ORIGINAL COMMUNICATIONS. 
On New Forms of Diaromacem, from Drepaines off the 
Arran Istanps, Co. Gatway. By the Rev. EuGENE 
O’Meara. Second Series. 
In my first communication on this subject I ventured to 
express my opinion that a more careful examination of the 
material would lead to the discovery of other new and in- 
teresting forms, and I have now the gratification to inform 
you that my anticipations have been fully verified. I have 
been engaged from time to time, as opportunity was 
afforded, in examining the material, with most satisfactory 
results. Some few of the forms recently discovered I shall 
now submit to your notice. 
Coscinodiscus fasciculatus, n. sp., O’M., Pl. VII, fig. 1, 
x 600.—Diameter '0033. Valve areolate, the areole or cellules 
arranged in parallel bundles, about sixteen in number. Each 
bundle contains nine parallel moniliform lines; the central 
line reaches from the centre to the circumference, the next 
lines on either side of the same length, each successive pair 
terminating at a greater distance from the centre. 
This form is exceedingly rare; only one specimen has as 
yet come under my notice, and this an imperfect one, but 
still sufficient to indicate the characteristics. It is, therefore, 
not without some misgiving I venture to notice it, although 
the marked peculiarities of it, as I consider, justify me in 
doing so. 
In respect to the fasciculate arrangement of the areole, 
there is a great similarity between this species and Coscino- 
discus symmetricus and C. Normanni. ‘The areole, how- 
ever, are smaller than in the former species, and larger than 
in the latter. 
Eupodiscus eccentricus, n. sp., O’M., fig 2, x 800.—Dia- 
meter about ‘0014. Surface of the valve distinctly areolate. 
The areole, which are larger towards the centre than towards 
the circumference, are arranged eccentrically. There is a mar- 
ginal blank space, in which the processes, about twenty in 
number, are placed at equal distances. 
VOL. VII.—NEW SER. s 
