62 ZOOPHYTES. 
B. Moves or GrowTu. 
58. There are several ways in which the mode of growth affects 
the forms of zoophytes, depending on the two following considera- 
tions :—1l. The mode of connexion between the bud and parent; 
2. The mode of growth of the parent and its budding polyps. 
a. 59. The union between the bud and the parent may be simply 
basal: the young starts out from the sides of the parent and forms 
finally a prominent branch. Such is the case with the species here 
aaa 
Anthophyllum cespitosum, 
QJ \" 
rbuscula. 
i) 
Caryophyllia 
figured. In figure 24, the branches thus formed are all distinct ; but 
in figure 23, representing an Anthophyllum, the polyps are united 
below in a common base, which gradually increases, as the whole 
grows upward, and surrounds the lower part of the cells. 
60. In other instances, the bud and parent have a lateral connexion 
nearly or quite to their summits, as is illustrated in the Astréas, 
Porites, and the massive corals generally. When this connexion 
extends to the very summit, the polyps appear embedded throughout : 
but otherwise they are more or less prominent above the general sur- 
face; and when the prominent part of a polyp secretes lime, the 
corallum is covered with calicles, as in the Madrepore, Dendro- 
phyllie, Oculine, Gemmipore, and some Astree.* But if no cal- 
careous secretions take place in this part, as in the Porites and 
Goniopore (§ 46), the cells are immersed, as in the case of immersed 
polyps. The Goniopore, and many Porites, when alive and expanded, 
have the polyps standing prominent over the whole surface of the 
’ 
* See the figures 27, 28, 29, 31, and 34, as well as those of these genera in the Atlas. 
