130 CONTRIBUTIONS TO CANADIAN PALAEONTOLOGY. 



The manner of gemmation is shown in one specimen in which a small 

 bud, about two lines in diameter and of the same length, is produced in 

 one of the calicular expansions at a distance of over 2 inches below the 

 broken upper end of the parent. 



On the same tablet with the type specimen is a small fragment, slit 

 longitudinally, in which the tabulae are deeply concave at the centre and 

 turned down at the edges and the primary septa, as seen in a transverse 

 section, extend about half way to the centre, partly as carinse on the 

 tabulfe, and number about forty-seven, making the total number of septa 

 ninety-four. 



Amplexus Yandelli, Milne- Edwards and Haime. 



Plate IX., figs. 4, 4a, 46. 



AiiipUxiis Yandelli, Milne-Edwards and Haime. 1851. Polyp. Foss. des Terr. Palaaoz., 

 p. 344, pi. .S, figs. 2, 2«. 

 ., M Billings. 1859. Canadian .Journal, new series, vol. IV. , p. 123. 



11 n Nicholson. 1874. Palaeon. of Ont. , p. 31. 



Rominger. 187G. Geol. Sur. Mich., Foss. Corals, p. \M, pi. LIV., 

 lower row. 



Original description. — " Polypier trfes-long, cylindroide, irr^guli^rement 

 contourne, montrant des bourrelets d'accroissement et des r^tr^cissements 

 bien marques. Calice mediocrement profond ; le plancher sup^rieur lisse 

 dans une grande etendue. Fossette septale profonde, arrondie, tres-rap 

 prochee de la circonference. Soixante-seize cloisons, alternativement 

 plus grandes et plus petites, minces, droites, tres-^troites. Longeur 7 

 centimetres, diametre du calice 1'5. 



" Devonien. Am^riqu i du Word : chutes de I'Ohio'' (Milne-Edwards 

 and Haime). 



The coral that has been identified with this species occurs in the Corni- 

 ferous formation near Woodstock, Ont. There are three small specimens 

 in the collection, the largest of which is 6 cent, long with a diameter near 

 the upper end of 13 mm.; their form and structure is as follows: — 

 Corallum simple, nearly cylindrical, increasing very slowly in diameter, 

 irregularly curved or flexuous, annulated by ridges of growth, or frill-like 

 expansions, that are at unequal distances apart and of varying prominence. 

 Wall thin, covered by an epitheca that is conspicuously marked longi- 

 tudinally by septal furrows of the same size and transversely by minor 

 growth lines of unequal strength. Tabulae stretching from side to side, 

 flat, turned down at the edges, 1 or 2 mm. apart. Septa from about fifty 

 to sixty in number, of two sizes alternating, the primaries 2 mm. long 

 and denticulated on • their inner edges, the secondaries represented only 

 by uniserial rows of small, rather sharply pointed tubercles. 



