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PERCY SLADEN TRUST EXPEDITION 



modified into the II c type ; usually arranged in rows in the coils of the mesenterial 

 filaments ; (4) nematocysts III, when present, narrower and longer than in Favia. 



The polyps are polygonal, with no edge-zone. Both entoccslic and exocoelic tentacles 

 are present, their number not always equalling that of the entoccBles and exocceles, each 

 with a swollen terminal battery ; sub-terminal batteries present but number doubtful. 

 The stomodseum is comparatively narrower than in Favia. The subsidiary couples of 

 mesenteries vary considerably in their respective widths ; their number in a primary 

 exocoele also varies up to 5. The coils of the filaments are usually found protruded 

 through the oral-disc. Fission of polyps equal or sub-equal. 



The genus resembles Favia in many respects but the species studied form a homo- 

 geneous group. Until conclusive evidence is available for merging these genera, it is 

 advisable to keep them separate. 



Remarks. In the Berlin Museum there are two large specimens with irregular lobes, 

 referred to Scapliophyllia lohata, Stud., their corallites showing a pronounced meandering 

 facies. There is little doubt that these specimens belong to Goniastrea, the corallites on 

 the humps having thin septa and resembling those of G. pectinata (Ehrb.), while those 

 towards the edges are shallower with conspicuous paliform lobes simulating the condition 

 in G. planulata, Ed. and H. The irregular mode of growth of the corallum is, however, 

 a striking difference from both G. pectinata and G. planulata. I did not examine the 

 type-specimen of Scapophyllia cylindrica, Ed. and H., in the Paris Museum, not realising 

 at the time the probable relationship of that genus to Goniastrea. If, on examination of 

 polyps, the identity of the two genera should be established, Scapophyllia would, in 

 accordance with the claims of priority, have to replace Goniastrea. The three specimens 

 on which Quelch instituted his new species G. multilohata (figured specimen 13 cm. long 

 and 12 cm. high) resemble in every respect the Berlin examples of Scapliophyllia lohata, 

 Stud. ; the hillocks in these specimens sometimes end in ridges as in Favia ahdita (Ell. 

 and Sol.). 



The following is a list of specimens originally assigned to Goniastrea by various 

 authors but which really belong to Famia : 



