53 



corallite is free for a certain space, and is not overlapped by the corallitc below, whereas in 

 Favositfft the walls of the corallites are contiL f uus throughout, ami air imwheiv free. I hav. 

 dedicated the species to my distinguished colleague, Professor E. J. Chapman. 



I.';i/iti/ >ui'i /''"iniiifio/i. Not uncommon in the < 'ornifcmus Limeetone of Port Col- 

 borne, and Lot >, Con. 1, Wainfi 



Qenvs AI.VEOLITES ( Lamarck i. 



Corallum dendroid, massive, or encrusting ; composed of short, prismatic or cvlindr; 

 corallites, with inseparably united walls, often arranged in superimposed concentric lay-r- 

 Tabnlse complete. Mural pores few in number. Calices oblique t" tin' surface, -ub-trian'_ r u- 

 lar or creseentic, the 1'iwer lip nm.-t prominent. Septa ab-ent. or represented by i'n>m one t.. 

 three vertical toothlike projections. 



The irenus .-llr, ni;t>* \- very nearly allied to /'</'<//<>, but is distinguished by the mui.-h 

 greater shortness of the corallites, the common presence of one or more toofchlike ri<l_ r ' - r^pre- 

 senting the septa, and the oblique caliee with its Bub-triangular, crcscentic, or semi-circular 

 aperture and prominent lower lip. In the obliquity of the caliee, however, Favo*tif& C/">j>- 

 mani closely approaches .I//- From Clmt'ti:^ and N/. /,.//,/./, a'_ r ain, tin- uenus A 



is distinguished by the |>" i" n of mural pores, and, as a -rneral rule, by the much 

 thickness df the walls of the corallites. As in the -en us /'./--,,*//, > the speeic- nf Air, , 

 may be divided into massive and ramose forms; but some of the former are truly encrusting. 

 and -imply become massive by the superposition with advancing a^e of >ucc-->Mve conccutri. 

 layers of corallit- - 



Mr. Billintrs records two >pecie.- of ^l/i;',,'/f, .- as occuring in the Corniferous Limestone 

 of Western Ontario, and four species from the Hamilton formation of'the >ame re-ion. All 

 of these excejit A. squamosa, have come under my notice, and two of the Hamilton >peei. <. 

 (viz. ./. Hniinri. and ./. /'/-./,, //.") I have also detected in the Cm-mien. us. I have likewie 

 to add tive species from the Cornit'emn- Limestune, which appear to be altogether new, to- 

 gether with a .-in_'le undescribed form from the Hamilton grouji. 



."7. Ai.vKMi.iTKs i..\r:i()s.\ 



' liillini:.-). Canadian Journal^ New S< Tie-, Vol. IV. p. 111. Fi_-. 1 1, l.'i 



Corallum ramose, or sometimes sub-palmate, the BtemB evlindrical or -ul> evlindri 

 brancbini: at intervals of from a ijuartcr of an inch to hall' an inch, generally at angles nl'tr'.iii 

 6<i' tn 7')'', but not aiia-tnm.iMn- or InrniiiiL' network l>iameter of the >tem> frmu a liti 6 

 over aline to two lines. Corallites oblique, oval or sub-triangular, with a pnijertin^ Inwer lip. 



( 'alicc> transversely oval, or triangular when umn. with the ape\ of the trian_ r !e directed 

 downwards. Calie,-- distant fmm mie aimtlicr I'rom a third to half a line measured v'i'ti 

 Oally, and from a Imirtli of a line to a third of a line me/i-m-ed dia-onally nrtran-. 

 - -' diameter of thd oalices, when unworn, about a fourth or a tilth ufa line. 



Seeticill- nf this .-Jiecies present a i 

 rc'-emliles to . llrmlil,^ ; r t ; lilii'ii M ' 



^1 1 Ql ridwanU ami I laime, liriti-h 

 l-'n il I 'nrals, I'latc IS. |-'i-. .'). but t|,e 

 branching take- place at ni"re acut-' :oi 

 in the pp'-ent I'-irm. no interlacin- nf the 



-t< in- M in- tn neciir, and the cnralii 1 

 th..ii-li -omewhat eni'ved. ar- 1 ti"t (! MLHI-. 

 In niie v.,.,-iu,,.|| u hi, -I, in iv perh.ip- ': a 



1 



variety nf .1 . .' < ' ' , the inter!.. r .'I' 



i-nralliti- i-Tliii.it- MM tli-- upp<-r wall. 'Hi nil, 

 i.\ a MiiL-le -tn.iiL' -'-pt.ii ri'l/e. di\ idin- th.- 



All lr..iu 



\erticalK lilt" t\M' ennilllUIIie.l! 



oompartmenu 



/ Ahiind-mi every where in the Cnrnifernti-- liiiK-t..ne nf \\ . 



