156 P.N. WYSE JACKSON 
Fig. 84 Measurements taken on cystoporates in this study; a, Fistulipora incrustans (Phillips, 1836); b, Sulcoretepora parallela (Phillips, 1836); ¢, 
Goniocladia cellulifera (Etheridge, 1873b); ZT = Zoarial thickness from basal wall to upper zoarial surface; BW1 = Branch width measured parallel to | 
median wall: BW2 = Branch width measured perpendicular to median wall; MS = Distance between adjacent monticule measured from centre to centre; 
V1 = Number of vesicles contained along a 1mm line; FL = Fenestrule length; FW = Fenestrule width; AD1 = Autozooecia apertural diameter measured) 
parallel to growth direction; AD2 = Autozooecia apertural diameter measured perpendicular to growth direction; AS = Autozooecia apertural spacing: 
minimum distance between two adjacent autozooecial apertures, measured from their centres; LAD = Autozooecia apertural length measured from 
lunaria to opposite side; TAD = Autozooecia apertural width measured perpendicular to LAD; LID = Autozooecia apertural spacing in same longitudinal 
row: TID = Autozooecia apertural spacing between adjacent rows; Z1 = Number of complete autozooecial apertures contained in 1 mm?; Z2 = Number | 
of complete autozooecial apertures contained in a 2mm line; LW = Lunarium width; LT = Lunarium thickness; LD = Lunarium depth; V2 = Number of _ 
vesicles seen in transverse section contained along a Imm line; D1 = Number of diaphragms contained within 1mm. 
large hood- or cowl-like lunaria are developed. These are 0.1 mm interzooecial vesicular tissue, and by the regular monticular a 
high and cover approximately half the aperture. They are similar to rangement. 
those illustrated by Warner & Cuffey (1973) in F. incrustans Moore 
and F: carbonaria. Table 28 Measurements of Fistulipora incrustans (in mm). N=15. 
Monticules are regularly arranged between 2 and Smm apart and 
are conspicuously elevated above the general surface of zoaria. 
Small maculae (sensu Anstey 1981) are found at the apex of each ZT 4] 0.67 0.20 1.58 18.10 1 
monticule. Autozooecia develop in intersecting semi-circular rows AD 119 0.27 0.18 0.40 10.73 6 
away from monticules. LAD 20 0.24 0.20 0.32 10.10 1Lg 
Vesicles are arranged in 3 to 4 vertical stacks between autozooecia, we av Jay wad sale Us if 
with 5-8 contained within 1mm per stack. They are small, rectangu- BS ae oes Gao i. 2 z 
. ‘ ; : i LID 20 0.41 0.22 0.66 22.42 2 
lar, polygonal or inverted cup-like structures. They become TID 20 0.27 0.20 0.45 14.59 4 
increasingly thinner towards the zoarial surface. Between ten and Zl il 35 D) 6 16.88 6 
fifteen vescicles are found in each vertical stack. Z2 109 3.9 3 6 MAS 7 
In some large colonies five to six encrusting cycleshave beenseen ——-V! 16 4.6 3 6 16.04 5: 
(this is not unusual — many more such multilaminate sheets have V2 ZY Sif 2 : 16.60 7 
been observed in massive colonies from other localities) ws 8 zh eee cae ee : 
i re : e4 LW 18 0.20 0.17 0.23 7.84 20. 
. . * : : : : LD 12 0.01 30.0 10.02 29.25 3 
DISCUSSION. Fistulipora incrustans is easily recognised by its LT 12 0.03 0.02 0.07 3312 3 
encrusting habit, its large circular autozooecial apertures, its stacked exe ewe ee 
