272 



Messrs. Foovcl and Crick on now and 



d'Orbigny *, but is distinguished by its narrower form, more 

 open umbilicus, and closer septa. 



Not feeling certain that the present species had not already 

 been described, we communicated with Dr. Paul Fischer, of the 

 Mus. d'Hist. Nat. Paris, enclosing woodcuts of this and of 

 another species described in the present paper under the 

 name of N. Fischeranus. Dr. Fischer has kindly replied to the 

 effect that he finds no form either in the Museum of Nat. Hist., 

 the Museum of the Ecole des Mines, or in that of the Sorbonne, 

 which can be identified with certainty with either of our 

 specimens. With regard to the form here called N. robustus, 

 he observes that it resembles perhaps some specimens of 

 Nautilus toarcensts, d'Orb., but that the umbilicus in the 

 latter appears more open and the aperture more dilated. 

 With these remarks we fully concur, and we are glad to have 

 the opinion of so experienced a palaeontologist as Dr. Fischer 

 in confirmation of our own. 



Horizon. Upper Lias. 



Localities. Moutiers, Courcy \ (Calvados), France. 



5. Nautilus Fischeranus, sp. nov. 

 Fig. 6. 



Nautilus Fischeranus. — a, lateral view, showing 1 the test with line lines of 

 growth and some of the sutures, where the shell is removed ; b, peri- 

 pheral view. Drawn from a specimen in the British Museum (no. 

 87007). Rather more than one third natural size. 



* Prodr. de Paleont. Stratigr. vol. i. p. 245, = ^. latidorsatus, d'Orb. 

 Pal. Franc., Terr. Jnrass. vol. i. p. 147, pi. xxiv. (not of Schlotheim). 

 t Courcy is a village about -!.l miles north-east of Falaise. 



