114 fdNTlilEUTIONS TO CANADIAN rAL.T;nNTOLIi(;y. 



ECHIKODERMATA. 

 CKINOIDEA. 



Taxockinus lobatus, Hal], va:-. 



Plate 12, fig. 1. 



Forh, Kiorrirnislnhnliif, Hall 1S02. Fifteenth Eep. N. York St. Cab. Nat. Hist, 



p. 124. 

 2>/,.rj,r(//»s /o^iii's, Wachsmuth and Springer. 1879. Rev. Palajocrinciidea, pt. 



1, p. 49. 



Miller. 1883. Cat. Am. Pal. Foss., Second Ed., p. 288. 



Plates of the " doi-hal cup " and arms of apparently the .^ame shape, 

 nurnbei-, and disposition as thoso of the type of T. lobatus, but the 

 bifurcating plates or third i-adials of the Canadian variety are desti- 

 tute of iiode>. and the entire surface appear.^ to he smooth rather than 

 " tinely granulose." This latter circumstance, however, may be due 

 to a slight weathering of the specimens. 



year Thedford, Rev. Hector Currie, two specimens; one collected in 

 1882 and the other in 188.3. 



These two fb--sils are regarded with some donljt as a local vai-icty of 

 Taxocn'nus lobatv.s, principally upon the authority of Mr. Charles 

 Wach^muth who has examined and reports as follows upon them 

 in a letter to the writer: "I have compared the two specimens with 

 Forlifsii'Crimis lohatus and F. nuntin.-. Hall, which ai-c both Ta.cocrriitis. 

 They differ froin both of thc^e ^jiecies in having neither, node- nor 

 s]iinc'S uj)on their bifurcating plates. The nodes, howevei', might be 

 undeveloped, as i-; the case ^onretimc- in Tit.irjcrinus T/u'rmei, ami this 

 is the )iiO]-e probable a^ the specimens agree in other i-espects with 

 Hal^.^ drseription of Forbcsiocnnns nnninis. It is vejy curious that 

 Hall, in his desriiption of Foi'hesiocrinus imiitius, .spoak's of thr very 

 remarkalile re-cmblancc of this s]iccies to F TJu'emei and that in \'ol. 

 2 of th(,' Cjhio Rejjort, PI. 12. tig. 2, a ^-|iccimen which is almo-t identical 

 with Tcuocrinus Thiemei i.-, called Furhesiocrinas lohatus, vai-. turthia and 

 not F. nuntius, var. tar'lus, as it ought to be. I have irmipared your 

 specimens aKo with TaxocriniLs Itlu'ij-emia, ^Villiam-, with which they 

 auTcc more cln^ely than hi- figures on Plate 1 would suggest. I have 

 good India rubber casts of his type specimens, and tind in none of 

 them the second primary j-adials m> widely si-jjarated a- in hi- figure. 

 He descrilie- all plates in a radial direction from the fir-t primary 

 j'adial up as brachials and ai-m plates, i. e. as free plates: while in fact 



