RECENT AND TERTIARY SPECIES OF LEDA AND NUCULA. 175 
16 in height. Two dead valves, dredged by W. 0. Crosby 
in the Gulf of Paria. 
§ 3. The Miocene Pteropoda of Jamaica. 
In my paper on the Tertiary Molluska of Jamaica, pub- 
lished in the Geological Society's Journal , August 1866, 
p. 281, I quoted a passage from a letter of Mr. Lucas Barrett 
to Dr. Woodward, in which it was stated that a marl-bed 
exists in that island, containing abundance of Pteropoda of 
the genera Cleodora, Creseis and Cuvieria. Up to the 
present time I have heard no more of that discovery, and 
we have not, I believe, any account of the specific forms 
found in Jamaica, except the description given by me of 
Hyalea vendryesiana. In Haiti, Gabb has discovered six 
species of Pteropoda, which he has named as follows : — 
Diacria bisulcata. Planorbella imitans. 
Balantium undulatum. Atlanta rotundata. 
Styliola sulcifera. ,, cordiformis. 
I have received additional specimens of the tertiary fossils 
of Jamaica from Mr. Vendryes, and among them I find two 
apparently new species of Hyalea, which I take the present 
opportunity of describing. 
1. Hyalea vendryesiana , Guppy. 
Geol. Mag. 1874, p. 405, pi. xvii., f. 2 b (not 2 a). 
This species belongs to the section Diacria, whilst the 
following two may be placed among the typical forms of the 
genus. There seems to be an error in my original descrip- 
tion, for it does not appear that in H. vendryesiana the lips 
are everted or thickened. That character belongs to H. 
diyitata, an imperfect example of which is figured with 
H. vendryesiana (fig. 2 a). In H. vendryesiana the lips are 
