ECHTNOIDEA. (IV, C.) 
Echin. 57 
t Amblypygus dilatcitus , a large specimen, the Clypeits (, Semi-clypeus ) 
pretiosus Mayer-Eymar, descr. and figd. ; Fourtau (96) p. 646, pi. i. 
Amphidetus :—vide etiam Echinocardium. History of the genus, the 
name preferred to Echinocardium , its geol. distrib. with list of fossil 
spp. (pp. 111-114); A. cordatus , variation in measurements, diagnostic 
characters, incl. Spatangus arcuarius Lam. and A. goldfussi L. Ag. 
(p. 109): Schlueter (209). A. gibhosus cited by Fischer, 1869, from 
S.W. coast of France is perhaps Echinocardium pennatifidum and not 
E. mediterranean as supposed by Ludwig, 1879; Koehler (141) 
p. 179. A. mediterraneus , diagnostic characters ; Schlueter (209) 
p. 108. A. ovatus , breeding period; Aurivillius (21) p. 14. 
t Amphiope, discussed; Airaghi (4) p. 155. A. arcuata ; Fourtau (96) 
p. 698. A. pedemontana , n. n.; Airaghi (3) p. 248: n. sp., Tongrian 
of Dego in Bormida basin; Airaghi (4) Boll. Soc. geol. Ital. xviii, 
p. 155, -pi. vi. A. truncata, Walther’s citation from Tor, Sinai, 
probably incorrect; Fourtau (96) p. 697. 
f Ananchytes seu Ananchytis :—vide etiam Echinocorys. A. depressa , 
specimen from Daghestan descr. and measured; Anthula (18) p. 59, 
pi. ii. A. ovata ; Anthula (18) p. 60; Toula (232) p. 66. 
t Anisaster gibberulus ; Fourtau (96) p. 668 & (98) p. 197. 
Arachnoides placenta ; Bell (32) p. 136. 
Arbacia-, Uexkull (235). A. punctulata, development of interambu- 
lacrals, variation in genital pores ; Jackson (127) p. 130, figs. 110, 
111 : effect of salt-solutions on ova ; Morgan (178) p. 449. A. pustu- 
losa, breeding period, habitat; Lo Bianco (147) p. 473. 
Arbacina , vide Psammechinus monilis. 
Archcieocidaris vel Eocidaris sp.; Fourtau (96) p. 612. 
Asthenosoma urens migrates from deep to shallow water at breeding 
period ; Semon (213) p. 508. 
t Astriclypeus integris \integer'] n. sp., Tertiary sandstone of Midzuhomura, 
Kai province, Japan; Yoshiwara (259) J. Geol. Soc. Tokyo, vi, p. 1, 
pi. ii. 
t Astrodapsis tumidus (p. 166), A. whitneyi (p. 167) redescr.; Merriam 
(175) pi. xxi. 
Astropyga elastica ; A. radiata , including a “quite young specimen”: 
Bell (32) p. 135. 
iBalbaster [? err. pro Bolbaster ] sp. nondescr. ; Boule (45) p. 133. 
iBothriolampas, n. g. an Eocene genus descended from the Cretaceous 
Bothriopygus , parallel to Pliolampas , and comparable to Pygurostoma, 
incl. 2 spp. Pygorhynchus abundans and Pliolampas tunetana; 
Gauthier in Fourtau (96) p. 652 : Lambert in .Review doubts 
validity of genus, and states that in any case it is syn. of Gitolampo.s 
Gauth. B. abundans Mayer-Eymar (sub Pygorhynchus [1897, as nom. 
mid., no other reference given, therefore this must be n. sp.]), Lower 
Suessonian of Gebel Garah near Assouan; Gauthier in Fourtau (96) 
p. 655, pi. i. 
Brissoma Pomel, vide sub Brissopsis. 
Brissopsis includes Toxobrissus and Brissoma-, Fourtau (96) p. 668. iB. 
sp. ind.; Airaghi (4) p. 165. fB. angusta ; Fourtau (96) p. 666. 
t B. cf. borsonii ; Airaghi (2) p. 371. t B. frcicisi , a small specimen 
descr.; Fourtau (96) p. 714. tZ>. geneiv ar. pliocenica (p. 366) ; L/5. 
cf. intermedins (pp. 369, 370) ; f B. latissimus (p. 366): Airaghi (2). 
t B. lorioli Bittner (sub Toxobrissus) redescr.; Fourtau (96) p. 666, 
pi. i. B. lyrifer, breeding period ; Aurivillius (21) p. 15. t B. cf. 
lyrifera (p. 369); t B. cf. lysetera [sic] (p. 368); fB. nicoleti (p. 371); 
t B. aff. ovatus (pp. 370, 371): Airaghi (2). t B. pasqualii Mayer- 
Eymar, probably not Brissopsis ; Fourtau (96) p. 690. \B. pecchiolii 
(p. 367); f B. cf. pecchiolii (p. 368) ; + B. ponteganensis, n. S., Pliocene 
