1108 NEW YORK STATE MUSEUM 



size. The body is proportionately broader and shorter than 

 that indicated by the sternite described above. In eurypterids 

 of the type of Eusarcus scorpionis Grote and Pitt (15) , 

 Carcinosoma newlini Olaypole (16), Echinogathus 

 clevelandi Walcott (4), Eurypterus punctatus 

 Salter. E. s c o r p i o d e s Woodward (8), E. scoticus 

 Laurie (17), etc., so far as material shows, the preabdomen is 

 obese, the second pair of endognathites is the longest, and 

 all four pairs with their spines are curved forward. In Sty- 

 lonurus and the related genus, Drepanopterus (17), the fourth 

 endognathites are without any elaborate development of spines, 

 and in the former are greatly elongated. In Slinionia the first 

 pair of endognathites is tactile, the succeeding three pairs are' 

 short, vary little in size and are all provided with small spines 

 at the distal ends of the joints. In the Pterygotus the four pairs 

 of endognathites are filiform, of nearly equal size and probably 

 in all cases, spineless. . 



It seems quite probable that, with more perfect material, 

 this form will be found to represent a new genus. 



References 



1 Whiteaves. Palaeozoic Fossils of Canada, v.3, pt 1. 1884 



2 Hall & Clarke. Palaeontology of New York, v.7. 1888 



3 Barrande. Systeme Silurien, v. 1, suppl. 1872 



4 Walcott. American Journal of Science, v.23. 1882 



5 Walcott. U. S. Geol. Sur. Bui. v. 10. 1899 



6 Beecher. American Journal of Science, v. 12. 1901 



7 Clarke. N. Y. State Paleontologist Report. 1901 



8 Woodward. Monograph of the British Fossil Crustacea of the Order Me- 



rostomata (Paleontographical Society. 1866-77) 



9 Laurie. Royal Soc. of Edinburgh, Trans, v.37, pt 2. 1893] 



10 Hall. Palaeontology of New York, v.3. 1859 



11 Huxley & Salter. Mem. of Geol. Sur. of the United Kingdom. Monog. 1» 



1859 



12 Schmidt. Mem. de l'Acad. Imp. des Sci. de St Petersbourg, v.31. 1883 



13 Holm. Mem. de l'Acad. Imp. des Sci. de St Petersbourg, 8e serie. 1896 



14 Pohlman. Buffalo Soc. of Nat. Sci. Bui. v. 4. 1875 



15 Grote & Pitt. Buffalo Soc. of Nat. Sci. Bui. v.3. 1875 



16 Claypole. American Geologist, Oct. 1890 



17 Laurie. Royal Soc. of Edinburgh. Trans, v.39, pt 3. 1899 



