64 Cincinnati Society of ITaiural History. 



Geuus SerpuUtes, Nicholson. L. serjmla, a little snake. 



51 Serpulites Jamesi, Nicholson. 



Genus Spirorhis, Swainson. L. spira, spire; orhis, a circle. 



52 Spirorbis Lovelandensis, James. 



53 Cincinnatiensis, Miller and Dj^er. 



Genus Tentaculites, Schlotheim. L, tentacula, feelers. 



54 Tentaculites Sterlingensis, Meek and Worthen. 



55 Richmondensis, S. A. Miller. 



56 tenuistriatus, Meek and Worthen. lu. tenuis, slender; stria, 



a ridge. 

 Note. — Prof. Nicholson and others regard Tentaculites as 

 TuMcolous Annelides, Avhile M. Barrande assigns this 

 genus to the Pteropoda. 



SUB-KINGDOM ANNULOIDA. 



Class EcniNODEKMATA. Gr. echinos, a hedgehog; det^ma, skin. 

 Order Crinoidea. Gr. l-rinon, a 111}^; eidos, form. 



Genus Glyptocrimis, Hall. Gr. yhqjtos, sculptured; krinon. 



57 Gljqjtocrinus decadactylus, Hall. Gr. deka, ten ; daktulos, a finger. 



58 Baeri, Meek. 



59 Dyeri, Meek. 



60 D^^eri, var sublevis, S. A. Miller. L. sub, somewhat; levis 



smooth. 



61 sub-globosus, Meek. L. sub, somewhat; globosus, spherical. 



62 O'Nealli, Hall. 



63 Parvus, Hall. L. jyarvus, little. 



64 Fornshelli, S. A. Miller. 



65 ShaflTeri, S. A. Miller. 



66 angularis, Miller and Dyer. L. angularis, angular. 



Genus Heterocrinus, Hall. Gr, heteros, irregular; krinon. 



67 Heterocrinus constrictus. Hall. L. constrictus, contracted. 



68 constrictus var. compactus, Meek. L. com^:)oc^Ms, compact. 



69 exilis, Hall. L. exilis, thin. 



70 exilis var. exiguus, Meek. L. exiguus, small, or slender. 



71 simi)lex, Hall. L. simplex.^ simple. 



72 simplex var. grandis, Meek, L. grandis, large. 



73 juvenis, Hall. Jj. juvenis, JO^xng. 



74 heterodactylus, Hall. Gr. heteros, irregular; daktulos, a 



lino-er. 



