39 
VIII.— NOTE ON A EUROPEAN SPECIES. 
Else it e r- Ben zo n described, under the name of II. cavernosa , a Halysites in 
which the tabulae of the mesopores are incomplete and vesicular. Lambe 
also figured a Canadian II. catenularius (so called) with the mesoporal tabulae 
arched, and to some extent vesicular also. 
In the Australian Museum Collection is a European coral said to be 
from Holmestrand in Norway, and labelled II. labyrinthica, Goldf. Sections 
of this (Plate IX, Eigs. 5 and 6), prepared for the microscope, exhibit all the 
characters shown in H. cavernosa, E.-B. — wide autopores with occasional 
incomplete tabulae, narrow mesopores carrying arched and vesicular tabulae 
in longitudinal section, and cellular mesopores in transverse section. In 
fact, whatever H. cavernosa, E.-B., may he, I am convinced this Norwegian 
coral is also. I am iuduced to refer to this matter simply in confirmation 
of some of Eischer-Benzon’s observations. The mode of growth, outline, 
and size of the fenestrules, &c., are certainly those of H. labyrinthica, 
Goldf., and it is possible that the latter and ZZ. cavernosa may be identical. 
