94 PROCEEDTNQS OP THE ACADEMY OF [1886. 



evidently was extended into a tube, as in Symbathocrinus. The 

 form of the arms is not known. Column pentagonal, with a 

 small pentalobate central canal. 



Geological Position, etc. Phimocrinus is restricted to the 

 lower part of the Devonian. 



1882. Phimocrinus Jouberti Oehlert, Bull, de la Soc. G^ol. de France, Ser. 3, tome 



X, p. .352, PI. 8, fig. 1. Devonian. Sabr6, France. 

 1866. Ph. laevis, Schultze (Type of the genus), Monogr. Echin. Eifl. Kalk., p. 29, 



PI. 3, fig. 6. Devonian. Eifel, Germany. 

 1866. Ph. quinquangularis Schultze, Monogr. Echin. Eifl. Kalk., p. 30, PI. 3, fig. 7. 



Devonian. Eifel, Germany. 



STYLOCRINUS Sandberger. 



(Re-defined by "W". and Sp.) 



1850. Versteinerungen Nassau's, p. 400. 



Syn. Platycrinus (partim) Goldfuss, 1838. Nova Acta Leop. XIX, 

 i, p. 345 ; also Quenstedt, 1852, Handb. d, Petrefactenk., Ed. 1, 

 p. 618. 

 Syn. Symbathocrinus (partim) Miiller, 1855, Verb, naturb. Verein 

 fiir Rbeinlande, xii, p. 19 ; also Neue Ecbin. Eifl. Kalk., p. 257 ; 

 Scbultze, 1866, Monogr. Eifl. Kalk ., p. 26 ; Zittel, 1879, Handb. 

 d. Palseont., i, p. 349. 



Stylocrinus has been generally regarded as identical with 

 Symbathocrinus, and Sandberger, when he proposed the name, 

 failed to point out the generic differences. He applied the name 

 to a species from Vilmar, which afterwards was found to be 

 specifically identical with " Symbathocrinus " tabulatus, from the 

 Eifel. The absence of an anal plate, and even of an anal opening in 

 the Eifel species, was overlooked or disregarded by all European 

 writers. Zittel described the ventral side of Symbathocrinus as 

 plated, and containing an anal tube reaching to the tips of the 

 arms ; he also spoke of oral plates, which were said to form 

 beneath the vault a concealed consolidating apparatus. This 

 description, incorrect as it is, was evidently made from the 

 Carboniferous form, as in the Eifel species nothing is known of 

 the calyx beyond the radials. In Symbathocrinus the anal 

 opening is located between two of the muscle-plates ; but in the 

 Eifel species, which we make the type of Stylocrinus, the mus- 

 cular appendages of all the radials are suturally united. This 

 suggests that the opening probably penetrated the interradials, as 

 in Haplocrinus, and it may have had, like that genus, only an 

 oral plate and no proximals. 



