386 SMITHSONIAN INSTITUTION 



Taxocrinus telleri n. sp. 



Plate LII, figs. 7-8 



Taxocrinus intcrscapularis, Cleland, Wisconsin Geol. Nat. Hist. Surv., Bull. 21, 1911, p. 42, pi. 3, figs. 11, 12. 



A rather small species. Crown elongate, widest about lower IIIBr; height 

 to width about 2.3 to 1. Calyx narrow, with curving sides; base small; height 

 to width at I Ax, 1 to 1. 3; spread from base, 1 to 3. Arms tapering slowly to 

 3 bifurcations, with long divisions; sutures broadly sinuous. iBr few, areas 

 rather narrow, mostly filled with perisome. Surface smooth. Dimensions of 

 crown in adult specimen: height, 40 mm.; width, 17; base, 5. 



IBB low. BB of good size with acute angles. RR and IBr large, twice as 

 wide as long, of about the same form and size. IBr 3; IIBr usually 5. IIIBr 

 about 14 outer and 7 or 8 inner, with one or more bifurcations visible; arms 

 infolding beyond this with very long finials. Anal series composed of elongate 

 plates, their full structure not known. Column unknown. 



This species is proposed for some Hamilton specimens from Milwaukee, which I was 

 unable to refer satisfactorily to any known species. They were found by Mr. E. E. Teller 

 of that city, 'a business man who is a keen observer and ardent lover of science, and whose 

 name I have pleasure in associating with the species. The nearest related form is T. inter- 

 scapularis from the Iowa Hamilton, which differs in the number of IIBr and in the arrange- 

 ment of IIIBr. The small specimen figured (PL LII, figs. 8a-d) is a remarkable variation 

 from the normal crinoid. It has 7 rays ; one with 3 IBr, and six with 2, in one of which the 

 R is split vertically. The basal ring, IBB and BB together, is fused into a single solid plate. 

 According to the number of primibrachs in most of the rays it would belong to Eutaxocrinus; 

 but in view of its great irregularity this may not prove anything, and as the specimen was 

 found associated with the fine adult specimen (figs. Ja, b), I have placed it here to illustrate 

 a striking example of abnormal growth. 



Type. Collection of Mr. E. E. Teller, of Milwaukee, Wisconsin; — a careful and intelli- 

 gent collector, to whom I am indebted for valuable information. 



Horizon and locality. Middle Devonian, from an outlier of the Hamilton group ; near 

 Milwaukee, Wisconsin. 



Taxocrinus lobatus (Hall) 

 Plate LII, figs, p-11 



Forbcsiocrinus lobatus Hall, 15th Rep. New York St. Cab. Nat. Hist., 1862, p. 124; Bull. I, New York 

 St. Mus. Nat. Hist., Photographic Plates, pi. I, fig. II. 



Taxocrinus lobatus, Wachsmuth and Springer, Revision Palaeocrinoidea, pt. I, 1879, p. 49. — Wood. Smith- 

 sonian Misc. Collections, XLVII, 1904, p. 81. 



Not Taxocrinus lobatus var. Whiteaves, Contrib. Canadian Pal., I, pt. 2, 1889, p. 94, pi. 12, fig. 1. 



A medium-sized species. Crown elongate, turbinate below ; height to width 

 at second axillaries, 1.9 to 1. Calyx narrowly spreading, 1 to 3, with nearly 

 straight sides; height to width at I Ax, 1 to 1.4. Arms large and deeply rounded, 

 strongly divergent, tapering very gradually, the first division series being almost 

 as large as the primibrachs; infolding about the fourth bifurcation, but much 

 longer and bifurcating further beyond; sutures strongly arcuate, and a strong 



