Eclu 55 
CYSTIDEA, J1LAST0IDEA. IV, G, H. 
(G.)— fCYSTIDEA. 
JBsiocystites, n. g , with type A. prisons, Trenton Group, Mercer co., Ky.; 
Miller & Gurley (82) Bull. Illinois, Mus., No. 5, p. 13, n. sp. 
A gelacrinidco, a new genus found, not described ; Jaiin (48) p. 271. 
Agelacrinus legrandensis , Kinderhook Group, Le Grand, Iow/i (p. 15), 
A . pulashiensis, Kask.iskia Group, Pulaski co., Ky. (p. 16); Miller 
& Gurley (82) Bull. Illinois Mus , No. 5 : n. spp. 
Atelecystis ?, sp. indet , Bala Beds, Yorkshire ; Reynolds (96) p. 110. 
Belenuiocystites , n. g., with type B. wetherbyi, Trenton Group, Mercer 
co., Ky. ; Miller & Gurley (82) Bull. Illinois Mus., No. 5, p. 8, 
n. sp. 
Caryocrinus bulbulus , Wayne co., Tenn. (p. 11), and C. ellipticus , Osgood 
and St. Paul, Ind. (p. 10), Niagara Group; Miller & Gurley (82) 
Bull. Illinois Mus., No. 5 : n. spp. 
Ilolocystites gyrinus , Jefferson co., Ind. (p. 5), and II. splendens , Madison, 
Ind. (p. 7), Niagara Group ; Miller & Gurley (82) Bull. Illinois 
Mus., No. 5 : n. spp. 
Mimocystis viazzettii (? nom. nud.), Devonian, Sardinia; Lovisato (66) 
p. 134. 
Trochocyslis barratidei ; Miquel (83) p. 106. T. bohemicus ; Jaiin (48) 
p. 271. 
(H.) — fBLASTOIDEA. 
Pentremiles , ambulacra described ; Steinmann (113). 
f All extinct. 
