228 bulletin: museum of comparative zoology. 



the Geological Society of Loudon the originals and types of Duncan.^ 

 The result of this study was somewhat as I anticipated, — all of Duncan's 

 identifications with European species are wrong. The Diploria crasso- 

 lamellosa (described in this paper as D. conferticostata) and Cyathoseris 

 haidingeri of Duncan are both new species. Later I have described the 

 former; the latter is still imdescribed. Mr. Hill has collected no 

 specimen of it in his travels, ajid I did not have time while in London 

 to study the species properly and have figures drawn. Duncan's 

 HeliastrcBa exsculpta is not only not the same as the Heliastrcea exsculpta 

 of Keuss, but does not belong to the same genus. It is a synonym 

 of Heliastrcea (= Multicolumnastrsea, gen. nov.) cyathiformis, Duncan. 

 This breaks down absolutely any comparison of the Jamaican corals 

 with those from the Gosau. It might be added that the Gosau is not 

 Lower Cretaceous, as Duncan states, but high in the Upper Cretaceous. 



Eocene, 

 Paracyathus sp. Stylocoenia emarciata, var. La- 



Stylophora contorta, Leymerie sp. marck sp. 



Stylophora contorta, var. nov. 



Duncan has published no descriptions or figures of these species, and 

 only very scanty notes. I made the following notes on the original 

 specimens in the collection of the Geological Society of London. 



Paracyathus sp., which Duncan compares with P. caryophyllus (La- 

 marck).^ The specimen is a fragment, so poorly preserved that one 

 cannot determine any essential characters. Locality, " Black Shales, 

 Grass Valley, Jamaica," according to label in collection of the Geological 

 Society; " Yallahs Valley," according to Duncan.^ 



Stylophora contorta, Leymerie sp. (Duncan). I could see no reason 

 for separating the specimens specifically from Stylophora ajffinis^ of 

 Duncan. The walls between the calices are usually not so thick. As 

 the surfiice ornamentation has been eroded, the specimens cannot be 

 accurately described. 



Styloccenia emarciata, Lamarck sp. (Duncan) from Port Maria. There 

 are thickenings at the corners of some calices, and there appear to be 



1 For this privilege I am indebted to Mr. William Rupert Jones, Librarian, and 

 Mr. L. L. Belinfante, Secretary of the Geological Society. Mr. C. Davies Sher- 

 born, who was cataloguing and labelling the types in the Society's collections, did 

 everything possible for me. 



2 Op. cit., p. 8. 



8 Op. cit., pp. 9, 13. 



4 Quart. Jour. Geol. Soc. London, 1863> Vol. XIX. p. 436, PI. XVI. Fig. 4. 



