57 



The epitheca carries in young examples one, and in aged example- many layers of coralli' 

 which are arranged in a radiating manner round the central point of the coral, and which open 

 very obliquely on the surface. The calice- are ,.f large size, in general from three-fourth.- of 

 aline to one lino across, and half a line in height. Their shape i- u-ually transversely oval, 

 or three-sided, theouterside being curved, and the two inner sides straight. < (win-to the thin 

 ness of the walls of the corallites, the calices do not appear to be separated by any interspaces 

 tran-ver-ely. but overlap one another. There are no traces of teeth or grooves on the interior 

 of the corallite. 



./A-,,,/,', - Goldfussi is nearly related to three European species, viz., ./. .>///<-. .//,/,//</. 

 (Lam.)././, Edwards and Haiine), and J. '//"/< Edwards and I laim<- >. the first from 



the Devonian formation, and the two last from the Tpper Silurian Kock-. From the tirst of 

 these the piv.-ent .-pccie- is separated by the slightly larger dimensions of the corallites, and 

 by the fact that the calice- are destitute of the groove and corresponding process or ridg< 

 which are such a marked feature in the former. Alveolites Labechci, again, has decidedly 

 -mailer corallites, and the calices have an internal process, similar to that of ./. gub-orb\ 

 though not so prominent. 



-tly, ./ th'.ugli larger than ./. ///.-> or ./. /.//<.'//</, neverthe- 



less hi- -mailer corallites than tho-<- of ./. i;,,/,//'//.^/ ; whilst the inner surface of the inferior 

 oalicina] edge carries a di-tinct elevated process. A- regard- the -peeie- of .1 V //As known in 

 the Devonian Hock- of North America, .1. (!<:! la too distinct to render any confusion 



possible. 



I. ''//// ///,-/ I-'nriiiiifiuii. Abundant, and attaining a large -ize, in the Hamilton for- 

 mation of l!aitlett's Mills, near Arkona, 'I'ownship of Bosamjuet. 



. ALVEOLITES FISCHERI (Billings). 

 A ( Billing- 1. Canadian Journal, New Series vol. V., p. _"'''>. tig'. 6. 



rallum in the form of a flattened, palmate or undulating expan-ion. which appears to 

 have grown in an eivet po.-ition from a strong root-stalk, and which i- eelluliferou- on both 

 -ides. Size of the entire corallum unknown, but certainly large, fragment- of several -qnar. 



J 



inches in area being apparently not uncommon. Thickness from le than one line to tour 

 lines ; cc-rallit.-- oblique to th-- .-iirface, the calices being tran-v-r-el\ oval on the whole, usually 

 with one eiirved and two -traight -ide-, -ometinn-s diamond-shaped, with four -traight .-ide-. 



In typical examples the c&lioes have a long diameter of ahoat half a lim- -ometime- more 



and a -liort diami-t.-r of about a fourth of a line ; and they are -eparat.-d by intervals of about 

 h ilf a line or li--s mea-up-d either vertically or transver-ely acro-< the frond. Tin 1 interior 

 of the calice exhibit- no internal proce.-.- or ridge. 



According t.i Mr. fillings the calices in thi- -peeie- an- "distant from each other abonl 

 two third- of a line in tin- \.-rtieal, and a litre 1.--- in the transverse direction of the frond. 

 I ha\v. however, Been no example.- in which the calice- are BO remote a- thi- ; and I can only 

 -uppo-i- that Mr. Hilling- mu-t ha\e taken hi- im-a-urements Iroin older and larger specimens 

 than anj which have e,,me under my ob-ei vatioii. 



.1 / //.//' in -oine iv- pee i- i- elo-ely allied to ./.'.' <'/,'' - and /.-' ; / -'/. 



but it differs in it- _. n.-ral form altogether. Mn.-e it i- eellulif.-r-u- .. n botli of it- -ido . in-t 

 of ha\ ing the i-o rail ite- ..pen ing on t he upper .-iirface, w hi l-t the under -iirface [gOOVl red by an 

 epiih.ei. li i, also di-tingui-hed b\ the proportions of it- eorallite-, which are uniformly 

 Smaller 'ban in ./. Goldfli . and which do not carry the internal ; !' I. 



Mr I'ni: -rd- the -p.-eies from the Hamilton formation, but 1 have also found it, 



though r;m ly. in the I 'oniifcroii- Lime-ton.-. 



Locality and I ( iraiferonj Limestone of Port Colborne, Hamilton formation, 



Bar Mill-, i ear Ai kona, 'I'own-bip of |{o-aii(|Ui-t 



li~. A l.\ 'Kill. I I K- KIHi.M'i - ' \iehol-o; 



.-/ \ i.-hol-i.n . ' '., Pob., 1874. 



('..ralliim formim. lon-at, d. -nn time- palmate expansions, whidi app--ar to hav. 

 in an . itimi from a moled ba.-e, and whi.-h ai. .ellulif.Tou- --n the two - 



