r>;it.'|>o>a ail 1 i's^ Allitg. 91 



while ill tlio I.irjjrr olilcr zorroia tlic a|)f'i(iin' has a nearly 

 straiglii proximal border, below wiiieli tliere is soiiietinies a 

 Inr^c avieularian eliaiuber. It is, liouevcr, as a rule, very 

 (lillieult to see the uliape ot tlu; oral aperture, so that, 

 alllioiij;li outlined by the eainera lueiil.i, the resturation of 

 some of the aperlures has been neecs.sary. 



This is vciv elosely allied to (J. jii/iu/im, Lonsdale*', and 

 he, btuliezka f, Heusa i, Vine §, and Un-^^oiy 1|, all show 

 the central /(xeeia the Miwdler, and speak ut the zooccia 

 radiating; rroin the eentre of the /o<iiiuin ; aho the text and 

 tif^ure.s iiidii-iite tint .it is deprcsscti, which is not the ease in 

 the N'irth Jtiilian lossils. nor is it always so in the speeiinen.s 

 ot /jW/o/m* which I have examined. Various authors have 

 rclcircd lo an o\ici!l in (). /.f/in'i/ft. but it is sjiokcn of as 



Q 



C 

 h 



( r'jituli] ma e.i re ifr:(>\ - 



n. X 1-. /'. LoD^fitudinal section. X 1-. 



r. Trnn«vi'r.-'e section near base, x 2'>. 



]troximal to the oral aperture, whrrras it is distal and 

 directed towards the centre of the disk, Tn my sp( einuns 

 of txrenlriia no ovicclls are distinguished, though some 

 zocrcia have a larpe snboral avienlarium. 



Horizontal sections of ^jr/wZ/'/crt are extremely intpre>tinnr, 

 as the^f show the jiriinaiy very near to tie stalk, rclcrred to 

 as the pit in Sj//icerojjfiora, But lora, and Sticf:o/iorina. The 



• l)ixon'fl 'G«'<.li.;ry of Sugeex," p. lol, j.I. i. fi;r. 10 (I8.'>0). 



t Olig. Hrv. von Lntdorf, p. 01, j.l. ill. Ii:r. 6 ( IhW). 



t Hry. (i. (l.Mit.s«hen Unteroli^r. p. 1'17, nl. i. fijfs. I, 2 (ISO"). 



§ Vino, ''Notes on lirit. Knc. I'oh.,' I'roc. York. (Jool. IVlytfcli. 

 Soc. vol. xi p. KM, pi. V. H^. 10 ( l>^Mi). 



II "On tli« r.rit. ralieog'. Hry.,'* Tnina. Zool. Soc. Loud. vul. xiii. pt. vi. 

 p. •j:>:\, pi. xxxi. tig. 12 (lHy3). 



