LITTLE SALINE LIMESTONE. 219 



The corals observed from this geological horizon are few, 

 and form a minor portion of the fauna. Only four species have 

 been identified, all from the lower beds. Of these two species 

 belong to new and undescribed forms: Zaphrentis cornuformis, 

 and Zaphrentis salinensis, and they seem to exhibit little resemb- 

 lance to any previously described lower Devonian forms. 



Thus far but a single well preserved Crinoid base has been 

 noticed, belonging to the genus Edriocrinus. 



Most of the bryozoans occur in the upper beds, and the 

 relative abundance of the fenestellids and fistuliporids point to 

 an early Devonian age for the fauna. Of the 11 species identified, 

 4 are present in the lower beds, and 8 in the upper, only one 

 species, Monotrypa tabulata, ranging through both horizons. 

 They have for the most part been replaced by lime carbonate, 

 and their condition of preservation is such that identification is 

 difficult and more or less uncertain. From a careful study of thin 

 sections it has been possible to identify at least six new species, 

 the others showing affinities with described forms occurring either 

 above or below the Oriskany. 



The brachiopods are chief among the classes represented, 

 and form a large portion of the fauna, 43 species have been 

 identified, which is approximately 43 per cent of the whole. Of 

 these, eleven species, or about twenty-five per cent belong to new 

 and hitherto undescribed species. Of the remainder, two do not 

 admit of certain determination, twenty-three occur in the 

 Oriskany of New York and Maryland, and the remainder occur 

 either above or below this horizon. 



The age of the fauna is suggested by the large size of the 

 brachiopods, although generally speaking, they do not attain so 

 large a size as do the New York examples. Rensselaeria ovoides 

 is considerably smaller, although many of the mature forms are 

 larger than Rensselaeria marylandica, which is the southern 

 representative of this species in Maryland. An exfoliated portion 

 of the pedicle valve of an exceptionally large Leptostrophia 

 magnifica has been observed, and many smaller examples. It is 

 particularly noticeable that the brachiopods are for the most 

 part represented by the separate valves only, and except in one 

 or two species entire specimens occur but rarely. Entire speci- 

 mens of Eatonia peculiar is are present in a splendid state of 

 preservation, and are common both in the lower and in the upper 

 beds. 



