686 



SILURIAN CORALS. 



Millepora catenularia, Esper. Petrificata, Tab. V. ; Pfianzenthiere, Erster Theil, s. 260 note. 

 1795. 



Chain coral, Parkinson, Org. Rem. vol. ii. p. 20. Pi. III. f. 4, 5, 6. 1808. 

 Catenipora escharoides Lamarck, 1st Edit. Anim. sans Vert, tome 2. p. 207. 1816 ; Lamouroux, 

 Expos. Methodiq. p. 65. 182 L ; Schweigger, Beobacht. Tab. VII. 1819 ; Goldfuss, Petref. p. 74. 

 Taf. XXV. f. 4. 1826 j Steininger, 1831, Mem. Soc. Geol. France, 1. 1. p. 341. 1831 5 Ehren- 

 berg, 1831, Abhand. 1831, Konig. Akad. Berlin, p. 344. 1832; De Blainville, Man. d'Actinol. 

 p. 352o PL LXII. f. 1. 1834 5 Milne Edwards, 2nd Edit. Lamarck, t. 2. p. 322. 1836 ; Hisinger, 

 Lethiea Suecica, p. 94. Tab. XXVI. f. 9, 10. 1837. 

 Tubiporites catenarius, Schlotheim, Petref. p. 366. 1820. 



Holy sites 1 — Fischer, Oryc. de Moscow, 1830; Haly sites escharoides, Bronn, Lethaea 



Geognostica, p. 52. 1835. 



In the series of specimens procured by Mr. Murchison, the tubes vary considerably in size, 

 independently of the age of the bed ; and in a specimen, in which they are not more than one- 

 thirtieth of an inch in diameter within the walls of the tubes, the rows or lamellae are contorted, 

 and very rarely anastomosed. The tubes, in the small varieties, are also in many instances equally 

 oval with those in the larger. It has therefore not been thought necessary to preserve the 

 distinction of two species, C. escharoides and C. labyrinthia, the latter having been founded 

 on the greater size of the tubes, the contorted arrangement of the rows, and their rarely 

 anastomosing. 



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

 Downton on the Rock ; Wenlock Limestone, Lincoln Hill, Wenlock, Dudley , Fownhope, 

 Newsivood in Eastnor Park, Netherlye near Aymestry, Woolhope; Little Ridge, Easthope, 

 West flanks of Malvern Hills; Wenlock Shale and Upper beds of Caradoc, I lug hi ey, 

 Salop, South end of Lickey; Llandeilo Flags, Roheston W at hen, and Sholeshook in 

 Pembrokeshire. 



An hemispherical mass sixteen inches in diameter was found at Netherlye, Aymestry, in 

 Wenlock Limestone by the Rev. T. T. Lewis. 



Foreign localities and authorities. Shores of the Baltic, Fougt ; Gothland, Knorr, Alex. 

 Brongniart, Goldfuss, Schlotheim, Hisinger; near Ratofka, Government of Moscow, 

 Fischer; Eifel, Schlotheim, Steininger, Goldfuss; Drummond Island in Lake Huron, 

 Bigsby. 



Porites, Lamarck : sub-genus of Madrepora, Ehrenberg. 



The first of the following species is placed in this genus on the authority of Ehrenberg, and 

 the remainder because they have only twelve rays. It is probable, that it will be found ne- 

 cessary, hereafter, to place some of the species in a distinct genus. 



Porites pyriformis, (Ehrenberg,) PI. 16. f. 2, 2 a to 2e. — 2, 2 a upper surface nat. size and magnified, 

 2b, 2c horizontal section nat. size and magnified, 2d vertical section with the transverse la- 

 mellae, 2e vertical section without them. 



Syn. and Ref. Millepora subrotunda, Fougt, 1745 ; Linn. Amcen. Acad., t. 1. p. 203, f. 24. 

 1749. 



Heliolithe pyriforme, Guettard, Mem., t. 3. p. 454. PI. 22. f. 13, 14. 1770. 



1 Fischer's generic name of Halysites is of anterior date to that of Catenipora of Lamarck ; but the latter having 

 been generally adopted by zoologists, it has been considered advisable to retain the use of it. 



