80 TRANS. OF THE ACAD. OF SCIENCE. 
Poreriocrtnus Missovriensis. (Shumard.)} 
Geol. Surv. of Missouri, 2 Rep., Part 
g. 3.) 2 
Synonym.—Poteriocrinus LONGIDACTYLUS. Ib., 
iL., p. 188, pl. B, fig. 5, a—c. (Non Austin Crinoid, pl. 11, fi 
the European species, it becomes necessary to give it a new name. 
I therefore propose, now, to designate it as P. Missouriensis. 
EXPLANATION OF PLATE I. 
Fig. 1. Dicnocrinvs corxterrus, specimen four times enlarged. 
a. View of the anterior, side. 
b. View of the anal side, showing the large anal piece surmounted by the 
smaller ones, and the anal opening. 
ec. Basal view. 
Fig. 2. Dicaocrints smmpLex, specimen natural size. 
a. View of the anal side. 
b. B jew. 
Fig. 3. Dichocrixus sex-Lonatus, specimen natural size. 
Fig. 4. Actixccrtyus Yanpewtr, specimens of the natural size, from Button Moald 
Knob, near Louisville, Kentneky. 
a. Profile view of an individual, with the proboscis attached. 
b, 1 view cf another example. as 
¢. Structure of the calyx of same, exhibiting the disposition and form of the 
Jan different species, a 
Fig. 5. Acrrvoceixvs MULTIRADTATUS, specimen from Quiney, Illinois, natural size, 
‘Fig. 6. Homo rinvs L 
__ -@ Specimen from Richmond, Indiana, natural size, partially restored. 
%. Anal view of a specimen from Oxford, Ohio, enlarged. 
4 
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IX. Belcher & Brother’s Artesian Well. By A. Litt0y, 
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