SILURIAN CORALS. 



683 



Shores of the Baltic, Fougt. ; Nietzwitz in Lithuania Guettard ; Osmundsberg in Da la- 

 car Ha, Hisinger, Groningen, Goldfuss j Eifel, Goldfuss, Schlotheim ; Lake Erie and 

 Drummond Island, Goldfuss. 

 Favosites multipara, sp. n. Lons. PI. 15 bis. f. 5, 5a to 5 c. nat. size, 5 under surface, 5 a vertical 

 section, 5 b detached tubes showing the pores, 5 c weathered upper surface. 

 F. discoid, under surface grooved concentrically, but marked with the lower terminations of 

 the tubes ; upper surface flat, covered with the scale-like openings of the tubes. Tubes hexa- 

 gonal, composed of two narrow opposite planes, and four broad ones, variable in their propor- 

 tions ; position vertical or slightly curved towards the base ; sides pierced by numerous pores 

 irregularly disposed and not uniform in size ; interior traversed by horizontal septa. 



This species is distinguished by the number of the pores, which in some places give the tubes 

 the net-work character of Alveopora. From that genus, however, this fossil is distinguished by 

 the transverse horizontal septa. A specimen of the cast of the upper surface contained in the 

 collection, bears a singular resemblance to a shagrin fish-skin, f. 5 c. 

 Formation and locality. Wenlock Limestone, Marloes Bay. 

 Favosites fibrosa (Goldfuss), PI. 15 bis. f . 6, 6 a to 6 /.— 6 vertical section nat. size, 6 a tubes mag- 

 nified showing the transverse lamellse, 6 b transverse section of a globular specimen with indi- 

 cations of the angular foramina, 6 c another in which they are very distinct, 6 d portion of the 

 same magnified 3 times, 6 e and 6/ a vertical radiating specimen nat. size and magnified. 

 Syn. and Ref. Millepora ramis vagis punctis sparsisf Fougt. 1745, Amcen. Acad. T. 1. p. 201, 

 fig. 12, 1749. 



Calamopor a fibrosa, Goldfuss, Petref. pp. 82, 215, Taf. LXIV. f. 9, 1826. 

 Favosites fibrosa, Goldfuss, Petref. Corrigenda, p. 245, 1833. 

 Chaetetesf Fischer, Oryc. de Moscou, Tab. XXXVI. 1830. 



Favosites microporus, Steininger, 1831, Mem. Soc. Geol. France, T. 1. p. 337, 1834. 



This species appears to have a great geological range in the Silurian System. It is also abun- 

 dant, and the varieties incident upon growth are numerous. Some specimens are globular, others 

 are cylindrical, and many are branched. The connecting angular foramina are occasionally 

 well displayed, either in parts or over the whole of a specimen ; but they are oftener not to 

 be detected, and the fossil then strongly resembles the Chaetetes of Fischer. At Golden Grove, 

 Old Radnor, Botville, and other localities, occurs a slender-branched coral, composed of fine 

 angular tubes, radiating from an imaginary axis (7 nat. size, *Ja magnified). I have not been 

 able to detect satisfactorily connecting foramina ; but from a careful comparison of the speci- 

 mens with others belonging to thick-branched varieties of Favosites fibrosa, in which the 

 connecting foramina are partially exposed, no perceptible difference has been observed. In 

 the impure limestone of Bala, a similar fossil is found. In the mountain limestone of Steer- 

 aways small fragments of a coral not distinguishable from this variety have also been noticed. 

 Formations and localities in England. Upper Ludlow, Hanway, and Birches Common near 

 Ludlow; Middle and Lower ? Ludlow Rock, Aymestry, Caynham Camp; Wenlock 

 Limestone, Chain Bridge near Usk ; Haven near Aymestry, Old Radnor ; Caradoc 

 Sandstone, Horderly and Wittingslow , Salop, Ankerdine Hill, Llandovery ; Llandeilo 

 Flags, Rorrington near Shelve, Salop. 

 Foreign localities and authorities. Eifel, Goldfuss, Steininger ; Bensberg, Goldfuss ; Lexing- 

 ton in Kentucky and Bivffalo Creek, Canada, Goldfuss. 

 Favosites spongites (Goldfuss), PI. 15 bis. f. 8, 8 a to 8e. — 8 upper surface nat. size, Sa and 8Z>ver- 



