CL.1SSIF1CAT0ET POSITION OF SOME MADKEPOEAETA.. 141 



hrina, Ed. & H., is not a species of Confusastrcea. Isastra;a tenui- 

 striata, M'Coj', sp., confounded with some other form, but not 

 bj its author, is a true Isastrsean. Confusastrcea tenuistriata 

 Tomes, cannot remain in that genus ; for it has characters 

 which do not belong to it. Cliorisastrcea, De Prom., is not a good 

 genus. Thecosmilia gregaria and T. ohtusa are names which should 

 be retained, and the forms should be removed from Ohorisastrcea. 

 Heterogyra^ Reuss, is a good genus. Symphyllia Etlieridgei, nob., 

 belongs to the genus with which it is associated, and not to 

 Phyllogyra, Tomes. TJiecoseris is an epithecate Lejptophyllia ; and 

 T. jjolymorjjJia, Tomes, is quite distinct in its morphology from 

 Turbinoseris and Palcposens, nob. Cryptocoenia, d'Orb., is an 

 imperfectly distinguished genus, and is replaced by Cyathophora, 

 Ed. & H. Therefore Cy aiJiopliora tuberosa, nob., which has not a 

 close resemblance to C. luciensis, Ed. & H., and also C. Pratti, Ed. 

 & H., remain as good species of their genus. Cryptocoenia micro- 

 pliylla, Tomes, is a variety of Cyatliopliora tuberosa, nobis. Mont- 

 livaltia caryophyllata, Ed. & H., had not its septa wrongly described 

 by its authors. Eissiparity and gemmation were not confounded by 

 Milne-Edwards and J. Haime, or by myself. Thecosmilia Slatteri, 

 Tomes, is a variety of Claclophyllia Babeana, Ed. & H. The 

 figure given by me of Thamnastrcea Waltoni, Ed. & H., has been 

 misapprehended. 



IsastrcEa oblonga, Ed. &H., was correctly described by the authors, 

 and no addition to the knowledge of the form has been made. The 

 genus Isastrcm has its species budding within the calice and close 

 to the outer wall, never, as " stated, between the walls of calices. 

 Heliocoenia is a subgenus of Stylina, has not a lamellar columella, 

 and differs from Placocoenia, d'Orb. Isastrcea Conybeari, Ed. & H., 

 is a good species; it is not the same as Clausastrcea=Pl€rastrcea 

 Pratti, Ed. & H. The type specimen of Plerastroia Pratti, Ed. & H., 

 has a columella ; and the authors of the genus did not describe it 

 as having an essential columella. The genus Platastra^a does not 

 include these forms. Bathycoenia, Tomes : nothing was stated in 

 the worlc called a " Revision of the Genera of Madreporia " about the 

 similarity of the genus and Stylosmilia. This statement is difficult 

 of explanation. 



Every one of these numerous statements is made in opposition to 

 the opinions of Mr. Tomes. Proper acknowledgment is made 

 regarding the useful knowledge conveyed by Mr. Tomes about the 

 localities of corals and the zones in which some occur. 



The author of this communication agrees with Mr. Tomes on two 

 points : — Mr. Tomes has shown that, owing to the matrix of 

 Cyclolites Lycetti, nob., not being sufficiently removed, the form is 

 his Dimorphastrcea duhia, and that properly the generic term should 

 be Dimorpharcea. Again, Mr. Tomes has raised much doubt in my 

 mind where a species I had placed under the genus Lepidophyllia 

 should be placed ; probably it will have to come within Donacosmilia, 

 as stated by Mr. Tomes ; but Donacosmilia requires careful working 

 out. 



