680 



ECHINODERMA TA. 



[HOI.. — I'F.N. 



Holocystites adipatus, H. benedicti, II. 

 colletti, H. com- 

 modus, H. gorbvi, 

 II. indianensis, II. 

 madisonensu, H. 

 ornatissimus, H. 

 papulosus, II. par- 

 vulus, H. parvus, 

 II. sci t 11 1 us, H. 

 spangleii. 1 1, sub- 

 ovatus, 1 1, wvkofii. 

 s. A. Miller. L891, 

 Advance Sheets 

 17th Rep. Geo. 

 Sur. Intl., pp. i:i 

 to 18, Niagara < lr. 



ampins. 8. A. Miller. 1892, Advance Sheets 

 18th Rep. Geo. Bar. Ind., p. 8, Niagara 

 Gr. 

 HYDiiniMK i:ims pentagonus, Miller & Gar- 

 lev. 1890, Jour. Cin. Boc. Nat. Hist.. 

 vol. 13, [i. 17. and L0th Rep, Geo, Bur. 

 In.!., p. 389, Dp. Coal Meaa. 



KiG. 1237. — Holocystites 

 BQbovatus. Summit. 



I'iG. 1238.— HydrionocrinuB pentagonus. 



Hyptioi-riiitix typtU, Waehsinuth & Springer, 

 L892, Am. Geo., vol. 10, p. 138. Not 

 defined si. as to be recognized. 



h liTHvot rim s conoideua, Ringueberg, 1890, 

 Ann. N. Y. Acad. Sci., vol. 5, p. 806, 

 Niagara Gr. 



greenii, S. A. Miller, 1892, 18th Rep. Geo. 

 Sur. Ind., p. 52, Keokuk Gr. 



Idiocrinus etongatua and I. veniricomg, Wach- 

 smuth A: Springer, 1892, Am. Geo., vol. 

 10, p. 135. Not defined so as to be rec- 

 ognized. 



Lecanocrixis tennesseensis, S. A. Miller, 



1891, Advance Sheets 17th Rep. Geo. 

 Sur. Ind., p. 41, Niagara Gr. 



Mariacrixus aureatus, S. A. Miller, 1891, 

 Advance Sheets 17th Rep. Geo. Sur. 

 Ind., p. 34, Niagara Gr. 

 granulosus, S. A. Miller, 1891, Advance 

 Sheets 17th Rep. Geo. Sur. Ind., p. 36, 

 Niagara Gr. 



Melocrixus sequalis, S. A. Miller, 1892, Ad- 

 vance Sheets 18th Rep. Geo. Sur. Ind., 

 p. 48, Niagara Gr. 

 dblmgus, If. ^aroH*, Wachsmuth & Springer, 



1892, Am. Geo., vol. 10, p. 143. Not de- 

 fined so as to be recognized. 



Meloxites was preoccupied when Owen tN: 

 Norwood used it, and Meek & Worthen 

 proposed instead of it Melonechinus. 



Menocrixus has five basals, and does not 

 have any near affinity with Platycrinus, 

 nor belong to the same family. 



Missouricrixis, S. A. Miller, 1890, Bull. 

 No. 4, Geo. Sur. Mo., p. 31. [Ety. 



proper name; krinoi), lily.] Calyx ob- 

 conoidal or basin-shaped ; plates smooth 

 or granulous; basals 5, forming a small 

 cup ; no subradials ; no regular inter- 

 radials; primary radials 1x5, wider 

 than high, and separated from the 

 brachials by an external gaping suture ; 

 brachials axillary, except in the ray 



Fig. 12: Mi. Missouricrinus admonitua. 



opposite the azygous side ; arms re- 

 sembling those in Scaphiocrinus ; first 

 azygous interradial rests between two 

 primary radials ami truncates a basal 

 plate; column pentagonal. Type M. 

 admonitus, which was described at the 

 same time, from the Burlington Gr. 



Myelodactylis gorbyi, S. A. Miller, 1891, 

 Advance Sheets 17th Rep. Geo. Bur. 

 Ind., p. 72, Niagara Gr. 



Nii'teuocrinus has five basals. 



FlO. 12-10. — Onychaster asper. 



< >xyciiasteu asper, O. confragosus, 0. de- 

 missus, S. A. Miller, 1891, Advance 

 Sheets 17th Rep. Geo. Sur. Ind., p. 74, 

 Keokuk Gr. 



Oxychocrixus cantonensis, Miller & Gur- 

 ley, 1890, Desc. New Gen. and Spec. 

 Echinodermata, p. 41, and 16th Rep. 

 < ieo. Sur. Ind., p. 358, Keokuk Gr. 

 ulrichi, Miller & Gurley, 1890, Jour. 

 Cin. Soc. Nat. Hist., vol. 13, p. 17, and 

 16th Rep. Geo. Sur. Ind., p. 339, Keo- 

 kuk Gr. 



Fig. 1211.— Onychaster demissus. 



norwoodi, Meek & Worthen should In- 

 restored, as it is not a synonym for O. 

 exculptus. 



Ottawacrixus, p. 265, first line at top of 

 page read subradial instead of " basal." 



Pal.eocystites, p. 267, is described in Dec- 

 ade 3. 



Pextremites basilaris and P. broad head i 



