THE SERTULARIDJ3. 151 



Fie;. 11. Aliii'liniiriii i-iisliilii. Four hydrotliec.-e liniicli enlaorcn'). 



11'. .\liii-limn-iiii-iislnlii. ( ironp nf f.'. inaiiL'ia I enlarged i . 



1.'!. .[liifiiiiiii-iir muni/Hill i Kirchenpaner). Pait of main stem and branches (enlarged). 



14. .lliii'liiuiriii inniiiliilii. Part of branch (enlarged). 



15. .lliii'liniii-iii iiiniii/iilii. Side view cif three hydrotbec.-r i enlarged I. 



Pi. ATI: XXX VI I. 



Fid. 1. .\liirlhiiirin liiri/ii/n (('lark). Part of stem and liram-li i enlarged ). 



1". .\liii-limii-in liirijiilii. ( iniiaiiu'iiiiii (enlarged). 



.'!. Abieli-naria (figanlea i Clark). Part nf lirancli (enlarged). 



4. Abietinaria i/ii/mili-ii. Side view nf branch with i. r 'inaii'_'ia (enlarged), 



"i. .\liii1iiinriii ii'i'i'iiil'-n. Side view nf Iliree liydn>thce.-c i enlaived I. 



I'l \TK XXXVIII. 



Fin. 1. Hydrattmaniafalcala(UmiiK\iB). Bide view of branch (greatly enlarged). 



'_'. ffydrallmania falcata. Gonangium (enlarged). 



:>. Ili/ilrnl/iiiiiiiiii J'li/rnlit. Frmit vii'W <>f end nf branch (i-nlar^'i'd i. 



4. Hydrallmania falcata. Side view of eml nf liranch i enlar^e<l). 



Ti. Ili/ilriil/iiniiiin ilixlini.t Xnttini.'. Part nf hraiich, side view ( enlarged I. 



(1. Hydrallmania dixtans. Front vie\\ nf branch (enlarged). 

 7,s. Ifi/ilntl/muiii'i ilixiuiix. Front view of hydrothecK (milch enlarged). 



!i. Tfydrallmania distans. < imian^iuni (cnlaiverl ). 



10. Ili/ili-ii/ltiiiiiiiii J'l-inii-iti-iiiiti (Trask). Part ofi'nlniiy ( cnlarj;ed). I After Trawk. ) 



11. Selaginopgif mirabilis (N'errill). Part nf branch icnlarijcd !. 

 r_'. ,sv/((f//i;nywi's mi riiiiilia. Gonangium (enlarged). 



13. Selaginapsis pinaxter ( Lcpci-hin i. Part of branch i cnlaru'cd i. (After Kirehcnpaner. ) 



PI.ATI: XXXIX. 



Fir;. 1. ,S'i/fi(/i/ in/ifi:, ti-iu'i-iii/i.i Mere^c-hki>\\sky. Part of branch (enlar<;ed). 



2. iS(7i(//i';i/ixi.s trisi'riitlis. I!asal ]iart nf branch i enlarged) . 



.'!. Selar/inopsis plumiformts Nutting. Part nf main ^tem, branch and branchiate, showing manner of bram-h- 



inj; (rnlarj,'cd I. 



1. ^/iii/iiin/ixiit nl,,tii/,'l,i ( l,e[iechin ). Part of hranrli (enlarL'ed ). 



5. Selaginopsis obsoleta. Cross section of branch (enlarged). 



fi. Selaginopsis pinnaia Mereschkowsky. Part of branch (enlarged). 



7. X /niiiiiiijixix ri/liiiili-ii-ii (Clark I. Part of brancli (fiilarjreil ). 



s. .^/iii/um/ixiK i'1/liinli-ii-n. SiiiL'le byilrotheca ('.'really enlarired i. 



PI.VTI: XI.. 



Fin. 1. Selaginopsis ornata Nutting. Part of stem, showing canaliculated coenosarc (enlarm'il). 



2. Miii/iim/mix ni-iiiiln. Part of branch (enlarged). 



.">. N7n;//ii//'.s' Hi-mil, i. ( innaii'_'iiim (cnlap.'i'cl). 



4. Xi-lm/iiiniixis nlixn/,l,i I Le| iccliin) . Part of branch (enlarged). I After Kirehenpauer.) 

 fi. ,^i-/ii;/im>i>xi.i ,1/li-riiillii-i-n I I.evinsen). !' rout view of part of branch I enlarged ). 



ii. Selaginopsia alterntiheca. Side view of pan of brand, i eular_'i'd). 



7. Selaginopsis alternitheca. Gonangium (ciilar_'<'di. 



5. ,sWrii/i'mi/iWs Iiin-l/iinlii Nnttiiif.'. Part of branch (enlarged ). 



PI.ATI: XL I. 



Fin. i. Synthecium tubithecum (Allman). Part of colony, showing opposite branches (enlarged). 



1". Siiiilliii-iinii i-i-i-lniii Xiittinj;. I "art of colony (enlarged). 



.",. .'Xi/ii/ln-riiim iminjimilinii (Allman). Part .if branrb ienlari;ril). ( After Alhnan.) 



4. Siinllin-'niiii i-nlmxlniii Nutting. Part of colony with u'onan.u'ia (loss cnlarucil I. 



"i. Xiiiitlii-riinii riiliiixlum. Part of branch, front view (eiilai-u'ed ). 



(i. Xi/iil!iii'iiiiti i-ii/'ii.-ilinii. Part of branch, side view i enlarged). 



7. Siinllii;-iiiiii i-i/liiiilririnii (P.alcM. Part of branch (enlarged ). I Afli-r I'.ale. i 



