52 Echin. 
XIV. ECHINODERMA. 
[1904] 
fArachniopleurus; Mortexsen (195) p. 112. 
Arachnoides diagnosis ; Meissner in Hamann (112) p. 1382 : name 
rejected, should be Echinodiscus ; Fourtau (83) p. 424. A. placenta ; 
DE Meijere (57) p. 137, pi. xix : Martexs (185). 
Araeosoma descr. ; Delage (54) p. 223, fig. : criticised ; Agassiz (3) 
p. 83. A. owsteni (corr. owstoni) n. sp., Sagami B., 50 fm. ; Mortensen 
(194) p. 82, pi. ii, V. A. te^sellatum^ radioles, pedicellariae, spicules ; 
DE Meijere (57) p. 35, 250, pi. xiii : %]\x^.=A8thenomma gracile A. Ag. 
Challenger Stat. 219 ; Mortensen (194) p. 86, pi. iv. 
Arhacia ; Delage (54) p. 237 : versus Echinocidaris, discussed ; Loriol 
(162) p. 13 : development of coronal plates ; Agassiz (3) p. 54, pis. 
liii, liv : experiments on sperm-ovum ; Lyon (171). A. dufo-esnii, 
inch A. schytei & A. alternans, descr., with young ; Loriol (162) p. 8, 
pi. ii. A. nigra ; DE Meijere (57) p. 207. A. punctata^ pluteus ; 
Weyssb (284) p. 100, fig. A. punctidata, descr., range ; Clark (38) 
p. 563, pi. vii. A. pustulosa ; Di Mauro (63). A. \) pustulosaf]; 
Janssens (136). 
Arhaciinae defined with list of genera ; Delage (54) p. 237. 
Arhacina diagnosis ; Meissner in Hamann (112) p. 1367. L. forhesiana 
referred to Prionechinus (q. v.) ; de Meijere (57) p. 71. 
■\ Archaeocidaridae defined ; Klem (142) p. 45. 
i Archaeocidaris ; Delage (54) p. 218: defined, synn, Echinocrinus, Palaeo- 
cidaris; Klem (142) p. 45. A. sp. ; Beede & Rogers (21) : Hind 
(123) pp. 186, 188 : ? ; Kittl (141) p. 685, pi. xxii : Etheridge 1892, 
Julien 1896, Meek 1859, & Stacke 1877 ; Klem (142) p. 65. A. 
aculeatus (p. 45), A. agassizi (p. 46), & A. hiangulatus (p. 47) descr. ; 
Klem (142). A. cf. hiangulata ; Richardson (227) p. 37. A. cratis 
(p. 47), A. dininni, & A. edgarensis (p. 48) descr., A. glahrispina 
(p. 62), A. gracilis descr. (p. 49), A. grueneri (p. 62) ; Klem (142). 
A. harteiana vide Ferischodomus hartei. A. illinoisensis (p. 49) & A. 
keokuk (p. 50) descr. ; Klem (142). A. keyserlingi, radioles ; Kittl 
(141) p. 684. A. konincki ; Klem (142) p. 63. A. ladina ; 1. c. : 
radioles ; Kittl (141) p. 684. A. legrandensis (p. 50), A. longispinus, 
A. megastylus (p. 51), A. mucronatus (52), A. nerii [sic], incl. Cidaris 
protei (p. 52), A. newberryi (p. 53), A. norwoodi, A. ornatus (p. 54), all 
descr., A. ourayensis^ A. priscus (p. 63) ; Klem (142;. A. regimontana 
XL. sp., Visean of Konigsberg near Giessen, interambulacrals ; 
Parkinson (206) p. 365, pi. xv. A. rossicus descr. (p. 55), var. 
schellwieni, A. scotica Smith [!, i.e. J. Young], A. (?) selivyni (p. 64), 
A. shumardanus descr. (p. 56), A. spinoclavatus descr. (p. 57), A. 
tennesseae^ A. tirolensis (p. 64), A. trautscholdi (p. 65), ^4. triplex desov. 
(p. 57), A. triserialis & A. triserratus descr. (p. 58), A. trudifer descr. 
(p. 59) ; Klem (142). A. iirei; Fraipont (85) p. 11, pi. i : Hind (123) 
p. 192: Peach (209) p. 848 : descr.; Klem (142) p. 59. A. vetustus 
descr, ; Klem (142) p. 61. A. ivervekei \ Fraipont (85) p. 11, pi. i : 
Klem (142) p. 65. A. wortheni descr. ; Klem (142) p. 61. 
Archaeocidarisinae defined with list of genera ; Delage (54) p. 218. 
Arcliaeopneustes, genotype A. hystrix is syn. of Paleopneustes, but [Jl. 
abruptus] is more allied to Aniphipneustes ; Agassiz (3) p. 186. 
Argopatagus, diagnosis; Meissner in Hamann (112) p. 1401: & Ge?ii- 
copatagus compared with Palaeotropiis^ Ho/uolampas, Pkrissocystis, & 
Palaeobrissus (p. 172), A. vitreus (p. 172, 183, pi. xci) ; Agassiz (3). 
Aspidodiadema; Delage (54) p. 230, fig. A. antilla7'um, tubercles, 
pedicellariae, referred to Dennatodiadema (q. \.) = Plesiodiadema (p. 37, 
pi. iii-v), C. jacobyi, spicules, pedicellariae, A. microtuberculatumy 
specimen fr. Challenger Stat. 134 taken as genotype, tubercles, pedi- 
cellariae, referred to Dennatodiadema (q. x.) = Plesiodiadema (p. 36, 
pi. iii-v); Mortensen (195). A. nicobaricum, descr.; de Meijere 
