126 
INTERCELLULAR RELATIONS OF PROTOPLASTS. 
It will be seen, therefore, that in all cases the nucleus has 
disappeared from the mature sieve tube, the protoplasm lias 
diminished to a parietal layer ol small thickness, while in 
Cryptogams, Gymnosperms, and some Monocotyledons there 
has been a variable development of highly refractive globules 
of albuminous nature, and in Dicotyledons and other 
Monocotyledons there has been a similar variable development 
of an albuminous or proteid mucous or gelatinous substance. 
Is the mucous of Dicotyledons equivalent to the jelly of 
Monocotyledons ? Have they any genetic relationship with 
the albuminous refractive globules of the Cryptogams and 
Gymnosperms ? 
(To be continued.) 
THE BASALT OF ROWLEY REGIS. 
II.—THE ROCHE AND CLAY-MARL. 
BY C. BEALE, C.E. 
(Continued from page 112.) 
The roclie is a peculiar development of the basalt, and it 
is the facts in connection with this material which we have 
now to review, I have just said it is a mass of dry rocky 
material, which breaks up into small cubical morsels in the 
hand without any difficulty ; that is, doubtless, one great 
feature in the roclie, but it is only one feature. 
The roclie is of various depths, but, perhaps, if we give it 
an average of twenty or twenty-five feet we shall not be 
overstating the fact. It occurs in various forms. We find 
it in one place in thin vertical bands of from three to fifteen 
inches in thickness; these bands are not solid throughout, 
but consist of a number of plates about an eighth to one 
quarter-of-an-incli in thickness ; removing these we find they 
crumble as already described. 
These vertical bands occur as partings between a different 
development of the roclie, consisting of spheroidal masses 
formed of concentric layers of the same thickness, generally, 
as the vertical plates, each mass having for a nucleus a 
compact fine-grained spherical mass of true basalt, but of a 
somewhat darker colour than the stone below, and very much 
harder. These spheroidal masses are roughly arranged in 
columnar fashion, and are of various dimensions, not only as 
