BUFFALO SOCIETY OF NATURAL SCIENCES 37 



PORTUGAL 



Permic. About a third of the way south from Porto to Lisbon 

 and about 40 km. in from the coast lies Bussaco, famous for its Carbo- 

 niferous rocks and the abundant flora therein. This region was 

 studied as long ago as 1850 by Carlos Ribeiro. Three years later a 

 symposium on the sections and fossils of Bussaco appeared in the 

 Quarterly Journal of the Geological Society of London, and then in 

 1890 Wenceslau de Lima made a very complete study of the region, 

 with the result that, after a careful identification of the flora, he was 

 able to show that certain of the beds are Permic in age, belonging to 

 the lower Rothliegende. During his investigations he found a single 

 small eurypterid, the cephalon, body segments and telson intact, 

 though all of the appendages are missing. The animal measures 

 32.5 mm. in length, has a large cephalon, a bulging body made up of 

 seven somites and a long tail formed by the last seven segments. 

 To this form he gave the name Eurypterus douvillei. Associated with 

 this eurypterid are the plants Walchia piniformis and Sphenophyllum 

 thoni. The beds in which these fossils are found are a series of shales, 

 sandstones and conglomerates from the abundance of which de Lima 

 argues that torrential conditions must have obtained at the end of the 

 Carbonic and beginning of the Permic (149, 151). A glance at 

 Koken's world map showing the relation of land to sea during the 

 Permic will show that Bussaco was in position to receive very heavy 

 torrential deposits, being near the coast of that time. 



SUMMARY TABLES 



All of the data of the foregoing pages are summarized in the fol- 

 lowing series of tables. Table I is designed to show quickly in what 

 horizons and country any species of eurypterid has been found. 

 Table II, summarizing Table I, gives at a glance the numbers of 

 species that are recorded from each horizon and from each country 

 and also from each period. Table III gives in greater detail the 

 localities in which remains have been found, but is particularly meant 

 to give an accurate description of the mode of occurrence of every 

 species, if the remains are fragmentary, to state how many fragments 

 have been found, and if perfect to record with equal care the numbers 

 found. Each table is complete in itself, but all three, on the other 

 hand, should be used together since each one supplements the others. 



