1(58 
gfoloVit of rtlKA, 
I>o they prove a submarine communication between the 
ri''*”' the fresh water of Cuba 
‘iised up by hydrostatic pressure across the coral rocks of 
' of the sea f the bay of Xagua, where, in the middle 
sp by the lamantins P 
, manner by syenitie and euphotide 
rocks iinited m groups. The southern bottom of tL baV 
Se clLfhil Morro aifd 
the Cabana) are of Jura limestone ; but on the eastern bank 
of the two Ensenadas de Eegla and Guanabacoa, the whole 
npn* Tvf to south, and first 
ear Manmelena we find syenite consisting of a great 
quantity ot hornblende, partly decomposed, a little qiuirtz 
crystallized. tL fine 
SI enite the strata ot which incline to the north-west alter- 
mates twice with serpentine. The layers of intercalated 
serpentine are three toises thick. Farther south, towards 
Eegla and Guanabacoa, the syenite disappears and the 
whole soil IS covCTed with serpentine, rising in hills from 
5 SCkT;,',r? S'.";'* 
ibis lock IS much feiidillated, externally of a bluish- grov 
leT’^iras manganese, and internall| of 
fliall^L d- garnet or amphibole, but metalloid 
diallage disseminated in the mass. The serpentine is some- 
times of an esquillous, sometimes of a concLidal fracture: 
IS nas the first tune I had found metalloid diallage within 
Sp 1^- ^l^l''* serpentine have magnet^ 
s^ic^n if Imniogeneous texture, and hare / 
such a glossiness, that at a distance they may be taken for 
nrts of^Ceri^ri' *l'®.’^'“’e in several, 
paits of Germany. In approaching Guanabacoa we find 
serpentnie crossed by veins between twelve and’ fourteen 
niches thick and filled with fibrous quartz, amethyst and 
^ibL“thTc ''“‘l*l'‘l‘''oforme chalcedonies; it is pos- 
mble that clirysoprase may also one day be found. Some 
wpper pyntes appear among these veins, accompanied, it 
IS s.nd, by Bilveiy-grey copper. 1 found no traces ot this 
