ME. H. M. BEEIfAED Olf EECENT POEITIDiE. 145 



any aBBnitj with. Forites. A second figure, however, is given, 

 evidently of another specimen, by Milne-Edwards and Haime 

 (Anu. d. Sci. Nat. 3 ser. ix. pi. v. fig. 2, 1848). This was first 

 named Goscinarcea Bottcd, M.-E. & H., but afterwards, being 

 identified with Savigny's figure, became Goscinarcea meandrina. 

 Dr. Klunzioger has fortunately re-discovered and photographed 

 ■it as Goscinarcea monile of Eorskal, and regards it as a Eungid *. 



The remaining subfamily of the Poritida?, M.-E. & H. — the 

 Montiporince — consisted of two genera, Montijjora and Psammo- 

 cora, Daua. 



Montipora. — This genus is one of those which Milne-Edwards 

 and Haime forced among the Poritidse solely on account of its 

 " trabecular " septa. I have already analysed the skeleton of 

 Montipora and compared it with that of JPoritesf. I was, how- 

 ever, all the while conscious of some misunderstanding ; the 

 confusion lay in the word " trabecula." I endeavoured to show 

 that the trabeculae of JPorites were not the same as the vertical 

 rods which form such a conspicuous element in most sections of 

 Montipora, the secondary development of which could be traced 

 within the genus. I am now, however, not satisfied that Milne- 

 Edwards and Haime meant these vertical rods at all. The word 

 " trabecula " must have meant for them both vertical and 

 horizontal rod-like skeletal processes ; and the trabeculae of 

 Montipora were, for them partly at least, the short blunt septal 

 teeth, and not exclusively the long nodulated rods which, in the 

 sections of some forms, so closely resemble the vertical rods in 

 sections of Porites. Their express words, in discussing the claims 

 of Montipora and Psammocora to be classed among the Poritidse, 

 are : " La structure trabiculaire de leur polypier et principale- 

 ment de leurs cloisons ne pent laisser aucun doute sur leurs 

 veritables affinites " %. Further, their description of the septal 

 apparatus of Alveopora as " trabecular " leaves little doubt that 

 in their use of the word they meant either vertical or horizontal 

 rod-like skeletal matter. 



It is not surprising, therefore, if the word " trabecula " (" pou- 

 trelle") has caused confusion, for this indefinite application of 



* ' Corallenthiere,' iii. 1879, p. 78. 



t Ann. & Mag. Nat. Hist. xx. 1897 ; cf. also Introd. vol. iii. Brit. Miis. Mad. 



\ Ann. Sci. Nat. 3 ser. xvi. p. 54 (1851). 



