Foerste.] 
338 
[May 1, 
Ludlow Falls, Ohio. In it ten tubes occupy a length of 7 mm., the 
vertical height of the entire zoarium being 17 mm., the width about 
the same, while the contortion of the walls is such as to enclose 
from fifteen to twenty very irregular spaces. The next largest form 
is from the same localit}^, five tubes occupying a length of 5 mm. 
The form next in size and of more general occurrence is found fre- 
quently at Fair Haven, Ohio. In it five tubes occupy a length of 
8 mm. Horizontal diaphragms frequently cross these tubes in a 
proportion of ten diaphragms in a length of 6 mm. This form not 
infrequently has a vertical height of 100 mm. It is also found at 
Soldiers’ Home, Ohio. 
Halysites catenulatus nexus var. nov. 
At Collinsville, Alabama, a form occurs which can readily be 
distinguished from the normal t} T pes of the species by the large size 
of the tubes compared with the generally short size of the corallum. 
There are usually four tubes in a length of 9 mm., the zoarium 
usually not exceeding 45 mm. in height. Owing to the large size 
of the cells and the small height of the zoarium as a whole, the 
tubes spread out very rapidly from the base as a centre, all the 
tubes tapering more or less rapidly towards the base, and giving a 
side view of the wall a very different aspect from those forms where 
the tubes are more nearly parallel. In all other respects it seems 
to be identical with the species. 
Syringopora (Drymopora) fascicularis. 
This species is fairly common at Ludlow Falls, Ohio, and at Fair 
Haven, Ohio. The tubes vary from .7 mm. in the Ludlow Falls 
specimens and .8 mm. in the Fair Haven specimens as the most fre- 
quent diameters to 1.1 mm. as a maximum. The tubules branch 
and again become connected with each other by approximation, 
without the intervention of narrower transverse channels. No sep- 
tse, or septal spicules were noticed in the tubes. Diaphragms of 
any sort were also not seen, but this is a less important observation 
since careful search for the same was not made. The exterior of the 
tubes is finely wrinkled transversel} T . This species may be readily 
distinguished from S. JibrcUa, Rotninger, by the larger size of the 
tubes and the absence of radial crests, and from Homing evict vannula , 
W. J. Davis, by its smaller tubes and far less pronounced fasciculate 
