196 
SMITHSONIAN INSTITUTION 
PLATE 12 
(Figures natural size unless otherwise stated) page 
Hapalocrinus cirrifer new species 52 
Figs. 1, 2, 3, 4. Four specimens with long and narrow arms, profuse pinnules, and long cirri. In 
fig. 4 the arms are extremely slender; the structure of the calyx is obscure, there 
being an abnormally enlarged anal opening. Figs, i, 2, 4, X 3/2; fig. 3) natural size. 
Fig. 5 . 
Hapalocrinus pinnulatus new species 
Crown with strong arms and pinnules, but much smaller and more conical calyx than the 
preceding. X 2. 
52 
Hapalocrinus tuberculatus new species 53 
Fig. 6. Crown with arms and pinnules similar to the preceding, but calyx rotund and with tubercu- 
lar surface. X 2. 
Hapalocrinus tenness'eensis new species 53 
Fig. 7. Crown much displaced, with uniserial arms, quadrangular brachials, long stem and cirri. 
X 3/2. 
Figs. 1-7. Beech River formation; Decatur County, Tennessee. 
Hapalocrinus devonicus new species 53 
Fig. 8. Crown with uniserial arms, 3 in some rays, quadrangular brachials, very strong stem and 
cirri, and tubercular surface. 
Helderbergian ; Keyser, West Virginia. 
Brahmacrinus elongatus new species 53 
Two calices showing brachial series of first two orders incorporated in calyx by 
secundibrachs in two ranges, and extremely large BB. X 2. 
Two detached bases, from side view. X 2. 
15. Three bases from dorsal side, showing 3 equal basals, sharply excavate cavity, and 
minute axial opening. X 2. 
Laurel limestone; St. Paul, Indiana. 
Nyctocrinus magnitubus new genus and species 54 
Figs. 16, i6a. Complete crown with spiniferous anal tube rising above the branching, biserial arms; 
views from opposite sides; fig. 16 from post, interradius, the plate being somewhat 
larger than in other areas. 
17. A similar specimen, from r. post, radius. 
18. i8a. Opposite views of a larger crown, showing part of tube at the top. 
19. A smaller specimen, with base of tube exposed. 
20. Dorsal view of detached calyx, showing broad, shallow basal cavity, with 5 IBB at 
bottom. 
21. Another detached base seen from the interior, with infrabasal cone plainly shown. 
Beech River formation ; Decatur County, Tennessee. 
Figs. 9, 10. 
II, 12. 
13, 14, 
