part 1* LIMESTONK OK TMK LKirKST Kits 11 1 UK COALriKLD. l')7 



CaNIMA cf. PATULA Miolu'liu. ( Fi- t ct IM. X, tii;. 0.) 



Dr. Vauirlian distinguislit'd two forms of this si»t*c'ies in the 

 Cmunid zoiH' of the Carl)oniferoiis succession in tlie Mendij) 

 rci^i, ,n.i Tlie two forms (lescrihe<l are resi)ectivelv witlelv se})tate aiul 

 closely sejttate, the former heinu: the moreeommon. In both case> 

 minor sei)ta are undeveloi^ed, but the major se])tii extend throui^h 

 the /one of vesicles to the wall. The specimens obtained from 

 Tieknall closely resemble C. paiiihi Michelin in most points, but 

 there is a distinct di-velopment of short minor sej^ta. Dr. Vaui^^haii 

 considere<l the Tieknall mutation as beiui,' a late derivative of a 



Fi},'. l.— ( aninia cf. patida MicJirlin. Xcfin-ftf size. 



[8p«M'imi-ii t'ldiii wlii.li tlif transverse section sliown in Tl. X. ti^. 0. 

 lias been cut.] 



widclv-septate jjatidid ('<nii iiin. The main features ot tliis lato 

 mutation are : 



The coml ra|)i<lly wiiU-ns. fn-inn-ntly attaining: a long^th of '. cn».. antl 

 the calyx iw very (hu'i). A hitriztmtal section iMit thrun^jh an aihilt 

 siKJcinien just below the calyx shows : - 



1. Tin* nuijnr septii contintu»us thron^j'h the wide vesicular zone. 



2. The thicki'ninjr of the major septa. 



' S. H. Reynolds A A. VauRhan. Fauna! .V; Lith<il(»gioal Sequence in th< 

 Carboniferous Limestone Series (Avonian) of Hurringrton Combe (Somerset) 

 Q. J. G. S. vol. livii (ll»ll) p. 375. 



Q. .1. (i. S. No. 290. K 



