chief Oeneric Types of Palaeozoic Corals. 293 



the species now known as L. basaltiforme, and which must 

 now stand therefore as the type of the genus (Lithophyl. 

 Britann. Ichnograph., 1699). 



In 1826, Goklfuss described and figured under the name of 

 Columnaria Icevis a fossil coral which woukl appear to be a 

 Lithostrotion (Petref. Germ. tab. xxiv. fig. 8). 



In 1828, Fleming employed Lhwyd's name of Lithostrotion 

 for four corals — of which one is L. basaliiforme^ another is a 

 Lithostrotion but specifically undeterminable, whilst the re- 

 maining two are respectively a Lonsdaleia and an Isastrcea 

 (Brit. Anim. p. 508). 



In 1832, Lesueur seems to have given the name of Stylina 

 to a fossil coral subsequently described by Dale Owen (Geol. 

 Survey of Wisconsin &c., pi. iv. figs. 6 &. Q), from the Carbo- 

 niferous Limestone of Iowa, under the name of Lithostrotion 

 hasaltiforme. The species appears to beL. canadense^ Castelnau. 



In 1836, Prof. Phillips described several species of Litho- 

 strotion from the Carboniferous Limestone of Yorkshire (Geol. 

 Yorkshire, vol. ii. ]d. ii.). L. hasaltiforme appears under the 

 name of Cyathophyllum hasaltiforme ; but the other species are 

 referred to Lithodendron. In this latter reference, however, 

 Prof. Phillijis departed entirely from the characters of the genus 

 Lithodendron as originally defined by Schweigger (Beobacht- 

 ungen, Syst. tab. vi.) ; and though subsequently followed by 

 Lonsdale, his course in this respect cannot be sustained. 



In 1843, Castelnau gave the name of Axinura to the fasci- 

 culate corals placed by Phillips in Lithodendron (Terr. Silur. 

 de I'Am^r. du Nord) ; and in 1845 Mr. Lonsdale expanded and 

 redefined Lithodendron to include the same species of Litho- 

 strotion (Murch., Vern.& Keys. 'Russia and Ural,' Appendix A, 

 p. 597). In the same work Mr. Lonsdale proposed to divert 

 the name of Lithostrotion from the fossil originally figured by 

 Lhwyd under this title, and to apply it to the corals now known 

 as Lonsdaleia. He also founded the new genus Stylastrcea 

 for fossils which he believed to be identical with Lhwyd's 

 coral ; and he created the genus Dij^hypliyllum for some corals 

 of an internal structure nearly the same as that of Stylastrceay 

 but of a fasciculate form. 



In 1846, Prof. Dana proposed to apply the name of Colum- 

 naria, Goklfuss, to the corals now known as Lithostrotion 

 (ExpL Exp., Zooph. p. 363). 



In 1849, Prof. M'Coy published a valuable paper on Carbo- 

 niferous corals (Ann. & Mag. Nat. Hist. 2nd series, vol. iii.), 

 in which he dealt with various corals now usually referred to 

 Lithostrotion in the following manner : — (1) He did not accept 

 the genus Lithostrotion at all ; and he referred the Uthostro- 



