NOTE ON GLAUCONOME DISTICHA. 99 
by Touta upon a fragment of a Polyzoan brought from the 
Arctic regions. The reference mainly rested on a certain 
outward resemblance, not very reliable or marked, for while 
the Bala species has only two rows of cells on the branch, 
Ramipora has five or six. 
The type species from the Dudley Limestone. is thus described 
by LonspaLE—“‘ Stem strong, thin, elongated, oval, branched, 
cells disposed longitudinally, and alternately, in rows over 
one half of the surface, the other half striated longitudinally. 
Nature of the covering and opening of the cells unknown.” 
I may supplement the above by stating that, after careful 
examination, I find the cell open and exposed throughout its 
entire length; this is not accidental, but characteristic. The 
cells are built up of a series of thick longitudinal walls running 
parallel with the branch, and divided at regular intervals by 
cross walls, which go to form the cell, or rather cell area, which 
is depressed in the centre, and may be pyriform or quadrangular 
in shape The keel is normally rounded, having on the 
elevated portions prominent nodes. 
The most remarkable feature about the cell is its open 
character, for out of the many examples I have examined 
I have not found one otherwise. That this is not due to the 
wearing away of any part of the structure is apparent from the 
fact, that even more delicate Polyzoans associated with it are 
not affected. LoNSDALE noticed the same peculiarity; for he 
says that ‘‘ the nature of the covering and opening of the cells 
is unknown.” This is still the extent of our knowledge. 
We turn now to the Glauconome from the Bala beds, and at 
once we notice the structural contrast. Here we have a long 
tapering cylindrical zocecia, buried in the substance of the 
branch, as against an open quadrate cell. Any relationship 
between two species of Polyzoa, with this diverse character, is 
out of the question. The difference is even more than generic. 
They cannot be classed in the same sub-order, for while the 
cylindrical form of cell and its arrangement in the Bala species 
indicate its Cyclostomatous character, the zoarial features in 
the Dudley species point to a more primitive arrangement of 
the cell, unlike anything seen in recent types of Polyzoa. It 
cannot belong to the Cyclostomata, or to any of the existing 
sub-orders, which have been constructed for the reception of 
recent types. For the reception of it and similar Palzozoic 
species, Mr. VINE proposes a new sub-order—Cryptostomata. 
The effect of this discovery of the diversity between these 
species will be, so far as the nomenclature is concerned, as 
follows ; — 
1. That the type species of Glauconome disticha from the 
Wenlock limestone will be (so far as known at 
present) the sole representative of the genus ; 
