AOAK. 



2 



Acanthotelson. See Appendix. 



Acanthotelson eveni. (Meek & Worthen, Illinois Report 



3,1868, p. 551; 

 Am. Jour. 

 Sci.,YoI46.) 

 CoUett's In- 

 diana, 1883, 

 page 176, 

 plate 38, figs. 

 4, back, nat- 

 ural size ; 5, 

 another, 

 crushed side- 

 wise; 6, front 

 legs and an- 

 teann^e en- 

 larged in dia- 

 gram; T, a 

 stylet en- 

 large d, — 

 found in the Illinois Coal 

 found in great abundance 



Ind. IE83 



Many such fragments have been 

 Measures, especially in the nodules 

 on Mazon creek. 



Acanthotelson incequalis. See Palseocaris typus. XIII, 



Acanthotelson stimpsoni. (Meek & Worthen, Illinois 



Report, Vol. 2, 1866, 

 page 601, pi. 32.) Col- 

 lett's Indiana of 1883, 

 page 176, fig. 4. Back 

 of small specimen, a 

 little enlarged ; fig. 5, 

 2inoi\ieii: ^enlarged three 

 times^ flattened side- 

 wise. Found in 

 Grundy county. 111. 

 Coal Measures, XIII 



