8o 
SAIITHSONIAN INSTITUTION 
are usually large, small ones rarely seen; maximum calyx 6 mm. high at arm 
facets, 9 mm. wide at that level and 5 mm. wide at the base. Arms unknown. 
This is a very characteristic species of the Brownsport group of Tennessee ; is widely 
distributed, occurring at numerous localities and ranging through several formations. It has 
lately been discovered by Dr. Weller, with thoroughly representative specimens, in the Bain- 
bridge limestone of Missouri. While nowhere abundant, it is well represented in the collec- 
tions, and is remarkably constant in its characters. The only species at all resembling it is 
Triacrinus depressus of the Eifel Devonian, through which the evident succession of the 
two genera can be readily traced, specimens of it showing variations of 3 to 5 basals. 
Pisocriniis tennesseensis is not listed in Bassler’s Bibliographic Index, nor was it recog- 
nized by Miss Wood in the Troost Monograph, being reported in both under Roemer’s name 
Symbathocrinus, notwithstanding Wachsmuth and Springer in part 3 of their Revision, had 
in two places definitely referred the species to Pisocriniis. 
Horizon and locality. Dixon beds and through the Brownsport, Niagaran. At four 
localities along Beech River in Decatur County, at Martin’s Mill and another locality in 
Wayne County, and one in Perry County, Tennessee. Also Bainbridge limestone, Ste. Gene- 
vieve County, Missouri. 
Pisocrinus pyriformis (Ringueberg) 
Plate 24, fig. 37 
Triacrinus pyriformis Ringueberg, Proc. Acad. Nat. Sci. Phil., 1884, p. 145, pi. 3, fig. i. 
Pisocrinus globosus (Ringueberg) 
Plate 24, fig. 38 
Triacrinus globosus Ringueberg, Proc. Acad. Nat. Sci. Phil., 1884, p. 146, pi. 3, fig. 2 . — Pisocrinus globosus 
S. A. Miller, N. A. Geol. Pal., 1889, p. 269. — Rowley, Am. Geol., 1894, P- 270, pi. 16, figs. 8, 9. 
These two species, from the Clinton of Lockport, New York, bear a close relation to 
some of the western forms and are occasionally identified as occurring in that area; I am 
therefore figuring the type specimens for comparison. 
Pisocrinus pilula De Koninck 
Plate 23, figs. i-6 
Bather, Crinoidea of Gotland, 1893, p. 27, for full synonymy. 
A series of figures of this protean species from the Wenlockian of Gotland and England 
is given for comparison with our P. campana. Also for comparison with other American 
species, P. olliila Angelin, figures 7-10; P. pocillmn Angelin, figures ii, iia ; both from 
Gotland and fully described in Bather’s work ; and two specimens of undescribed species 
from Dudley, England, figures 12, 12a and 13-14. 
