. Report upon the palaeontology of the province of Ontario [microform]. Paleontology; Paléontologie. 40 'I f. a Diphi/phi/Uum are not connected by horizontal processes ; whilst the latter in its adult state seems to have entirely the habit of an ylalajjora with the internal structure of .S'yrin^w- pura, but equally without connecting Five species of Syringopcrra have;becn recorded by ^Ir. Killings from the Corniferous Lime- stone of Western Ontario, all of which have come under my observation in the same formation. 38. Syringopoua nobilis (Billings). Syringopora nohilis (Bill
. Report upon the palaeontology of the province of Ontario [microform]. Paleontology; Paléontologie. 40 'I f. a Diphi/phi/Uum are not connected by horizontal processes ; whilst the latter in its adult state seems to have entirely the habit of an ylalajjora with the internal structure of .S'yrin^w- pura, but equally without connecting Five species of Syringopcrra have;becn recorded by ^Ir. Killings from the Corniferous Lime- stone of Western Ontario, all of which have come under my observation in the same formation. 38. Syringopoua nobilis (Billings). Syringopora nohilis (Billings), Canadian Journal, New Series, Vol, iv., p. 118. Corallum, lax, spreading, increasing by the production of lateral buds, Corallites very large, varying with age from one and a half lines to five lines in diameter, apparently not connected by transvert^e jirocesses. Septa obsolete; tabuhx: infundibulif .rm. Epitheca thick, with en- circling strioe and stronger annulations. Internally this species has all the characters of Syringoparn ; but the corallites are much larger than in any other known spcoits of this genus, and I have never seen any specimen in which transverse con- necting processes are developed. It is doubtfnl, therefore, if the spe- cies can with propriety be retained under Syringopora. The usual diameter of the is about three linos, but young examples have a diameter of one and a half lines, whilst Mr. Billings states tliat full grown specimens sometimes attain a diameter of no less than five lines. As regards its mode of growth, ;>. is exceedingly like a gigantic .lulnjiora, except that the branches are produced at com- jiaratively longer intervals. Mr. Billings also states that the iufundi- liuliform tahuhe are " so blended together as to product^ a structure somewhat similar to the vesicular tissue of the genus t'l/stiji/iyllum.'' This singul-ir species can always be recnunised by the internal struc- ture, mode of growth, and
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