Mr. F. A. Bather on British Fossil Crinoids. 387 



Cceliccrinus — " in its aim-structure leans decidedly towards Woodocrinus." 



W. & S. Rev. III. (245) Proc. 1886, p. 169. 

 Crcmyoerinus — 15 ; brachials short, at first quadrangular, then cuueate 

 and in some species interlocking. 



Cyathocrinus — 3. 



Dadocrinus Kunischi — 17 ; after Kunisch, Zeitschr. d. deutsch. geol. Ges. 

 xxxv. pi. viii. 1883. In the separation of Dadocrinus and Holo- 

 crinus from Encrinus, I have followed W. & S. ; for a conspectus 

 of the literature see II. Eck, " Bemerkungen liber einige En- 

 erinus-Arten," Zeitschr. d. deutsch. geol. Ges. xxxix. 540, 1887. 



Decadocrinus — 14. 



Dendrocrinus — 4. 



Ectenocrinus — 7. 



Edriocrinus — arms broad at base ; in E. sacculus costals 10 or more, dis- 

 tichals 3 or 4, palmars 3 or 4, all very short and wide ; nothing 

 known of pinnules; Hall, Palaeont. N.Y. iii. pi. Lxxxvii. fig. 10. 



Encrinus — 18. 



Erisocrinus — 15 ; costals abut laterally ; brachials uniserial, transversely 

 oblong. 



Eupachycrinus — as in Cromyocrinus ; arms from 1 to 3 in a ray. 



Eusjnrocrinus — 3 ; ossicles stout and wide. 



Gissocrinus — 3. 



Graphiocrinus — 15. 



Herpetocrinus — 4. 



Heterocrinus exilis — 5 a ; H. jnvenis — 5 b ; both after Hall, Rep. Geol. 

 Surv. Ohio, Palaeont. i. pi. i. figs. 12 and 3 a. 



Holocrinus Beyricki— 19 ; after Picard, Zeitschr. d. deutsch. geol. Ges. 

 xxxv. pi. ix. figs. 4 and 1. 



Homocrin us — 4. 



Hoplocrinus — 1 b. 



Hybocrinus amicus — 1 b ; after E. Billings ; in Canadian Org. Rem. decade 

 iv. pi. ii. fig. 2 /;, the long arms are all shown. 



Hydreionocrinu8 — 16 ; throw off branches towards inner side of raj', meet 

 laterally ; earlier ossicles cuneate and tend to interlock ; pin- 

 nules short. 



Hypocrinus — arms unknown, evidently very small. 



Iocrinus — 2. 



Lecyth iocrinus — arms unknown . 



Lecythocrinus — 3 ; see Schultze, " Echinod. Eifler Kalkes," Denkschr. k. 

 Akad. AViss. xxvi. pi. iv. tig. 1, Wien, 1867. 



Merocrinus — 2 ; see Walcott, State Mus. 35th Regent's Rep. pi. xvii. 

 figs. 5 and 6, 1883. 



Mycocrimts — arms unknown, probably as in CatiUocrinus. 

 Ohiocrinus oehanus — 6 ; after Ulrich, Journ. Cinciun. Soc. Nat. Hist. v. 

 pi. v. fig. 9. 



Oncocrinus — simple, dichotomous, with broad ossicles. Cyatliocrinites 

 scrobicu/afuSfllisingeY (Leth. Suec.Suppl. Secund. p. 6, tab. xxxix. 

 fig. 4, a, b, c : Stockholm, 1840), appears to be of the same genus 

 as the specimens I was about to describe as Oncocrinus bucepha- 

 lus. C. scrobiculatus, however, has been referred by Angelin 

 (Icon. Crinoid. pp. 13 and 14) to his genus Pycnosaccus. This 

 genus has been placed by W. & S. in the Ichthyocrinidse as a 

 subgenus of Lecanocrinus (Rev. I. (41) Proc. 1879, p. 264), and, 

 so far as P. nodulosus, Aug., is concerned, they are no doubt 

 right. P. costatus, Aug., was by both Angelin and W. & S. 

 regarded as belonging more probably to the Cyathocrinidse 

 (auctorum) ; this also seems correct. But P._ costatus was in 



