144 2'Iie A})l('ric<i II GcoJoillxl . March, 18{».i 
(if ji li-ilohilc. Tlic spi'ciiiii'ii ii'pri'Si'iils llir coinplrird sccdiMl sla.irc- 
where no iiilei-slil ial buds luive been cl('vcli)i)ed. X4. 
Ki<iii!K (. A corallum of FaroKiteufDrbcxi-AlVAi^h^'iX lo a ramose bry- 
Dzojiii. Tlie colony, whicli consists of cells of the second and tiiird S(,'- 
ries, is reciinibeiit ami no interstitial bntls have been developed. XL 
Fioi'HK 8. .\nother example u^ Fdid.iifcK forbrsi in which llie lour 
.secondary corallites and some of tin' tliird ,>;iMierat ion lia\c ap|)eared 
without any interstitial cells. Tlie oldrst cell of thi- third series is in 
this case e\idcnlly older than the younuest cell of the second and its 
position is l)et\vefn //^ jiiid li,^. Ix'ini;' prol)ably descloped from the for- 
mer. X4. 
Fku'HE *.>. Fiir<is!fixf(n-bixi. \ recumbent tlioiii;li detached colony, 
consisting' of cills of the tii-st. second, third and fourth ^(■neralions. No 
int(M'stitial buds ha\i' made iheir appearance. This feature appears to 
be cliaractoristic of the recumbent forms, whieii, in the parallelism of 
Hie corallites and the absence of interstitial cells. i)eai' a reseml>lance to 
colonies of the explanate lyi)e where these characteristics remain con- 
stant throujj;h life. X t. 
Fkjuke 10. A nearly recumbent colony of Fiirositrx furbrxi which 
had sirown attached to one valvt- of a Mcristind iiitidii. The four cells 
of the second .<reneration have been developed, tojjether with two or 
tliree interstitial corallites. Enlar^cil after Hall. 
Fkjukk 11. FdcoNitrsforlKxi. A Specimen in which appear an un- 
usually larjre number of interstitial l)uds. 'i'he numi)er of secondary 
celhs is normal. X4. 
Figure 12. .\n e\ami)le of Furoxifix f(>r/i<xi \\\ which the initial cell 
sind two of the secondary corallites are distinjiuishable. Manx intersti- 
tial cells are i)resenl. X4. 
FiGUHE 13. A younj:' colony of Fnroxitixfarbtxi \\\ which the arranize- 
ment of the corallites is irregular. X4. 
Figure 14. .\ i)athologic sf)pciinen of Faroxitcx furbixi. The walls 
are thickened and one of the cells closed by a»i operculum. X 1. 
Figure 15. Another example of the same, showinj;- cells of the first, 
second, and third generations, and one central interstitial cell. X4. 
Figure 16. A specimen of Fin-nxitix furbtxl w\\\i:\\ shows tlu' system- 
atic position of cells of the first, second, and third iieneral ions. X4. 
Figure 17. A specimen of Faroxiftx ftirbtxi which well illustrates 
the method of determining- the relative af^es of the constituent cells. 
The position of the corallites in tliis specimen is \ery symmi'trical. but 
more tlian the regular number of cells belonjring- to the third series 
have appeared. There are ik) interstitial cells. The corallum was 
erect and attached only at the base. Xl. 
Figure 18. Lateral \iew of the same. 
Figure 19. .\nother view of the same. Xl. 
Figure 20. .V corallum of FarKxitix forbix/ in which ap]iear cells of 
the Hrsl. second, third, and fourth <;-eneral ions, tou'ether wit h n laru'c 
number of irregularly disposed interstitial cells, 'i'he initial corallite 
still has a peri])heral position. X4. 
