No. 3. — Reports on the Scientific Results of the Expedition to 

 the Eastern Tropical Pacific, in charge of Alexander Agassiz, 

 hy the U. S. Fish Commission Steamer " Albatross " from 

 October, 1904, to March, 1905, Lieut. Commander, L. M. 

 Garrett, U. S. N., Commanding. 



VI. 



Madreporaeia. By T. Wayland Vaughan.^ 



Mr. Alexander Agassiz has submitted to me for determination and 

 report the Madreporaria collected during the " Albatross " Expedition of 

 1904-1905. The collections are small, and represent only seven localities. 



Two species, PociUopora lacera Verrill and Astrangia haimei Verrill, 

 were obtained from Taboguilla Island, Bay of Panama, the former at a 

 depth from low tide to 1 fm., the latter between tides. 



Three species were obtained in the vicinity of the Galapagos 

 Islands, viz. : — 



Madrepora galapagensis, sp. nov., depth 300 f ms. 

 Desmophyllum galapagense^, sp. nov., depth 300 fms. 

 Balanophyllia galapagensis, sp. nov., depth 100 fms. 



One species, Bathyactis marenzelleri, sp. nov., was collected off Callao, 

 Peru, at a depth of 3,209 fms. The same species was obtained at Station 

 4721, about half Avay between the Galapagos and Garrett Ridge, at a 

 depth of 2,084 fms., and probably at Station 4732, southwest of Garrett 

 Ridge, at a depth of 2,012 fms. 



Two species, PociUopora diomedeae and Porites paschalensis, both new 

 species, were collected on the shore of Easter Island. 



Five species, a variation of PociUopora cespitosa Dana and four species 

 of Acropora, were obtained at Manga Reva. 



1 The Director of the U. S. Geological Survey has allowed me to prepare this 

 Report as part of my official work. 



* The name Desmophyllum galapagensis, on Plate 1 printed as originally pro- 

 posed, has been changed to the more correct D. galapagense. 

 VOL. L. — NO. 3 1 



