416 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvi. 



unless it be a few of the Ostracoda which remain undetermined. The 

 lower 400 feet of the Salina formation are characterized by Ostracoda, 

 particuhirly the lowest 130 feet, or the cement beds, Avliere these small 

 crustaceans are often present in considerable numbers. Not a frag- 

 ment of Eurypterm has been secured here. 



The next 285 feet introduce a \ei'y meager fauna, u small 2frr!steUa 

 predominating- and becoming the common fossil in the higher beds. 

 Here also has been found a single plate of the fish l^ilmas'ijii^ liltnin- 

 cata. Just above, or about TOO feet above the base of the formation, 

 there is a well-marked, but thin, fossilif erous zone, having small BJiyn- 

 chonella ImneUata in abundance, a R?njnehosplra recalling li. (jlohom, 

 a small Meridella. OrthothcteSj new species; ILurclilmnhi, a small 

 Modiolojpds-Wk.^ bivalve, and, rarely, ToitacuJltes (jyrac<mthH.s. Above 

 this horizon for nearly 425 feet no fossils other than the small Mci'h- 

 telhi hive been found. Then a prolific fauna indicating the Manlius 

 formation rapidly makes its appearance. 



The Salina formation of Maryland is a continuous series of deposits, 

 and appears to be the equivalent not only of all the Salina and Water- 

 linie of New York, l)ut also includes the hiatus ])etween the Waterlime 

 beds with Euryj/tcrxs and the "Bull Head'' rock of western New 

 York correlated with the Manlius. In eastern New York the whole 

 of the Salina lies beneath the ""Corralline limestone"' of the Schoharie 

 section, yet some of the diagnostic fossils of this zone occur in Mary- 

 land at the base of the next, or Manlius, formation as here defined. 

 In New Jersey it appears that all of Weller's "Decker Ferry forma- 

 tion,"' from what he calls the "" Bossardville limestone," up to the 

 "Coralline limestone"' bed of his "Rhynchonella lamellata zone," 

 representing a thickness of 42 feet, includes the horizon either of our 

 bed ha of the Salina formation, or part of this zone and our 4;"' of the 

 Manlius. It seems hardly probable that all of Weller's Decker Ferry 

 is so young as the base of the Marjdand Manlius, for if it were one 

 would expect to find some of the cystids, especially Sp}uerocyxt!irs^ the 

 leading fossil of the lower Manlius. In any event this formation is 

 either transitional to or lies partly in our l)asal meml)er of the Man- 

 lius. This correlation is further supported by a study of a niuu))er 

 of sections extending from southern Pennsylvania into New Jersey, 

 and thence to the type locality of Schoharie, New York. These sec- 

 tions will be published elsewhere. 



The Salina of INIaryland is continuous with that of Pennsylvania, 

 where it attains a thickness of 1,600 feet in Perry County. Parts of it 

 have received various names, as Bloomsburg red shale, Bridgeport 

 sandstone (= Lower Salina), and Bloomfield or Landisburg sandstone 

 (= Middle Salina). In Pennsylvania, as in Maryland, the formation is 

 devoid of Euryj^terus (except at Selinsgrove Junction, where were 

 found a few thoracic segments), but it abounds in large Leperdltla 



