170 PSEUDOCERATITES OF THE CRETACEOUS. 
D. S. Martin and came from Grayson, Tex. The sutures on the right side 
possess a decidedly unique aspect, having a first lateral saddle entirely 
different from that of any specimen of this genus | have yet studied or seen 
figured. The whole aspect of these sutures indicates a new species, whereas 
the sutures on the other side, although considerably abraded, are perfect 
enough in places to show the ordinary form of first lateral saudle commonly 
found in Metengonoceras. The sutures of the right side are more like those 
of EF. subjectum than those of E. pierdenale, but they are quite distinct from 
both in the aspects of the saddles. On the right side there are nine saddles 
and eight lobes. The first lateral saddle is broad and distinetly trifid. The 
inner arm is broad and has the usual shape of other species, being pointed 
externally and running well on to the venter. The central arm is a narrow, 
small marginal saddle between two small entire marginal lobes; the mner 
arm is narrower than the outer arm and phylliform. The second to the 
fourth saddle are entire and phylliform, the fifth and remaining saddles 
have flatter bases. The fifth is still entire and the remaining saddles also, 
except the sixth, which is bread and bifid. his bifid character can be 
detected only on the first part of the outer volution where the dividing lobes 
are not abraded, but even this is open to some doubt. 
The ventral lobe has the usual outline and is symmetrical in position; 
nevertheless the first lateral saddles on the left side are quite distinct from 
those on the right side. They have the usual bifid character of specimens 
of other species, and there is nothing unusual in the outlines of the sutures 
on this side. The seventh and eighth saddles are bifid, and the sixth is 
entire. The ninth saddle is broader than on the right side. The condition 
of the sutures on this side did not admit of more minute observations. The 
first to the fourth lobes on the right side were of the usual form, but rather 
coarsely serrated and similar to those of specimens from Bell County, 
Tex., described above (collection of the Boston Society of Natural History, 
No. 10755). It agreed also with the last im the prominence of the middle 
line of tubercles. 
Locality: Grayson, Tex. 
Similar sutures occur in a cast of this species kindly loaned me by 
Prof. F. W. Cragin, and in this the eighth saddles are on the umbilical 
shoulders and the broad ninth reaches to the line of involution; the second 
to the sixth saddles are entire; the seventh to the ninth are bifid. 
Locality: Tarrant County, Tex. 
