10 Mr. F. M‘Coy on some new genera and species of 
Forms small masses in the carboniferous limestone of Derby- 
shire. 
(Col. University of Cambridge.) 
Strombodes. 
Strombodes (Schweigger, not of Lonsdale) = Lithostrotion 
(Lonsd.). 
This genus is defined by Prof. Schweigger (Beobachtungen 
auf Naturhistorischen Reisen, &c. tab. 6) as “ Cellule lamellose, 
centro depresso. Stirps e conis lamellosis in strata horizontalia 
conjunctis. Cellula terminalis cyathiformis.””? And he makes 
two divisions: Ist, “cont e centro proliferi,” for which he refers 
to the ‘ Ameenitates Academic’ of Linnzeus, vol. i. pl. at p. 312, 
figs. 11 and 4 (this figure however shows the origin of a marginal 
bud at one point). His 2nd group, “ coni e disco prolifert,” and 
the reference to the same plate, figs. 10 and 3, belong to a true 
Cyathophyllum (C. dianthus, Gold.) ; his 1st group and the refer- 
ence to the figures and description in the ‘ Ameenitates Acade- 
mice’ must therefore be taken as the type of the genus, and seem 
fully to justify the reference by Goldfuss of his American Strom- 
bodes pentagonum to this genus, the more so when the reference 
in Fougt’s description, above referred to, to fig. 18 of the above 
plate, is taken into account. A coral perfectly similar to that 
of Goldfuss has been also figured by Mr. Dana in ‘ Silliman’s 
Journal’ as an example of Strombodes. As therefore the notion — 
that those compound polygonal-celled corals are the true Strom- 
bodes of Schweigger seems to prevail extensively, and I think 
justly, it only remains for me to add, that having carefully ex- 
amined authentic specimens of the S. pentagonum, | find the cone- 
in-cone appearance of some of the figures to be produced by a 
peculiarity of weathering by which many of the vesicular plates 
towards the circumference of the stars have fallen out, eat that 
the coral truly possesses all the characters so admirably eluci- 
dated by Mr. Lonsdale in the ‘ Geology of Russia’ under the title 
of Lithostrotion, a name which it would be well now to replace 
by the old title Strombodes of Schweigger. In no case could 
either the definition or references of Schweigger justify the placing 
those Silurian and Devonian corals called Strombodes by Mr. 
Lonsdale in this genus. The following species is generically 
placed in accordance with this view. 
Strombodes conaxis (M‘Coy). 
Sp. Char. Columns irregularly aggregated, averaging half an inch 
in width, mostly hexagonal: avis elliptical, formed of a series 
