120 Morgan Expeditions. 



Abundant in the Devonian sandstone of Ere re, Prov. of 

 Para, Brazil, with Spirifera Pedwana, Strepiorhynchus 

 Agassizii, etc. 



Nuculites Ererensis, sp. nov. 



Shell small, elongate, nearly twice as long as high, sub-elliptical in 

 outline, the margins forming quite a regular elliptical curve, broken by 

 the slight upward extension of the beaks. Dorsal margin oblique and 

 nearly straight. Beaks situated about one-third the length from the 

 anterior margin, small, only slightly incurved, and apparently not reach- 

 ing to the hinge line. The convexity of the valves is moderate, being 

 greatest just below the umbonal region. The septum extends downwards 

 for about three-fifths the height of the valves, and intersects the antero- 

 posterior diameter at a little less than one-third its length from the front. 

 Length, 13 mm ; height, 8 mm ; depth of single valve, nearly 3 mm . 



This species of JVucidiles is readily distinguished from 

 the last one above described, JST. JVyssa of Hall, by its 

 elongate form and nearly elliptical outline, and by the 

 absence of any flattening along the middle. Only two 

 specimens have yet been obtained. These are both inter- 

 nal moulds of the left valve, and the surface markings are 

 not preserved upon them. 



Found, with Spirifera Pedroana, etc., in the Devonian 

 sandstone of Erere, Prov. of Para, Brazil. 



Genus GRAMMYSIA, De Verneuil. 

 Grammy sia (Pholadella?) parallela. 



Grammysia parallela, Hall. Lamell. Shells of the U. Held., Ham. and 

 Chem. Groups, etc., 18G0. (Preparatory for the Paleontology of N. Y.) 



Shell small, elongate, about two-thirds as high as long, with the greatest 

 height at the beaks. Valves moderately convex, the surface arching 

 strongly from the beaks to the ventral margin, but being rather more ab- 

 ruptly curved in the upper portion. The beaks are situated at about one- 

 fourth or one-fifth the length of the shell from the anterior extremity, and 

 project but little above the hinge margin; they are small, rather strongly 

 arcuate and turned somewhat abruptly forward, with the apices acute and 

 contiguous. Dorsal margin straight and extending directly backward. 

 The anterior margin extends obliquely forward in its upper half, forming 

 at the beaks an angle of about 135° with the dorsal margin, and is slightly 



