Paleozoic Corals and Foraminifera. 15 
writer. I am unable to afford any information on what would 
under the circumstances be the most. interesting point, namely 
the mode of production of new columns: taking all the circum- 
stances into consideration, I suspect the mode of increase was 
similar to that I have described in Lonsdaleia generally, the ex- 
ternal prismatic form (which is of itself of no value) being pro- 
duced by the pressure of a closer mode of growth than in the 
LL. duplicata. As it is impossible to conceive a Strombodes (or 
Lithostrotion) splitting into easily-separable columns, I provi- 
sionally therefore place it in Lonsdaleia. 
Rare in the carboniferous limestone of Kendal. 
(Col. University of Cambridge.) 
Nemaphyllum (M‘Coy), n. g. 
Gen. Char. Corallum composed of numerous inseparably united, 
polygonal, prismatic tubes, each having a straight, thin, fiat, 
fillet-lke solid, or nearly solid, 
axis, from which, in the homie 
zontal section, the fine nume- 
rous radiating lamelle are seen 
extending directly to the walls ; 
radiating lamella connected by 
very fine transverse dissepi- 
ments only visible externally in 
the outer area: vertical section 
shows three distinct areas ; 
Ist, the thin flat axis; 2nd, a 
sharply defined cylinder of very 
minutely vesicular arched plates, 
the rows directed from the axis Sechion ane terminal ars of Ne- 
1 La um: Aaa. aXes; oung 
i gig uc maids BaaioNs d bud witthin ¢ the area of the pied. 
area of similar small arched plates forming a minutely vesi- 
cular structure slightly smaller than that of the inner zone, 
but the rows directed obliquely upwards and outwards : repro- 
duction by small circular buds developed within the area of the 
parent star. 
In mode of reproduction and tri-areal structure this genus ap- 
- proaches Strombodes (as above understood), from which it differs 
altogether in the nature of the axis, which in all the species of 
that genus is cylindrical, composed of numerous plates variously 
twisted together, and giving a cellulose section in every direction ; 
the axis of the present group on the contrary forms a thin, flat, 
simply solid lamina, and is exhibited in a vertical fracture either 
as a narrow opake white line, or as a broad mbbon-like fillet, ac- 
cording to whether the section is in the direction of its width or 
