CO ea ee 
Fig. 
Mr. F. M‘Coy on Paleozoic Corals and Foraminifera. 119 
EXPLANATION OF PLATE VII. 
ab ed, four figures of fibrille after Muys. 
‘* A fibre covered with cellular membrane at the upper part,’’ cross- 
striated and splitting up into fibrillz at one end: after Fontana. 
Diagram of fibrillze after Bowman. 
. Diagram to illustrate the views of Sharpey, Lealand and Carpenter: 
a, two fibrils united; 6, single fibril, with each sarcal particle ha- 
ving a dark central and clear outer part. 
. Diagram of two fibrillze to illustrate the views of Mr. Erasmus Wil- 
son: a, usual appearance of fibrille; 6, a very much stretched 
fibril to show the dark and clear spaces, each divided into four. 
Diagram to show the fibrillz in the distinct and superficial focus : 
a, fibrils in distinct focus; 6, fibrils in superficial focus from the 
frog. 
. Diagram of two fibrils from the lobster: a, fresh fibril much 
stretched, showing scalloped edges of clear space ; b, similar fibril 
unstretched, showing clear space apparently dark from its nar- 
rowness. 
. Diagram to illustrate a membrane observed among the fibrille : 
a, membrane as seen in frog and salmon; J, similar membrane 
observed among fibrille of the muscle of skate, perfectly fresh. 
. General appearance of a dissection of muscular fibre from the frog, 
magnified about 500 diameters. 
XIII.— On some new genera and species of Paleozoic Corals and 
Foraminifera. By Frepertck M‘Coy, M.G.S. & N.H.S.D. &e. 
[Continued from p. 20.] 
Stylaxis (M‘Coy), n. g. 
easily separable tubes, inter- 
nally divided into three areas: 
vertical section, 1st, a thin, flat, 
straight axis; 2nd, a broad in- 
ner area composed of nume- 
rous curved vesicular plates m 
irregular rows converging up- 
wards to the axis; 3rd, an outer 
area on each side composed of 
smaller and more curved vesi- 
cular plates, in rows inclining 
obliquely upwards and out- 
wards: horizontal section dis- 
playing the central flat axis 
surrounded by radiating la- 
mellz extending from the walls, 
and connected in the outer area 
Gen. Char. Corallum composed of adjacent polygonal, prismatic, 
a. Mode of growth and division of 
stem; 6. horizontal section ; 
c. vertical section. 
by numerous transverse vesicular plates: additional columns 
