278 



Messrs. Foorcl and Crick on new and 



its distinguishing character. It is nearly allied to N. lineatus, 

 Sow., but differs therefrom in its more distant and flexuous 



Fig. 9. 



Nautilus pseudolineatus. — Lateral view of a specimen, showing the closed 

 umbilicus and several of the septa ; a indicates the anterior border 

 of the impression of the shell-muscle, s points to the last-formed sep- 

 tum. Drawn from a specimen in the British Museum (no. G97G7). 

 One third natural size. 



sutures, more concave septa, the position of its siphuncle, and 

 its slower rate of increase. 



Horizon. Inferior Oolite. 



Localities. Sherborne, Bridport, Burton- Bradstock, Dorset- 

 shire ; Yeovil, Somersetshire. A fine specimen — a section 

 (no. C. 324 b) — is also recorded from Somersetshire, but from 

 what place in that county is not known. Two specimens, 

 numbered respectively 43854 (" Sowerby Coll.") and C. 2942, 

 have no locality recorded against them in the register. 



9. Nautilus glaber, sp. no v. 



Sp. char. Shell completely involute, slowly increasing in 

 diameter, compressed laterally, flattened on the periphery. 

 Whorls wider than high, widest just above the umbilical 

 region. Umbilicus completely closed. Septa moderately 

 distant, shallowly concave ; the sutures strongly bent back- 

 wards on the sides and very slightly sinuated upon the peri- 

 phery. Siphuncle situated markedly above the centre. Sur- 

 face of the test quite smooth. Body-chamber unknown. 

 The larger specimen of the two representing this species in 



