120 SvSTKilATIC P.VLKOXTOLOGY — ]\IlDDLE DeVOMAX 



Comparatively few rather small spt'eiinens of this speeies have been 

 found in ]\Iarvlan(l. The longest one in the State Collection, from 

 which the tip is gone, is 23 nnn., with a greatest width, as crushed, of 

 14 mm. The specimens have conspicuous costal ridges on the exterior, 

 as in figures of this species ; the longer septa reach the center where 

 they are slightly twisted, and a pseudoeolumella is also shown at the 

 center. 



Occurrence. — Eomney Formation, Hamilton Member. Emstville; 

 east bank of Evitts Creek below Wolfe Mill. 



Collections. — Maryland Geological Survey; New York State Museum '; 

 American Museum of Natural History.^ 



Genus AMPLEXUS Sowerby 



Cf. Amflexus hamiltoniae Hall 



Plate YII, Fig. 2 



Aynplexus hamiltoniae Hall, 1876, 111. Devonian fossils, pi. xix. 



Amplexus hamiltoniae Grabau, 1899, Bull. Buffalo Soc. Nat. Sciences, vol. vi, 



p. 124, fig. 5. 

 Amplexus hamiltoniae Grabau and Shimer, 1906, N. Am. Index Fossils, vol. 1, 



p. 59, fig. 86. 



Description. — Amplexus hamiltoniae has been described as follows: 

 " [Corallum] elongated cylindrical, gently tapering form, often abruptly 

 bent at the base ; strongly wrinkled epitheca ; comparatively slight develo]v 

 meut of septa; well developed tabulae, bent down near the thin wall." 

 Grabau, 1S99. 



The single specimen in the Maryland collection is elongated, tapering 

 toward the base near which it is abruptly contracted ; bent near the 

 middle and the epitheca is strongly wrinkled. 



' This and the following species credited to this Museum are listed in the 

 " Catalogue of type specimens of Paleozoic fossils in New York State Museum "; 

 New York State Museum, Bulletin 6-5, 1903. 



-This and the following species credited to this Museum are listed in the 

 " Catalogue of the types and figured specimens in the Palseontological Collection 

 of the Geological Department, American Museum of Natural History "; Bulletin 

 of the American Museum of Natural History, vol. xi, 1900, pp. 189-357. 



