134 TWENTY-SEVENTH REPOKT ON THE STATE MUSEUM. 



and strongly lobed ; the ventro-lateral lobe broadly rounded 

 and shallow ; the dorso-lateral lobe deep and acutely rounded, 

 with a strong highly-arched lateral saddle between, extending 

 two-thirds the width of the volution ; dorsal saddles broad, 

 extending only about half as high as the lateral saddles, or 

 less, and marked by a very short, obtusely-pointed, or trun- 

 cate dorsal lobe between. 

 Surface unknown. 



This species differs from other American species known to 

 me in the general form, the character of the septa and size of 

 the umbilicus. * It is somewhat closely related to G. lamello- 

 sus Sanberger (Tab. viii, tig. lc. Verstein. des Rheinischen 

 Systems in Nassau), but differs from it in the smaller umbili- 

 cus and somewhat different septa. 



Formation and locality. — In the Chemung group, near 

 Ithaca, N. Y. 



GoNIATITES (CLYMENIA ?) NUNDAIA Hall. 



Goniatites sinuosus, in part. 

 Shell large, discoid ; volutions very much compressed later- 

 ally, with slightly convex sides and sharply rounded back ; 

 the outer volutions partially embracing the inner, leaving a 

 broad, shallow, open umbilicus, in which is exposed to view 

 from one-half to two-thirds of the entire width of the inner 

 volutions. Septa somewhat closely arranged, when measured 

 in the middle of the volution, from six to seven occupying a 

 space equal to the breadth of the volution where measured. 

 The septa are strongly marked by lobes and saddles ; of the 

 latter there are three in the breadth of the volution, the cen- 

 tral one nearly as wide as the other two, the lobes deep, 

 acutely pointed, the dorso-laterals much deeper and more 

 acute than the ventrals : the dorsal lobe deep, and divided in 

 the middle by a minute dorsal saddle. 



This species appears to possess the characters of both Gon- 

 iatites and Clymenia. having the general form of Clymenia, 

 while the more deeply lobed septa are intermediate in form 

 between those of the two genera in their typical forms. It 

 differs from G. (O.) complanatus of the Genesee slate and 

 Portage group by its much greater size and more deeply 

 marked lobes and saddles. The specimens are subject to 

 considerable variation from compression or other causes, 



