436 Prof. H. A. Nicholson—On Syringolites, Roemeria, ete. 
to be primarily twelve, as is the case in Heliolites, Halysites, 
Syringopora, ete. 
Upon the whole, therefore, it cannot be doubted that Syringolites, 
Hinde, is generically distinct from Roemeria, EH. & H.; and it is 
not even clear that the two are very nearly related. If the septal 
system of Roemeria had been developed, the genus might be 
regarded as occupying to Syringolites a position analogous to that 
held by Pachypora with regard to Favosites proper; and, possibly, 
this view may be found ultimately to express the real relationships 
‘of the two. Both genera afford transitional links between the 
Fuvositide and the Syringoporide; but their precise relationships 
must in the meanwhile remain more or less a matter of conjecture. 
Genus Caxiapora, Schliiter. 
The genus Caliapora has been proposed by Professor Schliiter for 
the reception of the well-known Alveolites Battersbyi, E. & H., from 
the Devonian rocks of Britain and Germany. I have long been of 
opinion that the peculiarities of A. Battersbyi are such that it is 
worthy of separation from Alveolites proper, as a distinct genus or 
Fic. 4.—A. Tranverse section of Caliapora Battersbyi, E. & H., sp. enlarged 
seven times. B. Vertical section of the same. From the Middle Devonian 
of Dartington, South Devon. i 
subgenus; and J am therefore able to cordially concur in the course 
which Professor Schliter has taken. At the same time I interpret 
the structure of A. Battersbyi in a somewhat different manner, and 
I consider that the familiar Alveolites Labechei of the Wenlock 
Limestone must find a place along with A. Batiersbyi. I cannot, 
therefore, accept Professor Schltiter’s: definition of Caliapora as 
altogether sufficient; and I shall endeavour here to indicate what, 
in my opinion, are the essential characters of the genus. 
In both C. Battersbyi and C. Labechei the corallum has all the 
general characters of that of Alveolites generally, and there is there- 
fore no external feature which distinguishes the genus Caliapora. 
In C. Battersbyi, as pointed out by Schliiter, the corallites are sub- 
polygonal and irregular in shape (Fig. 4); but this character is 
