103 



space, which has its internal wall formed by the innermost membrane ami it.- external 

 wall by an intermediate layer composed of the laterally-ooalesoent bra- ils are 



situated upon the internal face of the outer layer of thi- central apt tl inter] 



diate layer) ; and the two layer- an; kept apart by a -y-tem of pillars wliieh are attaehe-1 by 

 their inner ends to the internal layer ami by their .niter end- to tin- intermediate layer. Tl. 

 pillars traverse the eentral -pace perpendicularly, and correspond with the feoestmlee "fa 



'I'll.- water nm.-t have been admitted tn the central .-pace, and thu.- to :: by 



opening'- in the- tree edge "f the infandibnliform pnly/nary. but none of our -peeimcn- exhibit 

 this pnrtinn of the fmnd. 



In tlie -en u- // . Phillips), the fenestmles do not peri'm-at.- iL.- I'm: ito 



reach the outer face of the pnly/nary. but are tilled up by a eal.-itied menibrane. Tl.. 

 however, open upon the external surfaee. i.i-tead nf into a eeniral >pacr. and tin- ,-truetur- 

 the coena-cium i- in uther iv-peet.- very ditTerent. 



The following i- the only .-peeies <>f the uenu- wliieh 1 1 with - 



1 I'll. I'RYTOPuKA Mill. \KIUS (Nichnl.-n: 



N ._ \ "f Nat. HIM . l-'eb. 1-71. 



Polyzoary infandibuliform, apparently from one t.. three im-he.- in height. !'. -..i.rnal 

 layer, thin, impeiforate, Smooth, <T nh-euivly >triated. Intermediate layer torn the 



'.ranch.'-, marked by Vertical or suk-i, whieh U 1 about half a line 



apart, and .-nmetime- bifurcate. 15. sid< - ;he-e grooves, the niit-ide ..f the intermediate la. 

 i- marked bv inn-culatin'_r line-, whieh map nut -mall oval or polygonal space- corresponding 

 with th atli. The inner .-urfaee of the intermediate la\er carries the eel!.-, which 



are arranged hi-eriallv in fleximu- lines, and eneln-c ova! nr rhomboidal interspaces, Tli 

 interspaee- are di-pn-. d in verv regular diagonal line.-. ab..m tour in the space of two lii 

 and tin .ri'^in tn a Beiiefi of -hm-t rounded pillar- whieh extend inward- at ri-lit an. 



to meet the internal layer. Central -pace in which the eel!- are situ:;' ;it half a line 



to tWO-thirds of a line in depth. Internal layer thin and membranous. The entire frond 

 spring- from an exeeedin-ly strong, hori/oiital. branched .-talk, the -urtaee ,,!' which i- mar 

 by vermicular -tri;e. 



The material- in my hand- are not sufficient to permit of an entirely full elueidatimi and 

 illu-tration of the ohai <nd -trueture of thi- remarkable peeie-. l>i(]cient -p.-eim. 



however, or dillerent part- of the -ainc -[.< cimeii. -how the following api . . !';_ : 



1. Tl.e eM.-rnal ni'-mhrane i- \ery thin, and i- only preserved in part in an\ -pe -iiii'-n 

 that I have seen. It corresponds with tin reverse or non p.-rifemu- la\er of an . rdi: 



nid in reality i- tn 1,.- regarded a- nothiiu m-re than the exteri-r pnrtinii of the in- 

 ti-rm-'-iiate ,,r rellulit'.Tou- layer. N'nthinj. in fact, i- enmv.miier than to m< ,-t with p' 



-imilar specimens of j in whieh the has been stripped off. and the h 



the cell- are tlm- exposed to view. 



L'. The intermediate layer (together with the external layer, ai marked 



ned b\ the OOaleSCI lice of the braiiehe-. \Vh. II \iewed frolll the nlll-ide | KlL'. I". I 



evhibit- -hallow vertical grOOV< - marking nut the m-i-inal braneli.-. and it a!-., -h. 



Hie nf the fell- li. ', 



:;. Tlie -truetnre ,,f the interim- of the intermediate layer, and ( tli-- central Sf 

 whifh it tnrm- the outer bmind ,r\ , cm |., -m died in -peeimeii< \\ hich .\hibr t!..- ini 



face of the fnnnel, or in those \\iiichh, bmk.n aorosi trtnsvi 



which -h'.wthe in ,nd from which the inmrm..-t layer ba- b, en removed in \\ i 



in ; . unded i nn the inn. -i 



intermediate |ay< r l'i_'. |n /', Tl '!> 



bent nr undulating \\u> -. which > nd \\ilh tin- inner \ , 



, -nd \\iih ll R ^ 



Innk. 1. eimen uhlch I 



perforations between the inoscul ' I which run 



perpendicularly ii, -m ;L .nd liave their iir 



i thin ill membrane, which form- ti 



'I - thn i'"i m' d 



.d to which waic , HIM i 1, , . 

 the funnel. 



