i'l.ATB XXI. 



FIG. 1. Tula a in I'liriiilnKit Kirkp. .sji. n. | nat. size, p. :->-'. 



FlG. la. Pore areas of same (x Id). 



FIG. 2. Ti'iliwiit fiiiiliiiaiii Kirkp., p. S3. 



FIGS. :'., k 4n. -1(1/1/111/1 rniliittiix Topsent. Nat. size, p. L'. .'iff. closed Kciilf. X -'. 



Fm. 4/. Open oscule of same (x 10). 



FIG. 4r. Pore ana of same ( X 1<>). 



FIGS. ;">, r>a. Li/ihmi. x/,ittnl</f.'iK Kirkp., nat. size, p. ^".). 



Fin. ;")/>. Oscule of same fully contracted, side view ( x Hi). 



FIG. oJ 1 . Oscule of same, front view (x 10). 



Fin. 5''. Pore area of same (x 10). 



FIR. G.Iophonflabelk-digitatus Kirkp. ^ nat. size. p. :-'<!. 



FIG. (!". 1 '.ni ndi of same, 1 nat. size. 



FIG. fi&.- Oscule (if same, uat. ^ize. 



Kn:. (',i-. 1'i.i-c :ir,'ii of sain" ( X d). 



