ECHlNOIDEA. (IV, C.) 
Echin. 75 
Echinoneus cyclostomus ; Bell (11) p. 247. 
\Echinopedina ( Stereopedina ) ameghmoi n. sp., Lower Miocene, Patagonia ; 
Loriol (200) p. 10, pi. i. 
Eckinosoma, rediagnosed, comprising E. ienue , E. Uranus ; Mortensen 
( 229) p. 62: diagnosed; Meissner in Hamann (125) p. 1351. E. 
uranus , radioles and pedicellariae ; Mortensen (229) p. 176. 
\Echinospatagus (vel — spatangus): — A. cordiformis ( — Toxaster compla- 
natus); Karakasch (163) pp. 213, 214. E. hofnianni ; Deecke (46) 
p. 37. 
Echinostrepkus , diagnosis as member of Echinometridae , with genotype 
E. molar e, and comprising ? E. pentagonus ; Mortensen (229) p. 139. 
E. molar e ; Bell (11) p. 247 : descr. ; Mortensen (229) p. 128. 
Echinothrix diagnosed; Meissner in Hamann (125) p. 1358. E. cala- 
maris , inch A. desori Al. Ag., but Astropyga desori Ag. fr. Red Sea is 
regarded as a var. ; Doederlein (62) pp. 687, 698, pis. lix, lxiii : v. et. 
Astropyga pulvinata. E. diadema , incl. E. turcarum ; Doederlein 
( 62) p. 688. E. turcarum ; Whitelegge (322) p. 12. 
Echinothuridae , classification discussed (p. 43) and following genera based 
largely on pedicellariae : Phormosoma, Eckinosoma ? Astkenosoma , 
Codveria , Araeosoma , Hapalosoma , Hygrosoma , TromiJcosoma , Spero- 
soma , Kamptosoma (p. 62) ; Mortensen (229). 
Echinus Rond, em., discussed, with genotype E. escidentus (p. 98), diagnosis 
as member of Echininae , comprises A. acutus , mefo, elegans , gracilis , 
alexandri , lucidus , ajfinis , atlanticus (p. 134), E. aciculatus, syn. of 
Paracentrotus gaimardi (p. 179); Mortensen (229). A. acutus \ 
Nichols (236) p. 260: Simpson (294) p. 42: development; MaoBride 
( 207) p. 294 : redescr., inch E. depresses, rarispinus , and “microstoma , 
also varr. weZo, fiemingi and norwegicus , and n. var. mediterranean 
•distrib. ; Mortensen (229) p. 152, pis. i, ii, xv, xvi, xviii, xix, xxi: 
from Ascension vide E. atlanticus : var. norwegicus , differences fr. 
i?. ajjinis (p. 179), 2£ atfinis n. sp., archibenthal zone of N. Atlantic, 
cotypes in Copenhagen Mus., previously confused with A 7 , alexandri 
and A. norvegicus{ p. 150, pis. v, xv, xvi, xviii, xix, xx, also pp. 100, 179), 
A. albocinctusn descr., pedicellariae figd. (p. 104, pi. xix) ; Mortensen 
(229). A T . alexandri ; Richard (271) p. 66 : distinguished fr. A. lucidus 
(p. 100), redescr., distrib. (p. 146, pis. v, xv, xvi, xviii-xxi), A. angulosus , 
descr., pedicellariae figd., refd. to Parechinus (q.v.) (p. 108, pi. xvii) ; 
Mortensen (229). A. armatus n. sp., Sulu Sea ? ; De Meijere (53) 
p. 5. A. atlanticus n. sp. for “ E. acutus ” from Ascension, cotypes in 
Brit. Mus.; Mortensen (229) p. 101, pis. xviii, xix. A. cidaris L. 
v. sub Cidaris et Phyllacanthus. A. darnleyensis , specimen fr. Thursday 
Id., in Brit. Mus., descr., pedicellariae and spicules figd. (p. 110, pi. xxi), 
refd. to Gymnechinus (q.v.) (p. 115), A. diadema , refd. to A. margari- 
taceus (p. 102); Mortensen (229). A. elegans ; Nichols (236) p. 261 : 
distinguished fr. A. acutus (p. 99, pi. xviii, xx), inch ? A. wallisi , redescr., 
specimens so called in Challenger Rep. are not this sp. (p. 142, pis. i, 
iii, xv, xvi, xviii, xix, xx), specimens recorded from Tristan d’Acunha 
not this sp. (p. 101), “A. elegans ? ” Studer fr. C. Verd are Genocidaris 
maculata and Parechinus sp. (p. 179), A. elevatus Hutton, syn. of 
Amblypneustes formosus, fide Hutton (p. 104) ; Mortensen (229). 
A. esculentus ; Lonnberg (197) p. 25: Michailovskij (223) p. 524: 
Nichols (236) p. 261: NormAn (239) p. 410: Ottolenghi (245): 
Petersen (259) : Simpson (294) p. 42 : Thomson & Rennie (304) p. 53 : 
development; MacBride (207) & (210): larval brain; MacBride 
( 208 & 207) : dissection and good diagrams ; Kuekenthal (173) p. 136 : 
anat. apical pole; Wagner (316) pi. viii : descr., esp. ambulacral 
areas, radioles, plates of buccal membrane, and pedicellariae, distrib. 
(p. 160, pis. i, iii, xv, xvi, iviii, xix, xx), Mediterranean and , Port 
1903. [Vol. XL.] E 29 
