444 THE CRINOIDEA CAMERATA OF NORTH AMERICA. 
Lobocrinus inflatus (Rowney and Hare). 
Plate XXXIV. Figs. 18, a, 6. 
1891. Batocrinus inflatus —Row.Ey and Harz; Kansas City Scient., p. 102, Plate 2, Fig. 19. 4 
Syn. Batocrinus bulbosus — RowiEy and Hare; ibid., p. 114, Plate 3, Fig. 5. © 
Calyx about as high as wide, small, subglobose, slightly flattened at the 
anal side. Dorsal cup more than twice as high as the ventral disk, deep 
bowl-shaped; the plates heavy, almost flat and devoid of ornamentation ; 
the suture lines somewhat grooved. 
Basals a little projecting, forming a low cup with a shallow concavity 
at the bottom. Radials wider than long, as large as both costals together. 
oO? 
First costal quadrangular, small, wider than high. The second costal gener- 
ally heptangular, considerably larger than the first, wider as well as longer. 
Distichals two, rather large, those of the anterior ray, and the outer ones of 
the posterior rays, supporting directly the arms; while the inner ones bear a 
palmar on each side. The anterior rays of the type specimen are abnormal ; 
| the ray to the right is formed like the anterior one, and has but two arms, 
} di 7 that to the left supports palmars on both distichals, and has four arms.* 
Arm facets somewhat projecting and deeply concave; they point slightly 
eee 
upwards, and are arranged in groups. Interspaces between the rays wider 
8 
| 1 than those between the main divisions of the rays, and considerably wider 
a than the spaces between arms of the same division. There are no respira- 
= tory pores near the arm openings. Arm structure unknown. Regular inter- 
f we 
| Bt 3) brachials: 1, 2,2; the first very large, as wide as high; the two upper ones 
| interposed between the arm-bearing pieces, and followed by disk plates. The 
A). anal plate supports: 3, 3, 2, and one plate, the latter being designated more 
| | properly as a plate of the disk. Ventral disk small, the anal tube occupying 
| almost one third of its diameter; the plates nodose, and of nearly uniform 
size, even the orals cannot be distinguished. Anal tube heavy at the base 
LA | 
i) and central. 
: : y | Horizon and Locality. — Lower part of the Lower Burlington limestone, 
\ Louisiana, Mo. 
Types in the collection of Mr. R. R. Rowley. 
* In another fragmentary specimen in Mr. Rowley’s collection, the right antero-lateral ray, the only 
i - one seen, has three arm openings, one above the distichals, the two others above a palmar. This is probably 
i | the normal arrangement, and there are fourteen arms to the species. The type of B. dulbusus curiously also 
Ai has but two arms to the right and four to the left. 
