and form a series of about twelve strong ridires which run longitudinally in the interior of the 



corallites. These septal ridges are crossed by rudimentary Hh.ihe in the form of short spine- 



like lamellie, about three or four in the space of a line, and not placed on the same level in con- 



tiguous rid:_ r < -. It is possible that the.-'- form- are specifically distinct from those which I 



have hen referred to, /'. / lut I do not feel that it is safe to separate them at present. 



Locality and Formati . Corniferous Limestone, Port Colborne, and Lot <;, Cone --sion 



1, Wainfleet. 



50. FAVOSITES HEMISPIIERH-A (Vandell and Shumard). 

 (Plate VIII. Fig. 3.) 



isite&hemupherica (Yandell and Shumard), Contrib. to Geol. of Kentucky, p. 7. 

 Ali\"lit-.< li> //il.iji/i' i-ii-ii (D'Orbigny), Prodr. de Pal&rat, Vol. I., p. I'j. 

 Eiuiitnn.<i<t }fini.<i>h'-i-ica (Milne Edwards and Jule- Haime). Pol. Foss. des Terr. Pale >z. 

 p. 247 ; and Brit. Fossil Corals. Plate XLVIIL. fL- 11 



/' : >< iit^j'/" r'i'-'i (Billings) Canadian Journal, New Series, Vol. IV., p. 105, fi_-. 



>, , . 



In its essential characters this species is very closely allied to F. G<>tll'Ui<H>-'t. Externally. 

 however, it may in general be distinguished from the latter by the much smaller size of the 

 coraliites, which are usually only from one twenty-fourth to one twentieth of an inch in dia- 

 meter, though they sometimes reach one line, internally, the species is distinguished bv the 

 fact that the tabula arc incomplete, very thin and closely set, usually extending only about 

 halfway across the corallite, and often interlocked toward- it- centre. Some of the tabula 1 

 however, are usually complete. The mural pores are stated to be in one, two, or three row-, 

 (Milne Edwards and Haime, and Billings) but I have not -uccecded in .leteetin- their ar- 

 rangement in any of the Canadian examples which have come under my own notice Accord- 

 in _' to Milne Ivlwards and Haime, also, there are twelve well developed septa, but thc-c an 

 indeterminable in the Canadian -peeimen-. Thi- .-peric- may po--ihlv turn out. a- -u^-vsted 

 by Mr. liillinirs, to be identical with /'. Qothfandica, but it- di-tinetive character- can u-ually 

 be recojni- 1 with such ease a- to justify placing it under a separate specific title. Th 

 can be no hesitation, however, in following Mr. Billings in hi.- refusal to adopt the L:eiui- 

 Kinini<-iii, pmpnsrd by I dwanl- and Haime to receive this -peric-, and foundrd simply upon 

 tlie incomplete condition of the tabu! 



locality and /'///(///>/<. Common in the Corniferous Limestone of l;id'_ r rwav. Port 

 Colborne. and luany other localitic- in \Vc-tein Ontario. Also, in tlio Hamilton Formation 

 of Uosaniju 



:>1. I-'A\-(PSITKS TntiiiNAiA d'.illii^ 



(Plate VIII. FL-. 1 and L' 



L 



/''' ' ' fa (Billings), Canadian Journal, New S.-rie.-. \',,l. I\"..j.. 10:1. aml\ 



V., p. iT.s, fig. ; 



[( Corallum forming elongate tarbinate masses, sometimes two f.-.-t in len-th and 



inche- in diameter, often curved at the ba-e. ( 'orallit- - n.-arl v of an uniform -i/c. u-uallv 



-omewhat le-,- than a line in width . Iran \er-e diaphra-jin- thin. Hat, fle\iion-. complete or 



incoinplei.- (Inly one row of pores ha- been ob-.-rved. \\'h"le surface BZOepI lie- npp-r part 



d with a -tron-_r epidieca which clo-c- the month- of tin- cell- " ( Hillii, 



There can be nn .jiie-tion a- to tin- -p.-dlic distinctness ,,f thi- m-.-t remarkable -i 



the ino-t singular representative of the genus. The form of the col,,n\ \aric--mueli, but i- in 



typical -pecimen- that of a -trail-lit or curved cone, which \:irie- in l.-njth from !<-- than ..tie 

 inch up to two 1'e. -t. Other examples are more or le- cylindrical, eitl,. - hi like Ortlc- 



Ltitea, or more commonly rur\ed or twi-t.-d. and of irregular diaini-ter. ( Mln-r -p.-cim.-n-. 



-in are irregular curved n. -hieh look like lan-c pi.iato,-- 



In perfect; rved -pei-imen-. the whole of tli il.my. exc.-pt the upper -urtac. . i- 



r. -1 b\ a thinner or thicker epitheca, whid ,j, the c -lallite- ! 



-ummit of the colony i- u-ually -omewhat eiip-haped (thou-h thi- ma\ not b.' a natural 



ipp 1 onl\ here that the ooralliti an |--n. foaiost -|-cim. n-, du- epitheea 



