THE 



GEOLOGICAL MAGAZINE. 



NEW SERIES. DECADE IV. VOL. IX. 



No. VIII.— AUGUST, 1902. 



OE,IC3-in^-A.L ^^liTIGXiES. 



L WOODWARDIAN MuSEUM NOTES : SaLTER's UnDESCRIBED 



Species. IX.^ 



By F. R. CowpER Reed, M.A., F.G.S. 



(PLATE XVIII.) 



MoNTicuLiPORA (Monotrypa) poculubi, Salter. (PI. XVIII, Figs. 1-3. ) 



1873. Monticulipora poculum, Salter MS. : Cat. Camb. Sil. Foss. Woodw. Mas., 



p. 109 (a 314). 

 1891. Monticuli23ora (?) poculum, Woods : Cat. Type Foss. Woodw. Mus., p. 25. 



There are eight specimens (a 314) to which Salter gave this name. 

 All are from the Wenlock Limestone of Dudley, and belong to the 

 Fletcher Collection. Only one shows any part of the upper surface. 



Diagnosis. — Corallum circular, broadly cup-shaped or crateriform, 

 sharp-edged, thin. Cup shallow, concave. Base convex, broadly 

 conical, attached by apex, covered by thick concentrically wrinkled 

 epitheca marked with fine radiating striae, and in some cases furnished 

 with a few short root-like processes on the sides. Corallites radiating 

 from centre of base, regular, hexagonal or polygonal, of equal or 

 subequal size, thin-walled, crossed by a few horizontal or oblique 

 tabulse. Minute, thick- walled tubuli ('spiniform corallites') present, 

 usually one at each angle of junction of adjacent polygonal corallites. 



Measurements. 



Eemarks. — The peculiar shape of the corallum, the thick striated 

 epitheca, and short corallites separate this species from M. discoidea,'^ 

 James, to which it has several points of resemblance, i.e., the 

 thin-walled subequal corallites, the epithecal cover, the spiniform 

 corallites, and the absence of monticules. The 'spiniform corallites' 

 are not quite so abundant in Salter's species as in M. discoidea, and 



1 For pre^dous articles see Geol. Mag., 1901, pp. 5, 106, 246, 355, and 576; 

 1902, pp. 122, 145, and 256. 

 ^ Nicholson : Struct, and affin. genus Monticulipora, 1881, p. 193, and references. 



DECADE IT. TOL. IX.— NO. YIII. 22 



