Eathbun.] 16 [May 15, 



to science. The faunae of the two series of deposits — the Erere 

 on the one hand, and the Maecuru and Curud on the other — are 

 closely related, but I will leave the discussion of this subject for the 

 close of the paper. 



The collections of the Morgan Expeditions referred to in the fol- 

 lowing pages are contained in the Museum of Cornell University, Ith- 

 aca, New York; those of the Geological Commission of Brazil are at 

 present deposited in the National Museum at Rio de Janeiro. Fig- 

 ures of many of the new species described in this paper were execut- 

 ed at Rio de Janeiro a year ago, and will probably be published in 

 some future work of the Geological Commission. 

 Lingula spatulata (?) Hall. 



Lingula spatulata Hall and Vanuxem, Geol. Repts., Third and 

 Fourth Geol. Dists. N. Y., 1842 and '43; Hall, Pal^ont. of N. Y., iv, 

 13, 1867. Lingula spatulata (V) Rathbun, Bull. Buffalo Soc. Nat. Sci., 

 I, no. 4, 258, fig. 1, 1874. 



Only a single specimen of this species has been obtained from the 

 Devonian of Brazil. Sandstone, Erere, Prov. of Pard, Brazil. 

 (Morgan Expedition, 1871.) 

 Lingula ererensis, sp. nov. 



Shell of medium size, about two-thirds as wide as long, subelliptical 

 in outline, and broadest near the middle; lateral margins nearly 

 straight along the middle, but curving very slightly; anterior and pos- 

 terior margins rounded, the former apparently the broader, and very 

 regularly and strongly curved. Valves moderately convex, with a 

 tendency to form a more or less defined median ridge near the beak. 

 Surface marked with very fine, regular, closely-set concentric lines, 

 which are only distinctly seen by the aid of a lense. In the interior 

 of one valve exists a narrow V-shaped impression, having the point 

 turned toward, and ending near, the beak. Length of the shell 

 about 18 ram., breadth about 12 mm. 



This species of Lingula is quite distinct from any of the other 

 forms at Erere. In outline it approaches L. delia Hall, of the Ham- 

 ilton group of New York State, and like that species it has the fine 

 concentric surface lines. The single specimen found is, however, too 

 imperfect to permit of its relations to the above mentioned species 

 being accurately determined. 



Associated with SpiriJ'era Pedroana, etc., in the Devonian sand- 

 stone of Erere. (Geological Commission, 1876.) 



