Morgan Expeditions. 117 



feet specimens, preserving the shell, may show it to be dis- 

 tinct from that species. 



From the Devonian sandstone of Erere, Prov. of Para., 

 Brazil ; associated with Spirifera Pedroana, etc. 



Genus BELLEROPHON, Montfort. 

 Bellerophon Morganianus., sp. nov. 



Shell of small to medium size, subglobose, with the umbilical openings 

 small but rather deep. Body volution generally somewhat broadly flat- 

 tened along the back, sometimes moderately rounded and curving abruptly 

 to the umbilicus. It increases rapidly in size toward the aperture, where 

 it expands quite abruptly, making the aperture large and apparently 

 transversely sub-elliptical in outline. Surface covered with minute, 

 rounded, transverse, parallel, raised lines, which first curve slightly for- 

 ward from an indistinct, median dorsal band, and then extend nearly 

 directly to the edge of the umbilical openings. Of a nearly perfect speci- 

 men of medium size, the greatest length from the outer edge of the aperture 

 is about 17 mm ; sinistro-dextral diameter of aperture of same specimen, 

 about 19 ""». 



This Brazilian species of Bellerophon appears tb be closely 

 related to B. leda of Hall, Hamilton group, New York, and 

 is of about the same size as that species. The body volu- 

 tion of B. Morganianns is, however, generally larger where 

 it commences than is the case in B. leda, and the revolving 

 raised lines are entirely wanting in the former species. 



Obtained in great abundance from the Devonian sandstone 

 of Erere, Prov. of Para, Brazil ; associated with Spirifera 

 Pedroana, etc. 



Dedicated respectfully to Mr. Edwin B. Morgan, of 

 Aurora, N. Y. 



Bellerophon Coutinhoanus, sp. nov. 



Shell rather small, subglobose, trilobed. The outer volution increases 

 rapidly toward the aperture, and is divided into three longitudinal lobes, 

 of which the middle or dorsal lobe is about two-thirds the width of the 

 whorl itself, and is prominent, sharply defined at its margins and very 

 regularly rounded. The lateral lobes curve regularly and quite abruptly 

 from the dorsal lobe to the umbilical openings. Size of the most perfect 

 specimen, which is not, however, the largest one obtained: greatest 

 length from near the outer edge of the aperture, about 15 mm ; width of 

 the outer volution near the aperture, nearly 15 mm . 



