PLATE 13. 



Fig. 1. 86. 1. LlTUITES UNDATUS. ( P^g- 52.) 



1. Lateral view of a specimen. A part of the last volution, near tlie aperture, is broken otV. 



1 a Lateral view of the cast of a smaller specimen I h. Dorsal view of the same. 



Fig. 2. 87. 1. LlTUITES coNvoLVANs? (Pag, 5.3.) 



2. A portion of a cast, showing the septa and part of the outer chamber. 



2 a. A vertical section of another individual as seen on the weathered surface of the limestone, showing the 



septa, which are removed from the smaller extremity by weathering. The cast is worn down below the 

 siphuncle. which has not been observed in any specimen yet seen. 



Fig. 3, 86. 1. LiTTTiTEs UNDATUS. (Pag. 62.) 



A section apparently of this fossil, though the surface markings are not preserved. The septa are distinctly 

 shown in a portion of the shell, and the dorsal siphon at two points a, o. 



