682 



SILURIAN CORALS. 



The size of the tubes of this species, as well as of F. Gothlandica, varies considerably. The 

 difference in the development, and in the apparent position of the angular foramina, is likewise 

 often so great, that detached portions of the same specimen might be thought specifically 

 different. In the magnified portion (1 a) of f. 1, many of the variations in the character of the 

 foramina are exhibited. Where (f. 1 a*) the fracture has exposed the tubes with the sides in 

 juxtaposition the foramina lock into each other, and alternate, and there are no interstices ; 

 but where (f. 1%*) the angle of one tube is exposed, opposite to the angle of another, the fora- 

 mina unite and interstices are visible for the passage of the intermediate foramina of two other 

 tubes. In some parts of this specimen the foramina are scarcely discernible, even with a 

 lens; while in others they stand out in bold relief, and are perceptible to the touch. 



Small globular masses, having a honey-comb surface, are common at Dudley, Wenlock and 

 other localities, and belong either to F. alveolaris or F. Gothlandica. 



Formations and localities in England. Middle and Lower Ludlow Rock, Mock tree Hill, 

 Aymestry, Tatton Edge; Wenlock Limestone, Wenlock, the Pur lieux, Malvern, Haven 

 near Aymestry, Leinthall Earls near Ludlow, Hurst Hill near Sedgley, West flanks of 

 Malvern Hills, Abberley, Little Ridge, East hope, Winslaiv Mill, Fownhope, Westhoye, 

 Woolhope ; Caradoc Sandstone, Potvis Castle, Cefn-y-garreg. Llandovery. 



Foreign localities and authorities. Eifel, Goldfuss, Steininger ; Groningen, Goldfuss. 

 Favosites Gothlandica (Lamarck), PI. 15 bis. f. 3, 3 a, 4. — 3, 3 a nat. size and magnified one half ; 



4 is a section exhibiting change in the number of the connecting foramina. 



It has been deemed advisable to include in one species, F. Gothlandica and F. basaltica, as 



the distinction, founded upon the sides of the tubes being perforated by two rows of pores or by 



one row, has not been found to be satisfactory. In f. 4. both characters are exhibited in the 



same specimen, and other similar instances have been noticed. 



Syn. and Ref. Coralloidea oblonga pentaedra, Woodward Nat. Hist. Foss. T. 1. p. 136, x 

 1729. 



Corallium Gothlandicum, Fougt. 1745, Linn. Amoen. Acad. T. 1. p. 211. f. 27, 1749. 

 Astroite demi-spherique ? Guettard, Mem. T. 2. pp. 438, 499, PI. XVI. f. 2. PL XLV. f. 1, 

 1770. 



Favosites Gothlandica, Lamarck, 1st Edit. Anim. sans Vert. T. 2. p. 206, 1816; Schweigger, 

 Beobacht. VIL, 1819; De France, Die. Sc. Nat. T. 16, p. 298, 1820; Lamouroux, Expos. Me- 

 thodiq., p. 66, 1821 ; Parkinson, Outlines, p. 69; Org. Rem. vol. ii. p. 69, PI. VIII. f. 3, 7, 

 1822 ; De Blainville, Man. d'Actinol., p. 402, PI. LXII. f. 4, 1834, F. Gothlandica and F. ba- 

 saltica, Milne Edwards, 2nd Edit. Lamarck, T. 2. p. 303, 1816. 

 Spongites favus, Schlotheim. Petref. p. 369, 1820. 



Calamopora Gothlandica, C. basaltica, Goldfuss, Petref. p. 78, Taf. 26, f. 3, 4, 1826; (Favo- 

 sites corrigenda, p. 245, 1833) Ehrenberg 1831, Abhandl. Konig. Akad. Berlin, 1832, p. 346. 

 Hisinger, Lethaea Suecica, p. 96, Tab. XXVII, f. 4, 5, 1837. 

 Sarcinula angularis, Fleming, Brit. Anim. p. 508, 1828. 



Favosites prismaticus, Steininger, 1831, Mem. Soc. Geol. France, T. 1, p. 335, 1834. 



Formations and localities in England. Middle Ludlow Rock, Aymestry, Tatton Edge, 

 Downton-on-the-Rock ; Lower Ludlow Rock, Sitch Wood, Ledbury , Westwood Common, 

 Wenlock; Wenlock Limestone, Wenlock, Wren's Nest, Dudley, Evenhay ; Caradoc 

 Sandstone, (Upper calcareous beds) Daniel's Wood, Tortworth. 



Foreign localities and authorities. Gothland, Schlotheim, Lamarck, Goldfuss, Hisinger ; 



