1878. ] 39 (Rathbun. 
of the materials of the Mecurti fossiliferous beds and the Corniferous 
is very marked. The former is composed mostly of rather coarse 
sandstones, the latter of limestones. 
To complete the fauna of the Devonian of Pard there remains the 
large collection of Lamellibranchs and Trilobites from the Rios Me- 
eurti and Curud, made by the Geological Commission in 1876. This 
collection is very extensive and represents a large number of species, 
which are mostly of North American Devonian types. From a hasty 
examination of the Lamellibranchs it seems probable that many of 
the species are identical with New York State forms. Several of the 
species are of large size, but lam unable to give here the names of 
the genera represented. Among the Trilobites are species of Homa- 
lonotus, Phacops and other genera. It is likely that the study of the 
Trilobites and Lamellibranchs would help to establish more clearly the 
relations of the Pard Devonian to that of N. America. At Ereré 
there were discovered, besides the new Brachiopods, two new species 
of Lamellibranchs, in addition to those previously described (An- 
nals of the Lyceum of Natural History of New York, vol. x1, pp. 
110 to 127, 1875.) They are of very small size and belong to the 
genera Nucula and Leda. 
Tropidoleptus carinatus and Vitulina pustulosa were discovered by 
Mr. A. Agassiz in 1875 on the island of Coati, lake Titicaca, Bolivia, 
demonstrating the probable existence high up in the Andes of about, 
the same Devonian horizon as occurs in Para. 
or less alter the above conclusions. The difference in the character 
Notes ON THE CorAL REEFS OF THE ISLAND OF ITAPARICA, 
BaHIA, AND OF PARAHYBA DO Norte. By RicHarp Rarssun. 
. 
In the American Naturalist for July, 1876, I gave a short descrip- 
tion of the coral reef skirting the outer shore of the island of Itapa- 
rica, in the bay of Bahia, Brazil. From a further examination of 
the reef and a study of the specimens procured from it, E am, able to 
add a few items of interest to those previously given. I also, wish to 
call attention to the existence of another reef, similar to that of 
Itaparica, to the south or the entrance to the Rio Parahyba do Norte, 
It was explored by Mr. John Branner of the Geological Commis-~ 
sion. In shape and structure, as well as in the paucity of coral life 
upon it, this last agrees very closely with the Itaparica reef. It fol- 
lows the trend of the shore, at a short distance from it, and between 
