182 THE DEVONIAN OF MISSOURI. 



Order Cryptostomata 



Family Fenestellidae 



Genus Fenestella Lonsdale 



Fenestella ? sp. 



Plate 44, figure 8 



Description — The specimen is a silicified fragment of a zoarium which shows only 

 the non-celluliferous surface. 



CLASS BRACHIOPODA* 



Order Neotremata 

 Superf amily Craniacea 



Family Craniidae 

 Genus- Crania Betzius 



Crania alsopi n. sp. 



Plate 44, figures 9-11 



Description — Dorsal valve prominently elevated; surface ornamented with radiat- 

 ing costae, that increase toward margin, crossed by concentric growth lines. One speci- 

 men with diameter of about 7 mm. has about 112 radiating costae at margin. 



Remarks — The relation between the diameter of the dorsal valve and the number of 

 radiating costae is determinable on but one of the two specimens (attached to a specimen 

 of Meristetta atoka) observed. 



Order Protremata 



Sub Orthacea 



Family Orthidae 



Genus Dalmanella Hall and Clarke 



Dalmanella planoccnvexa (Hall) 



Plate 44, figures 12-17 



Orthis planoccnvexa Hall, 1859, Pal. N. Y., vol. Ill, p. 168, pi. XII, figs. 1-6, 1861. 

 Dalmanella planoccnvexa Hall and Clarke, 1892, Pal. N. Y., vol. VIII, pt. 1, pp. 207, 



224. 

 Dalmanella planoconvcxa Clarke, 1909, N. Y. State Mus., mem. 9, pt. 2, p. 145. 

 Dalmanella planiconvexa Schuchert, 1913, Md. Geol. Surv., L. Dev., p. 298, pi. LIV, 



figs. 1-6. 



Description — "Shell plano-convex; outline somewhat circular or transversely oval; 

 length and breadth about as ten to twelve. Dorsal valve nearly flat, slightly prominent 

 near the beak on either side of the faint central depression, and quite flat towards the 

 margins. Ventral valve convex, sometimes scarcely subangular towards the beak; 

 greatest convexity a little above the middle of the shell, and thence sloping uniformly 

 to the lateral and basal margins; beak small, acute, incurved. Area linear, its length 



•For each species, the range in size of the shells is indicated by the figured specimens. 



