ECflINOlDEA. 
Ech. 69 
incrassatus , Clark ; Clark (3G) p. 84. +77. stella (angustipneustes), 
Des., Senonian of Angouleme; Arnaud (9) p. 25. +77. texanus, 
Roem., redescribecl and held to include II. americanus , Giebel, and 
possibly Periaster australis, Gabb ; Clark (36) p. 86. MI. ungula, 
Morton sp., redescribed ; Clark (36) p. 85. 
MI. calvini, Shoal Creek Limestone, top of Comanche series, Lower Creta- 
ceous, Travis Co., Texas, Clark, Bull. U. S. Geol. Surv. No. 97, p. 90, 
n. sp. 
MIemicidaris : — II. hoffmanni , F. A. Roem.; Smith (250) p. 346. II. inter- 
media, Flem. sp. ; Fox-Strangways (87) n, p. 196, Smith (250) 
p. 346, Greppin( 104) p. 99. II. langrunensis, in Terebratula viaxil - 
/nta-beds near Basle ; Greppin (103). II., cf. oblique-lineata , Stopp. 
sp., spines only ; Simonelli (246) p. 243. II. sp., Lower Lias, 
Calabria; Greco (100) p. 79. 
II. bigoti, Toarcian of May in Calvados, Cotteau, Mem. Soc. zool. 
France, vi, p. 345 ; II. intumescens , Jurassic, Taylorsville, California, 
Clark, Bull. U. S. Geol. Surv. No. 97, p. 44 : n. spp. 
Mlemidiadema, re-diagnosed and maintained, and II. rugosum , Agass., 
redescribed from fresh material ; Lambert (145) p. 68. 
f Hemipedina : — H. beehei, Brod., II. bowerbanki, Wright; Woodward 
( 276) p. 370. H. corallina, Wright; Fox-Strangways (87) n, 
p. 196. II. etheridgei, Wright, H. jar dim, Wright; Woodward 
( 276) p. 370. H. struckmanni , Dames ; Smith (250) p. 346. H. 
tomesi, Wright; Woodward (276) p. 370, Fox-Strangways (87) 
ii, p. 32. II. woodwardi, Wright; Fox-Strangways (87) n, p. 145. 
Mlemipneustes , Agass., described and discussed ; Cotteau (38) p. 1 : 
discussed ; Lambert (146) pp. 79 & 95. II. africanus , Desh. ; 
Cotteau (38) p. 7. H.cotteaui, Lambert, compared with II. arnaudi] 
Cotteau (42) p. 734: syn. of II. tenuiporus\ Cotteau (38) p. 10. 
H. delettrei, Coq. ; Cotteau (38) p. 8. 77., cf. delettrei , Danian of 
Angouleme ; Arnaud (9) p. 35. II. italicus, Manzoni, a doubtful 
form ; Lambert (146) p. 95. II. leymeriei , H6b.; Cotteau (38) 
p. 8. H. marticensis, Cott. sp.; op. cit. p. 9. 77. pyrenaicus , H6b., p. 8; 
Cotteau (38), Fallot (78) p. 358. H. semistriatus , d’Orb. sp.; Cot- 
teau (38) p. 9. II. striato-radiatus, Leske ; op. cit . p. 7. H. tenui- 
porits , Cott. sp., discussed ; op. cit. p. 10. 
H. arnaud i, Upper Senonian of Sergeac in Dordogne; Cotteau, Mem. 
Soc. zool. France, v, p.733, H. oculatus, Upper Senonian, Ciply, 
Cotteau, Mem. Soc. malac. Belgique, xxv, p. 4 : n. spp. 
f Heteraster texanus , Room.; Aguilera (4) p. 26. 
Heterocentrotus mamillatus, Agass.; Loriol (154) p. 374. 
MIeterocidari8 wickensis, Wright sp.; Fox-Strangways (87) n, p. 145. 
Mleterodiadema libycum, Cott. ; FlCHEUR (81) p. 412. 
t Heteropneustes, Pomel, emended ; H. cotteaui , Pomel, and H. semistri- 
atus, Potnel, referred to Hemipneustes ; Lambert (146) p. 95. 
Hipponoe esculenta, A. Agass., protection ; Field (82) p. 83, Studer 
( 256) p. 22. II. variegata, Leske, carries sea-weed to protect ova ; 
Studer (256) p. 235. 
