NORTH-CAROLINA GEOLOGICAL SURVEY. 205 



species ; so that it does not follow that where the bone is 

 small the spieces must be small also. 



I propose the name Boblaena Mysticetoides for their species. 



The thick, the posterior end, is nearly equally bisected by 



the thin expanded part, and around it there is a deep sinuous 



indentation which, on the inside, is continuous with the 



channel between the thick and thin parts. 



F IG . 27. The otololite, next in size to 



the B misticetoides, differs much 

 from it in form and proportion 

 of parts. The thick convex part 

 is well defined, but rough, short 

 and prominent. It rises higher 

 than the base of the thin invo- 

 luted part to which it slopes all round. It is marked with 

 two or three strong folds, one of which is at or near its termi- 

 nation forward, and another beneath, which gives a slight 

 emargination to the bone. It is separated from the anterior end 

 by a flattened plane about half an inch wide, where their 

 expanded part turns and forms a rather open hook, unlike that 

 of the former, which is bent much more inwards. The pos- 

 terior end is somewhat obliquely truncate, and at the root of 

 the thin part there is a rough indentation disconnected with 

 the wide channel within. The anterior border of the thin 

 part forms an arch much less extended than the former, and 

 the posterior and basal part is flattened and angular. Length 

 3J inches ; widest part 1-J-. 



Another specimen measuring four inches long preserves 

 the essential characters of the foregoing. It is very rugose 

 around the thick convex part, and the middle fold creates a 

 slight twolobed character to the interior part and its base. 

 The smallest (Fig. 28) has a well-defined convex part, which 

 FIG. 28. i g smooth though somewhat wrinkled 



but rough within, and the border rises 

 almost immediately from it, especial- 

 ly posteriorly. The space between 

 the border and convex part widens 

 anteriorly where it is only gently 



