438 THE MEDALS OF CREATION. Cuap. XI. 
CARBONIFEROUS SystEM. Jy. 308. Wond. p. 736. 
Producta punctata; Wond. p. 736. 
Martini; Ly. fig. 390. 
Pleurotomaria flammigera; Lign. 136, fig. 4. 
Euomphalus pentangulatus; Lign. 136, fig. 1. 
Natica plicistria; Lign. 136, fig. 3. 
Spirifera trigonalis; Wond. p. 736. 
————- triangularis; Wond. p. 736. 
———- glabra; Ly. p. 389. 
Serpula carbonaria; Ly. fig. 375. 
Avicula papyracea ;—fig. 378. 
For the shells of the Mountain Limestone, reference should be 
made to the second vol. of Prof. Phillips’s “Geology of Yorkshire ;” 
to Prof. M‘Coy’s “ Carboniferous Limestone Fossils of Ireland ;” and 
to Prof. de Konick’s “ Anim. Foss. Belg.” The fossils of other por- 
tions of the Carboniferous System are illustrated in Phillips's 
“Paleozoic Fossils of Devon ;”* and in Prestwich’s Memoir on Coal- 
brook Dale (Geol. Trans.). ° 
MAGNESIAN. LIMESTONE AND Trias. Ly. p. 301. 
Producta calva; Ly. p. 203, fig. 337. 
Spirifera undulata ;—fig. 338. 
Posidonia minuta ;—p, 288, fig. 321. } Triassic. 
Avicula socialis ;—fig. 322. 
\ Permian. 
Prof. King’s elaborate Monograph on the Permian Fossils (pub- 
lished by the Palzontographical Society) should be consulted by the 
student. 
Liss. Ly. p. 273. 
Pleurotomaria Anglica; Ly. p. 39. 
Avicula ineequivalvis; Ly. fig. 302. 
Plagiostoma giganteum; Ly. fig. 303. 
Gryphea incurva; Jign. 127. 
* To prevent confusion, it may be necessary to state that Professor 
Phillips, in the work referred to, terms the Silurian strata the “lower 
paleozic,” and the mountain limestone, the “ wpper paleozoic.” 
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