be 
4 
G 
4 
‘ 
im 
a 
Paleozoic Corals and Foraminifera. 5 
- section, radiating lamelle meeting and complicated in the cen- 
tre, connected by very thin transverse- vesicular plates, and 
the stars of the compound species separated by thick divisional 
walls: budding in the compound species marginal, in the sim- 
ple species often exhibiting periodical death and continuance 
of growth from the centre, giving an imbricating “ringed” 
appearance to the exterior. 
This genus is most allied to Cyathophyllum and Clisiophyllum, 
all three having simply conic and compound polygonal-celled 
species. Strephodes differs from Cyathophyllum by the equality of 
the radiating lamell and their meeting in the centre both in the 
terminal cup and horizontal section, and in wanting the transverse 
diaphragms ; from Clisiophyllum, which it resembles in the meet- 
ing of the lamelle in the centre and the absence of horizontal 
diaphragms, it differs in the centre (though often slightly pro- 
jecting) not being elevated into the large tent-like cone, charac- 
teristic of that genus, and in the rows of vesicular cells in the 
vertical section not having the reversed upward curvature which 
is connected with that peculiar form of cell. The simple species 
have been placed—I cannot imagine why—in the genus Strom- 
bodes of Schweigger by Mr. Lonsdale and some others (see the 
observations below on this latter genus). The compound species 
differ from Astrea, with which many paleontologists confound 
them, by the solid boundary-wails to the cells (see note on this 
genus below), and from Acervularia(Schweig., not Lonsd.) by 
the marginal budding and want of the central tube of that 
genus. 
The genus Streptoplasma of Hall in his recent volume on the 
Paleontology of New York, although defined nearly in the same 
manner, and the name having the same meaning, applies ob- 
viously according to his specific descriptions and figures of all the 
species, not to the present corals, but to those known in Europe 
under the names Petraia and Turbinolopsis, in which the lamellee 
extend directly and simply almost to the centre, only the most 
minute portion of the centre exhibiting in some species a trace 
of twisting, and there being none of the vesicular plates between 
the lamelle which are so strongly developed in the present 
group. 
Strephodes multilamellatum (M‘Coy). 
Sp. Char. Elongate-conic, very gradually tapering (generally 
about 5 inches long, with a diameter of about 14 inch at the 
termination) ; terminal cell oblique, oval, the short axis about 
one-third less than the long; surface regularly girt at about 
every quarter of an inch with slightly oblique, strong cup- 
