CYSTIDKA. (IV, G.) 
Echin. 129 
(G.) — +CYSTIDEA. 
Defined and restricted by removal of Amphoridea (p. 443), classified (p. 
551); Haeckel (116). — Defined (p. 72), and classified (p. 73), system 
(p. 77), structure discussed (p. 78); the genera of Barrande “Syst. 
Silur. de BohGme” vol. vii referred to genera, sub-families, and 
families of Haeckel (p. 166); Haeckel (118). — Haeckel’s definition 
discussed; Gregory (109) p. 128.— Classification ; Jaekel (143). 
General account and synopsis of chief genera; Koken (171) p. 288. — 
General account, no Orders recognised, but Families Aristocystidce , 
Ca??iarocystidce , Echinosphceritidce , (Jryptocrinidce , Caryocrinidce , A no- 
malocystida ?, Callocystidce , Agelacriniace ; Zittel (356) p. 148, and 
Zittel- Eastman (357) p. 177.' 
Acanthocystida , sub-fam. nov. of Palceocystida , for Acanthocystis and 
Arcnceocystis ; Haeckel (118) p. 64. 
Acanthocystis ; Haeckel (117) p. 402: redefined; Haeckel (118) p. 70: 
“has long been preoccupied among Protozoa by Carter” [to be precise, 
since 1863]; Gregory (109) p. 133. — A. briareus , redescribed; 
Haeckel (118) p. 71, pi. i. 
Achradocystis, redefined and made to include Cyclocrinus Eichw. [which is 
no Echinoderm], A. grewingkii , redescribed; Haeckel (118) p. 56. 
Agelacrinidce , defined, includes Agelacr. (subgenn. Lepidodiscus , Hemicystis , 
Cy taste?', Edrioaste ?•), Mesites , Astei'oblastus , ? Tkiract . ; Zittel (356) 
p. 157, and Zittel-Eastman (357) p. 187. 
Agelac?'inus\ Haeckel (117) p. 401: redefined (p. 112); A. buchianus , 
referred probably to Edriocystis (p. 113); ^4. dicksoni (p. 113); >4. 
cellatus , redescribed (p. 112, pi. iii); Haeckel (118). 
Agelacystida or Agelaerinida ; Haeckel (117) p. 401. — Agelacystida, fam. 
nov., including sub-famm. Hemicystida and Asterocystida\ Haeckel 
( 118) pp. 77, 107. 
Agelacystis , n. g., with genotype 4. hamiltonensis [which unfortunately is 
genotype of Haeckel (117) p. 401, & (118) p. 114, 
pi. iii. 
Amorphocystis, n. g., with genotype “ Caryocystis testudinarius , v. Buch.” 
[non Hisinger] and including C. pumilus, Eichw.; Jaekel in Koken 
( 171) p. 411, footnote: name unnecessary, Review in Nat. Sci. 
Amphoracystis, n. g., with type A. irregularis (olim Deutocystis ) Barr., 
described and figured; Haeckel (118) p. 52. 
Amphorcea, hypothetical ancestral genus; Haeckel (118) p. 31. 
Amphoralia , subclass of Amphoridea ( — Amphoridea bilateralia ) ; Haeckel 
( 116) p. 429: defined; Haeckel (118) p. 12. 
Amphoridea , removed from Cystidea as a new Class, defined (p. 423), their 
system in a table (p. 430); Haeckel (116): proposed as Class; 
Haeckel (117) p. 394: defined (p. 9), classified (p. 11); Haeckel (118). 
Amphoronia , subclass of Amphoridea ( = Amphoridea monaxonia) : Haeckel 
( 116) p. 429: defined; Haeckel (118) p. 12. 
Amygdalocystis , redefined, A.Jlorealis , redescribed; Haeckel (118) p. 106. 
Anomalocystidce defined, includes Trochocystis , Mitrocystis , Anomalocystis , 
Balanocystis , Dendrocystis, Pleurocystis ; Zittel (356) p. 156, & Zittel- 
Eastman (357) p. 185. 
Anomocystida or Pleurocystida ; Haeckel (117) p. 398. — Anomocystida , 
defined as including Anomalocystida and Pleurocystida , and fully dis- 
cussed; Haeckel (118) pp. 12, 33. 
Anomocystis, nom. nov. pro Anomalocystis Hall; Haeckel (117) p. 398: 
redefined; Haeckel (118) p. 40. — A. cornuta , and A. aisparilis , re- 
, described; Haeckel (118) p. 41, pi. ii. 
Anthocystida, sub-fam. nov. of Callocystida ; Haeckel (118) p. 129. 
