128 MARINE BIOLOGY OF THE SUDANESE RED SEA. 
Known in the Red Sea from other Collections. 
i) F 5 ral | 
a | oS 
Bi) ah aos 
Bae elie lod ele ale 
Piglei\2\a@) 8 |slelelsis 
pep UP Sey Is! yer Bele bas ee aa) 
ep SS Sy lS a = olele|lsio 
SlalGHlsala |] & IOinis [ale 
(2) Membrantpora bellula, Hincks ...... + ae: + + Madagascar. 
(1) Micropora coriacea, Esper .........| sca] ae ae |) are i) Ae: |b cence ...|-+| Mauritius. 
(z) Thairopora mamillaris, Lamx....... 300 seo |} aoe || coo UA Veco} te | + 
(1) Microporella inupressa, Aud. ......-.- a Shad bata ete | 
(1) ms personata, Busk ...... vat seefeee te 1 oe | ee bee | =P lieee i} set Baltamciels 
ee Tahiti, 
Cribrilina radiata, Moll. ............ ao SP )ae ar | ae AF -|+!...|-+}-+]4 Singapore or 
| Philippines. | 
(1) # Gattye, Busk ............ sais heal ata feast 
Schizoporella Dutertrei, Aud. ...... |eee| tb] + | wef + | -|+ 
(4) - Leperei, Aud. ......... BAA a jee | 
(1) Schizotheca serratimargo, Hincks...|... |... | --- | +/+) ap -' +] Suez. 
(1) Lepralia Pallasiana, Moll. ......... sco | eae ae oe |) sea tl coeit ee seal had ae 
(3) »  guadrata, MacG. ......... ees he + |+ (1) ...)...)...| +) +] Tizard Reef. 
(4) 6 AerReahh, INGBN,  cooacecoseos Keen | + | | 
(1) Suittia ophidiana, Waters ......... boo Wace |liseo heat ae | }+ 
(1) Retepora fissilabris, Busk, MSS. . | | | 
(5) ts ? pretenuis, Hincks ...... Neel re seen Joco |) aF | 
(Bn gy CR pellemna; TED oeoeasdes les al gears ieee ae 
(5) a cellulosa, Hincks ......... | --- ap eee eee 3e 
Hloloporella pertusa, Sm. .......2..+- Boao ikado +A. W.colll. 
(1) British Museum. 
(2) This was taken from a sounding-line on a passenger ship in the Red Sea. There is 
the off-chance that it may have adhered to the line from other soundings. 
(3) Named robusta in Brit. Mus. (4) Audouin, ‘Description de Egypte.’ 
(5) Hincks, Ann. Mag. Nat. Hist. ser. 5, i. (1878) p. 856-364. 
should cause us to carefully examine other characters to make sure that our 
classification is correct. Unless the material is very limited or difficult to cut, 
the tentacles of many zoccia can be counted. 
In some cases, such as the Cyclostomata, most Ctenostomata and a few 
Cheilostomata, where the number of tentacles is small, namely 8-12, large 
pieces may be examined without finding any variation, whereas where there 
are more tentacles then there is a greater range; but even then there is one 
number which is far the most abundant, and from this there may be a 
variation of one or two on each side, but never a large range. I usually say 
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