CRINOIDEA. (IV, F.) 
Echin. 101 
— A. pettisensis , Burlington Group, Sedalia, Mo.; Miller & Gurley 
( 234) Bull. Illinois Mus. x, p. 6, pi. i. — A. porteri , Pilton Beds, Devon- 
shire; Whidborne (342) P. Geol. Ass. iiv, p. 377, no fig. — A. 
sampsoni, Burlington Group, Sedalia, Mo. ; Miller & Gurley (234) Bull. 
Illinois Mus. x, p. 5, pi. i. — A. senectus, Chouteau limestone, Sedalia, 
Mo. ; Miller & Gurley (235) Bull. Illinois Mus. xii, p. 36, pi. ii.— 
A. sobrinus, Burlington Group, Burlington, la. ; Miller & Gurley 
( 234) Bull. Illinois Mus. x, p. 10, pi. iii. — A. speetabilis, ibid . ; op. cit. 
p. 9, pi. iii. — A. subpulchellus , ibid . ; op. cit. p. 13, pi. iii. — A. sub- 
scitulus , ibid . ; op. cit. p. 12, pi. iii. — A. tuberculosus, Upper Burlington 
Limest., Burlington and Pleasant Grove, la. ; Wachsmuth & Springer 
( 336) p. 573, pi. Iii : n spp. 
Actinoidea C. F. Iloem. ; Wachsmuth & Springer (336) p. 16. 
Actinometra pulchdla , in B. of Biscay, variation in position of 1st syzygy, 
and of others ; Koehler (163) p. 477, & (164) p. 99. 
\Adelocrinus hystrix ; Whidborne (342) p. 377. 
t Agaricocrinus, rediagnosed (p. 486), radial dome plates (p. 104); Wachs- 
muth & Springer (336) : geological history of N. American spp. ; 
Miller & Gurley (235) Bull. Illinois Mus. xii, p. 9. — A. americanus , 
with var. tuberosus, redescr., inch A. dissimilis S. A. Miller (p. 488, 
pis. xl, xlii); A. bellatrema ( — ornatrema), redescr. (p. 506, pi. xii), 
var. nov. major. Upper Burlington Limest., Burlington and Pleasant 
Grove, la. (p. 507, pi. xii); A. brevis , redescr., inch A. cornicidus 
Hall (p. 511, pi. xxxviii); A. bullatus , redescr., inch A. pentagonus 
Hall (p. 493, pi. xii); A. convexus, redescr., distinct from A. penta- 
gonus (p. 508, pi. xxxviii) ; A. coreyi , redescr., inch A. springeri White 
(p. 510, pi. xxxix); A. crassus , redescr. (p. 499, pis. xxxix & xl); A. 
elegans, redescr. (p. 500, ph xl) ; A. excavatus , redescr. (p. 491, 
pi. xxxix); A. fiscellus, redescr. (p. 512, ph xxxviii); A. gracilis , 
redescr. (p. 513, p. xii); A. injlatus , redescr. (p. 502, ph xii); A. 
nodosus, redescr. (p. 493, ph xliii) ; A. nodulosus , with var. macadamsi , 
redescr. (p. 497, pis. xxxix, xl, xliii); A. planoconvexus, redescr., inch 
A. decornis Rowley & Hare, ot A. blairi S. A. Miller (p. 503, ph 
xxxviii); A. pvramidatus, redescr., inch A. corrugatus Hall (p. 512, 
ph xxxviii) ; A. sampsoni , redescr., inch A. germanus et A. chouteau- 
ensis S. A. Miller (p. 505, ph xlvi); A. splendens , redescr., inch 
A. indianensis et A. gorbyi S. A. Miller (p. 495, ph xl); A. stellatus , 
redescr., inch A. geometricus Hall (p. 508, ph xxxviii) ; A. whitfieldi, 
redescr. (p. 496, pis. xlii & xliii) ; A. wortheni , redescr. (p. 490, 
pis. xxxix & xl) ; Wachsmuth & Springer (336). 
A. adamsensis, Burlington Group, Adams Co., 111.; Miller & Gurley 
( 233) Bull. Illinois Mus. ix, p. 24, ph i. — A. conicus, Keokuk group, 
Indian creek, Montgomery Co., Ind., 3 arms with cysts of 1 Myzostoma\ 
Wachsmuth & Springer (336) p. 501, ph xxxix. — A. hodgsom, Burling- 
ton Group, Adams Co., 111. ; Miller & Gurley (232) Bull. Illinois Mus. 
viii, p. 23, ph i. — A. illinoisensis, ibid . ; op. cit. p. 25, ph i. — A. iowensis , 
Keokuk group, Keokuk, la. ; Miller & Gurley (235) Bull. Illinois 
Mus. xii, p. 5, ph i. — A. keokukensis , ibid . ; op. cit. p. 7, ph i : n. spp. 
t Agassizocrinidce, defined; Zittel-Eastman (357) p. 162. 
t Agassizocrinusy chambered organ (p. 45), base (p. 59); Wachsmuth & 
Springer (336). 
A. oralis, Kaskaskia Group, Randolph Co., 111. ; Miller & Gurley (233), 
Bull. Illinois Mus. ix, p. 36, ph ii : n. sp. 
t Agriocrinus, discussed, syn. of Hapalocrinus, q. v. ; Bather (30) p. 343. 
f Adlagecrinidce, defined, includes only Allagecrinus ; Zittel-Eastman (357) 
p. 135. 
+ Allagecrinus , arm-branching (p. 78), muscle-plates (p. 87), orals (pp. 89, 
92); Wachsmuth & Springer (336). 
1897. [Vol. xxxiv.] 
E 26 
