150 THE HABITAT OF THE EURYPTEEIDA 



referred to as normal holds also in this case for Pterygotus, but there 

 aire many other occurrences for which no data are available. How- 

 ever, the rarity and the poorness of preservation of the fragments 

 which have been found make it a matter of no great importance 

 whether the eurypterids are intimately associated with the marine 

 forms or not. I shall here list the localities as given by Alth and 

 other workers in the same field. 



Eurypterus fischeri. 1. Eichwald reports this in a black, compact 

 limestone with corals from Kamieniec podolski, Podolia. 



2. Malewski reports it from the same limestone at Dumanow, 

 Zawale and Studzienica, Podolia (see Schmidt's remarks above, p. 

 148). 



3. Fragments reported by Wenjukow from Dumanov, Podolia. 



4. Siemiradzki reports this species from Zalucze on the Smotrycz 

 river, in a yellow marly limestone (263, 215). 



Pterygotus osiliensis. Exact locality and horizon not given for 

 Alth's specimens. 



Schmidt reports this species from transition beds of Zalesczyki, 

 Galicia. 



Siemiradzki has also recorded the finding of fragments which seem 

 to be similar to Alth's undetermined Pterygotus sp. in the olive green 

 shales from the same locality (263, 215). 



Stylonurus sp. Alth. 1. A tail spine from the plattenkalk of the 

 Borszczower beds from Zamuszyn (Alth Plate V, fig. 4). 



2. A tail spine from the light greenish-gray marls into which the 

 gray limestones of the Skalaer group pass upwards, found in the 

 region of the Zbrucz Valley opposite to Zajaczki and north of Husi- 

 atyn. (Alth Plate V, fig. 5). 



3. A tail spine from the thin limestones opposite Zamuszyn 

 (Alth Plate V, fig. 6). 



These occurrences in Galicia and Podolia follow the general rule 

 of being very fragmentary and isolated. From the literature one 

 cannot tell whether the eurypterids were actually found in the same 

 beds with the undoubted marine forms or not. 



Pterygotus sp. ind. Siemiradzki. Siemiradzki has reported the 

 occurrence of a telson of an undeterminable species of a Pterygotus 

 from the Devonic coral limestone of Skala, Galicia (263, 215). This 

 is mentioned here to complete the survey of the Austro-Russian 

 occurrences. 



