CoraUuiii ni F. /<irh('si\ cdr orcl<lenf(iJi>;. — Girlij. 188 
constitutes the second step toward the completion of the ma- 
ture cor.'illum. These buds spring invariably from the dorsal 
or attached side, for, at this stage, the corallite has bent up- 
ward in its growth sutticientl}^ to allow budding on that side. 
The appearance of the buds is rarely simultaneous, but usu- 
ally successive, and a regular alternation seems to be the rule. 
Occasionally in a very robust individual, the interval between 
the appearance of the first and second buds was much re- 
duced. As a result h^ and />., appeared simultaneously, and 
a little later 1>^ and b ^. Each bud is connected with its pa- 
rent by a pore, and the connection is maintained and con- 
tinued upward by a row of pores. 
Stage III. — The next step in the growth of the corallum is 
the introduction of five new buds (c) in the peripheral spaces 
between those alread}'^ existing. 
Stagic IV. — During the fourth stage, ten buds {d) are given 
otf on the periphery between each of the older cells. 
Stage V. — This stage consists of nineteen buds situated ae 
before. At this point the original corallite is completely sur- 
rounded, while further growth takes place regularly along 
lines already indicated. 
The Inteustitial Cells. 
As interstitial buds can appear only Avhen divergence of the 
older corallites permits, the order of their appearance is sub- 
ject to great irregularity, but, in a general wa}^ they may be 
said to arise, like the peripheral buds, in the angles where the 
older corallites (in this case three in number) meet. The 
subjoined table gives the number of interstitial and peripher- 
al cells regularly produced at each stage : — 
Stiige. Peiipheral. Interstitial. Total I'eiiph. Total Intcist. Total of all. 
1 Tlic iniliiil c.'il. 1 
II 4 <» I •"' 
III :> :! !> 3 i:{ 
IV Ill H 1!) IT '•'>'> 
V !!» m :{s «•»*.» los 
The first set oF interstitial buds consists of three cells, and 
is nearly contfunporary witii the tliird series of peripheral 
buds, oiilv slightly preceding it. The central l)U(l of the three 
is often much older, a[)p'ariiig nearly siiiiiiltaiicously witli the 
second u'eneration. 
