at the head of this article. We see with surprise how rich @ 
field has been lying neglected almost at our doors. The * Contribu- 
tions to Conchology” contain descriptions of 137 supposed new species 
of land and fresh-water shells; and these added:to those found in the 
first visit, make a total o 187 s species contributed to science by Prof. 
ms. The extent of this a will be appreciated, when 
it is observed that the whole number of land and fresh-water species 
yet known to inhabit the island is only 286. 
The operculated species constitute a large share of this increase ; of 
101 species from Jamaica, 66 were discovered by Prof. Adams. Among 
