9 Arachn. 
Systematic. — Trilobita — Eurypterida. 
2831 
Typliloproetus gen. n. Freeh ( Prodi - 
dae) p. 351, microdiscus Freeh sp. n. 
p. 401 Devon, Karnische Aplen, 
Richter Frankfurt a. M. Abh. Senck- 
enb. Ges. 31. 
Wanner ia occidens sp. n. p. 314 fig. 
Alberta, Cambrian, Walcott Smith- 
sonian Inst. Misc. Collect 57. 
W eymouthia gen. n, ( Eodiscidae ) 
type Agnostus nobilis Ford, Raymond 
Ottawa Nat. 27 p. 103. 
XIPHOSURA, Etc. 
Limulus chitin in alim. canal, Wes- 
ter Zool. Jahrb. Syst. 35 p. 637 : 
Helder Tijdschr. Ned. Dierk. Ver. (Ser. 
2) 12 pp. 222-224. 
fEURYPTERIDA. 
Affinities, Woodward Geol. Mag. 10 
1913 p. 293. 
