35 



this latter character may depend simply upon the fact that the sm-dl secondary septa were 

 neglected in the enumeration. Upon tlu whole, however, it is safer to keep /.'. S 

 di-tinct. 



Lornl'ili/ and For, . lYmnin in the CorniferouB Lime-tone of Port Colborne, 



Ridgeway, Lot G, Con. 1, Wainfleet, and also, according to Billing, near the Town of Siincoe. 



ERIDOPnTLLUM V KRNKI 1 l.AM'M (Edwar-'s and Hain 



EridophyUum V< / (Edwards and Haime), Pol. l-'o--. de- Ten-. I'M. /.< i.|u.-~. 



p. 424. Plato VIII. Figs. b,b, a. 



Eridophyttwn l\r/u //>'/<!// urn (Billings), ' /, New Sei-i--. \'ol. IV. p. 131, 



Fig. 



Corallum consist in-j; of cylindrical, straight or slightly flexuous corallites, from four to 

 MX lines in diameter, united by horizontal connecting pro< -Jared at intervals of from 



half an inch to an inch and a half apart. Septa about forty-five in number, alternately h 

 and small, extending very nearly to the centre of the corallite. and thu- invadm<_r the central 

 tabulate area. Septa connected in the outer zone of the corallite by nuniemu- div- j.iment-. 

 The distance between the different corallites of the colony varies much, bein- sometim< - half 

 an inch or more, whilst in other cases the corallites are nearly or quite in contact. 



/>-' l< ///// ////////( Verneuilanwn :.- readily 

 distinguished from i'.. \ . by the 



much -ri-ater size of the corallites, the 

 much _:( ttc'r remoteness of the coniurtinir 

 processes, and the greater developmont 

 7 and inward exten-imi of the septa. In- 

 i-e by parietal -emulation ran often 1 

 observed. The epitheea i- marked with 

 obscure annulationa of -rowth ami vertical 

 stria- eonv-pondinir witl the septa. 



In the oriirinal de-eription by Milne 

 Kdwards and 1 laime. the septa in this 

 Speciee are >-[\<( t .1 be only twenty t\vo in 

 number. A- p"intid ..ut l'\ Mr. Billi 

 however, this dep.-ml> uj.on their hav- 

 ing counted the primary septa only, the 

 total number of Septa 1'ein- thu- the -ame 

 as in ciur Canadian examj 

 Kum rrrneuUanum, (Edwuds and Haime) : a, Two / -,,/;/,,,,,,,//.'..,.,/;,.,, (',,1-111 l'er..n< 



Limestone of Ridgeway, common. A 



' mUtTous Limestone. ,- i>-"- ' , 



ace rding to Mr. Billings, m the Cornifer- 







ous Limestone of Port <''ilborne, Lot 1!', C\\. .'!. 



and near 



GK.M - < JT8T1 MM I.I.I'M ( Lim-d.' 



Corallum -iniple. turbinat-- or Oylindrioal, rarely ale. Interior uf the theea I: 



with \e-ieular ti--ue; (he .-.-], ta riidiinentary r ah- nl. 



Pive species of thii genus, vi/. : < . - . I'.illii i i: 



' . 1 Edwards) nd I laime >, and ' ' , j BilHogE . have I" n d< - 



^Ir. Mill!' nceeiirrin- in tin- l>e\nni:m p.i-k- of \\'e -tern ( >ir id "[ t; 



all but tin- la-t li.ive eonie under my i\\ iee :^ ,,eenriii'_' in tl'" ( '"rnilernu- Linie-toi, 



G Idfuss), al- ....... -ur- in the CornifeTOUB, and very ahundantly in the llaniiitn 



formation. 



:;i. c\ -TUMI vi. 1 1 M SIM i: 



Plata VI. l'i . :.j 



' ' Milliir.:- ' ' Seri.--, \'..l. I \ | ! ".7 



('oraliuni -ini|.l.-. oylindro-oonio, or oyHndrioal, elongai 1 riou-ly 



Ej itlieea thin, alm->.-! in\ ariahly ! < -rri 'M'd. ('iliee di-i-| th, nr tuberoulat 



