412 



Length of the largest head seen, five lines and a half; width of glabella 

 at neck segment, six lines, and at two lines from the front, three lines and 

 a half. Surface smooth. 



Dedicated to Professor J. M. Safford, State Geologist of Tennessee. 



In Limestone, No. 2. 



Bathyurus oblongus. (N. sp.) 



Fig. 394. 



Description. — The glabella of this species is oblong, convex with nearly 

 parallel sides, well separated from the cheeks by the deep dorsal furrow, 

 the front rounded, and the neck furrow rather deep all across. The eyes 

 are small, situated a little behind the mid-length of the glabella, and 

 distant from the dorsal groove a little less than one half the width of the 

 neck segment. The marginal rim of the head is the same as in B. 

 Saffordi. Surface smooth. Length of glabella four lines ; width three 

 lines. 



Limestone, No. 2. 



Bathyurus Cordai. (N. sp.) 



Fig. 395. 



Description. — Glabella conical, with a deep sulcus all round ; in front 

 an elevated rim apparently fonning a rostrum similar to that of some 

 species of Calymene ; just within the rim a deep groove, between which 

 and the furrow that surrounds the glabella, there is a rounded ridge. Neck 

 furrow Avell defined all across. Eyes apparently about opposite the middle 

 of the glabella. Surface smooth. 



The glabella in some of the specimens is more narrowed towards the front 

 than it is in the specimen figured. 



Length of the largest head seen, seven lines ; length of glabella, five 

 lines; width just in front of neck furrow, three fines and two-thirds; at 

 one line from the front, three lines. 



Limestone, No 2. 



Bathyurus quadratus. (N. sp.) 



Fig. 39G. 



Description. — Glabella oblong, convex, only slightly rounded in front, 

 well defined all round by the dorsal furrows, the sides straight and 

 parallel, the eyes are small, and situated as in B. ohlongus, an ocular 

 rid^^e obscurely visible in one specimen. Neck furrow well defined all 

 across. 



Length of glabella four lines ; width three lines and a half. 



Limestone, No. 2. 



