F, B. Meek—Fossils of the Illinois Geological Report. 487 
preservation of the specimens than to any natural distine- 
In the Proceedings of the Philad. Acad. Nat. Sci. for 1870, 
we published some remarks on this subject, showing that Dr. 
Prout's proposed genus Septopora agrees in all essential generic 
characters with Prof. King’s older genus Synocladia ; and that 
Prof. Swallow’s Synocladia virgulacea var. biserialis is entirely 
distinct specifically from the European & virgulacea Phillips 
(sp.), but almost certainly identical specifically with the type 
of Dr. Prout's proposed genus Septopora. In the Paleontology 
of Eastern Nebraska, plate vit, published in Dr. Hayden’s 
Nebraska Report of 1872, I have also fully illustrated the well 
defined specific differences between the so-called variety biseri- 
alis, and the foreign S. virgulacea. 
It is all the more important that the true relations of the 
American form diserialis to the proposed genus Séptopora, as 
well as to the real Synocladia virgulacea of Europe, should not 
be lost sight of, because its occurrence here in certain Cual- 
*It we hi _ to explain here that Dr. Prout’s figures of his type, este 
i satisfactory. 
descri; 
figs. 14a, b, c were drawn from one of his typical : 
It should be stated just here, that Dr. Etheridge of London has recently,de- 
erons ln " a het » Nat. Hist. vol. xii, fourth 
limestone (See Ann. and Mag. tans of 
8 li of Midlothian. 
mien p. 189, pl. 8, 1873.) He also adds poserabve nosy on es 
ia King and Septopora Prout, sustaining our views point, 
tained in the paper shove aliuiled és, published in the Proceedings of the Philed. 
Acad. Nat. Sci. in 1870, 
