478 Messrs. W. K. Parker and T. R. Jones on the 



nioniliform to the fusiform and the cyhndrical, from the sulcated 

 to the many-ribbed, and from the straight to the curved, — show- 

 ing, in this last circumstance, that N. ohliquus, above referred 

 to, is also one of the same variable group. Nautilus Fascia (1164. 

 286) is also a straight Nodosaria (figured by Gualtieri) with rib- 

 lets, but possessing raised seams around the shell at the sutures 

 of the chambers — a character that does not remove it from its 

 congeners, this limbation or raised condition of the septal lines 

 being an ordinary condition among the Nodosarince and other 

 groups of Foraminifera, dependent on exogenous shell-growth, 

 and not of specific value. Nautilus Granum (1164. 284) appears, 

 from Linnets description, to be a short, straight, and ribbed 

 Nodosaria, with oblique aperture, and thus represents a very 

 common form of Nodosaria passing into the so-called GlanduUna. 

 Shells constructed similarly to the foregoing, but smooth, or 

 nearly so, are named Nodosaria Radicula (Linn.) and N. dentalina 

 (Lam.) ; and some compressed forms with obliquely-set chambers 

 constitute the variety N. Legumen (Linn.). 



The ribbed Nodosarice {N, obliqua, N. Raphanistrum, N. Ra- 

 phanus, N Fascia, and N. Granum) and those destitute of orna- 

 ment are only modifications of one variety, well typified by N. 

 Raphanus, into or from which all the others may be traced, 

 whether short and tapering or long and cylindrical, flattened, or 

 subcylindrical, or like the well-grown Nodosaria Raphanistrum. 

 In company with A^. Raphanistrum we always find (as, for 

 instance, in the tertiary sandy clays of Turin and Malaga) an 

 immense variety of the foi*ms above enumerated ; and although 

 N. Raphanistrum stands pre-eminently as the best-grown and 

 most symmetrical, yet, on the principle which we intend to follow, 

 of letting the published trivial names of the Foraminife7'a remain 

 as indicative of the species, subspecies, and varieties intended by 

 the authors who established them, and of adopting for the names 

 of leading species and subspecies the appellations already given 

 to the forms best exhibiting the typical characters (being therein 

 guided by chronological circumstances when synonyms exist), 

 we here adopt as the name of the subspecies Nodosaria that 

 which Linn sens gave to the variety which best combines all the 

 characters of the group. 



Mr. Hanley has satisfactorily determined the Nodosaria de- 

 nominated Raphanistrum by Linnceus, and has figured it in the 

 ' Ipsa Linn. Conch.' pi. 5. f. 4. This proves to be the Nodosaria 

 Bacillum of Defrance (Diet. Sc. Nat.) and the N. (equalis of 

 Sowerby ('Genera' and 'Manual'). It was published in the 

 10th edition of the ' Syst. Nat.' without any reference to a figure ; 

 but in the 12th edition Linne referred to Ledermiiller's pi. 4. f. x 

 posterior, as the best published representation. This, though a 

 dwarfish form, serves to link N. Raphanus with N. Raphanistrum. 



