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89<br />

species is based on size of corallites and number of septal spines. The latter criterion is not always unequivocal,<br />

size and number of the spines change within one species.<br />

We have tried to separate the species on grounds of shape of corallum and size of corallites.<br />

Key to the species considered herein:<br />

A. Corallum globular, knob-like.<br />

I . Corallites 2 to 2.5 mm in diameter. Septal spines in two cycles . . . .... ...... .. . . . A. daedalea<br />

B. Corall um columnar, plate-like or lobate.<br />

2. Corallites polygonal, 1 to 1.5 mm in diameter. Septal spines in two cycles .. ... .. . A. verrilliana<br />

3. Corallites rounded, neighbouring walls often separated. Corallites 1.5 mm in diameter. Septal<br />

spines in two cycles, second cycle short. ... . . ... .. ..... . . . . ... ... . . . . .. .. .. A. ace/lata<br />

C. Corallum branchi ng.<br />

4 . Corallites 2.5 to 4 mm in diameter. Septal spines in two cycles . .. . ..... ... . ... A. mortenseni<br />

5. Corallites 1 to 2 mm in diameter. Septal spines in two cycles, second cycle short . . . . .. A. viridis<br />

Madrepora<br />

Porius<br />

Alveopora<br />

Alcyonella<br />

Porites<br />

daedalea<br />

daedalea<br />

daedalea<br />

sovignyi<br />

clavasia<br />

Alveopora daedalea (FORSKAL), 177 5<br />

(Pla[t! 21, Figs. 6 . 7)<br />

1775. FORSKAL. 133 (Type locality: Red Sea).<br />

1776, FORSKAL, 12 : pl. 37/ 8(1).<br />

1834, EHR ENBERG , 341.<br />

1860, MILNE EDWARDS (& HA1ME), 194.<br />

1879, KLUNZINGER 2,47:pl. 5/25,26.<br />

1906, Y. MARENZELLER, 67.<br />

1941, CROSSLAND, l2.<br />

1967, SCHEER, 4l0.<br />

1971, LOVA & SLOBODKIN , 124.<br />

1974, MERGNER & SCHUHMACHER, 264,<br />

1976, PILLAI & SCHEER, 53 : pI. 2211.<br />

1980, HEAD, 151 , 455 .<br />

1828, AUDOUIN (& SAVIGNV), Sl : pI. l /4 (1 - 12 ).<br />

1828, AUDOUL" (& SAVIGNV), 56: pI. 4/6 (1-3).<br />

We have seven specimens from Red Sea before us that display considerable skeletal variation. The<br />

growth form is esentially knob-like with diameters up to 60 mm, usually less. Corallites polygonal , 2 to<br />

2 .5 mm in diameter. Septal spines in two cycles, primaries larger than the secondaries, extending horizontally<br />

to the centre and often meeting and tangling in the deeper parts of the fossae.<br />

Material :<br />

Gulf of Suez:<br />

Gulf of Aqaba :<br />

orthern R. S.:<br />

Southern R. S.:<br />

J erus.<br />

T. Aviv<br />

T. Aviv<br />

HLM<br />

HLM<br />

SLR<br />

NS<br />

NS<br />

EC<br />

X2:<br />

1828 (Abu Zanima).<br />

8404,8447 (Ras Matarma); 8376 (Ras el Kanisa),<br />

1937 (Shurat el Manqata).<br />

170 (without locality).<br />

10- 16 (Sarso Isl.).<br />

Dis t rib uti 0 n: Red Sea; Mauritius; Maldives; East India; Samoa.<br />

Alvt!opora<br />

Alveopora verriliiana DANA, 1872<br />

(Pl ate 21. Fig. 8; Plate 22 . Figs. 1, 2)<br />

verrillia1lQ 1872. DANA, 77. with fig.<br />

1907. VAUGHAN. 217; pI. 91/3, 32_<br />

1925 , HOFFMEISTER, 81.<br />

1939, UMBCROVE. 59; pis. 5/4 ; 1812 . 3,<br />

dedalea 1846 . DANA 512 ; pI. 48/4 .<br />

The following are the details of the specimens studied: EC 304 is a compressed columnar growth with<br />

a total height of 70 mm and a uniform width of about 30 mm, Thickness 20 mm. CaraUites polygonal,

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