1886.] NATURAL SCIENCES OF PHILADELPHIA. 105 



It has been overlooked, however, that in the two radials adjoining 

 the anal opening the passages of the axial cords are placed con- 

 siderably to one side, leaving sufficient space for an anal plate 

 such as we find in Symhathocrinus^ and whose presence we postu- 

 lated in Phimocrinus. That such a plate really existed, is more 

 probable since we find in G. gracilis the margin which forms the 

 anal opening at one side considerably raised, and there are 

 irregular upperedgesas if these had formed the baseof an anal tube. 



The column is circular, triangular or quadrangular, composed 

 of short joints. It contains four large peripheral canals, rarely 

 three or five, and a central one, which is either confluent with the 

 others or isolated. It is frequently provided with cirrhi, which 

 have two canals, vertically arranged, and these also are frequently 

 confluent. 



Geological Position, etc. Gupressocrinus is only known from 

 the lower portions of the Devonian of Europe. 



N. B. Gupressocrinus duhius and G. teres A. Roemer, and G. 

 jientaporus Eichwald, were described from pieces of column ; G. 

 calyx McCoy = Hydreionocrinus calyx (Rev. ii, p. 131); G. im- 

 pressus McCoy probably is Eupachycrinus. 



]8;i8. Gupressocrinus abbreviatus Goldf., Nova Acta Ac. Leopold, xix, Pt. i, p. 383, 

 PI. 30, fig. 4. D'Orbigny, Prodr. i,p. 102. Roemer, 1855, Leth. Geogn. (Ed. 

 3), i, p. 232. Schultze, 1866, Echin. Eifl. Kalk., p. 19, PI. ii, fig. 1, and PL 

 iii, fig. 3. Dujardin and Hupe, 1862, Hist. nat. Zooph. Echin., p. 112. 

 Devonian. Eifel, Germany. 



Schultze recognized the following varieties : C. alta, C. granulosa, C. hybida 

 and C. minor. 



Syn. Halocrinites Schlotheimii Steininger, Mem. Soc. geol. de France i, p. 349, 

 PI. 21, fig. 1. 



Syii. Gupressocrinus Schlotheimii Steininger, Geogn. Resch.reib. d. Eifel, p. 

 36, and Versteiu. der Eifel, 1849, p. 21. 



Syti. C. pyrimidalis Stein., Bull. Soc. geol de France (Ser. i), ix, p. 295, PI. 4. 



Syu. G. nodosus Sandberger, Versteiner. Nassau's, p. 401, PI. 35, fig. 5. 



Syn. C. Urogalli Roemer, Palaeontgr. iii, p. 9, PI. 2, fig. 7. 

 1826. C. crassus (ioldfuss (Type of the genus), Petref. Germanite i, p. 212, PI. 64, fig. 

 4 ; also 1838, Nova Acta Ac. Leopold, xix, Pt. i, p. 331, PI. 30, fig. 1, Agassiz, 

 1835, Soc. de Neuchat. i, p. 198. D'Orbigny, 1850, Prodr. i, p. 102. Bronn., 

 Lethaea Geogn. 1 and 2. F. Roemer, Leth. Geogn. i, 1855 (Ausg. 3), p. 232, PL 

 4, figs 9 a, b, c. Bronn, 1860,Classen dee Thierreichsii,Pl. 28, fig. 1. Dujardin 

 and Hupe, 1862, Hist. nat. Zooph. Echin., p. 112, PI. 5, fig. 12. Schultze^ 

 ] 866. Men. Echin. Eifl. Kalk., p. 23, PI. 3, fig. 1. Devonian. Eifel, Germany. 



Si/ii. Cypressocrinus crassus Steininger, Geogn. Beschreib. d. Eifel, p. 36 and 

 Versteiner. d. Eifel, p. 20. 



Si/ii. Gupressocrinus ^tetragonus GoIdfu.ss, Nova Acta Ac. Leopold. .\ix, Pt, i, 

 p. 332, PI. 30, fig. 3. 



8 



