280 



Messrs. Foord and Crick on new and 



1845. Nautilus obesus, Murchison, Outline of the Geology of the Neigh- 

 bourhood of Cheltenham, new ed. p. 80. 



1852. Nautilus obesus, Giebel, Fauna der Vorwelt, Band iii. Abth. i. 

 p. U>r>. 



1854. Nautilus obesus, Morris, Cat. British Fossils, 2nd ed. p. 307. 



1857. Nautilus obesus, Etheridge, iu Mem. Geol. Surv. Great Britain ; 

 Hull, On the Geology of the Country around Cheltenham, p. 48. 



1860. Nautilus obesus, Wright, Quart. Journ. Geol. Soc. vol. xvi. p. 40. 



1871. Nautilus obesus, Phillips, Geology of Oxford and the Valley of 

 the Thames, p. 104. 



1873. Nautilus obesus, Sharp, Quart. Journ. Geol. Soc. vol. xxix. 

 pp. 294, 299. 



1879. Nautilus obesus, Stoddart, Proceed. Bristol Naturalists' Soc. 

 vol. ii. pt. iii. p. 279. 



1888. Nautilus obesus, Beehy Thompson, The Middle Lias of North- 

 amptonshire, p. 54. 



Fi<?. 11. 



Nautilus obesus. — a, lateral view of a cast, showing the septa and the open 

 umbilicus ; b, front view, showing the position of the siphuncle. 

 Brawn from a specimen in the British Museum (no. 39023). Rather 

 more than one third natural size. 



Sj). char. u Gibbose, urnbilicate, plain ; back broad, flat ; 

 mouth large, squarish ; septa very numerous, not recurved ; 

 siphuncle nearly central. . . . Thickness about three fourths 

 the diameter. The mouth is large, being two thirds the 

 diameter long. The septa are very numerous ; their angles 

 not being recurved gives a very open form to the umbilicus. 

 The siphuncle is transversely oval." (Sowerbi/.) 



Remarks. We may add to this description that there is a 

 specimen in the Woodwardian Museum from Bridport, Dor- 

 setshire, on which the test remains ; it is marked only with 

 lines of growth. This shell is 4 inches in diameter. 



This species appears to be most nearly allied to Nautilus 



