On Microzoa, &c. By C. D. Sherbom & F. Chapman. 749 



Nodosaria raphanus (Linne), plate XIV. fig. 36. Nautilus 

 raphanus Linne, 1767, Syst. Nat., 12th ed., p. 1164, No. 283 ; 

 1783, ibid., 13th (Gmelin's) ed., p. 3372, No. 16.— A very 

 characteristic specimen of this type form. Sowerby figures a 

 similar example from the Hampstead well in Wetherell's paper 

 (op. cit.). One specimen ; black clay. 



Nodosaria raphanus (Linne) var., plate XIV. fig. 37. — An 

 elongated variety of the last mentioned. One specimen ; black clay. 



Nodosaria raphanistrum (Linne), plate XIV. fig. 38. 

 Nautilus raphanistrum Linne, 1767, Syst. Nat., 12th ed., p. 1163, 

 No. 282. — Poor, thin and irregular, broken at lower end. H. B. 

 Brady in ' Somerset Proceedings, &c.,' 1865-6, plate i. fig. 7, 

 figures N. raphanistrum from the Lias, and this much resembles 

 our specimen. One of Eeuss' figures of N. subornata (Sitz. k. Ak. 

 Wiss. Wien, lii. 1865, plate i. fig. 10) comes close to this form, and 

 Bentalina nodosa d'O., as figured by Vanden Broeck in Ann. 

 Soc. Beige Micr., ii. 1876, plate ii. fig. 10, represents the curved 

 and tapering variety, D. acicula (Lam.). Parker and Jones 

 (1859, A. M. N. H., ser. 3, iii. p. 478) state that " Mr. Hanley 

 has satisfactorily determined the Nodosaria denominated raphanis- 

 trum by Linneeus, and has figured it in the Ipsa Linn. Conch., 

 plate v. fig. 4. This proves to be the Nodosaria bacillum of 

 Defrance (Diet. Sci. Nat.) and the N. sequalis 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 Ledermuller's plate iv. fig. x. posterior, as the 

 best published representation. This, though a dwarfish form, 

 serves to link N. raphanus with N. raphanistrum!' These 

 remarks are illustrated by our figures in plate XIV., where the 

 gradations between the several varieties of this interesting Noso- 

 daria can be readily recognized. Fig. 38 is equivalent to one 

 of Ledermuller examples, though longer and more slender; and 

 Ledermuller's other figure, quoted by Linne, is thicker and more 

 like the common N. raphanus. One specimen ; black clay. 



Nodosaria polygona Eeuss, plate XV. figs. 2a, b ; 3a, b; 4a, b. 

 Eeuss, 1855, Z. d. geol. Ges., vii. p. 266, plate viii. fig. 7. — A many- 

 chambered form, commencing with a swollen chamber and grow- 

 ing upwards regularly and increasingly for some distance, then 

 assuming the characters of N. bacillum Defrance or N. raphanus 

 (Linne). In transverse section in the lower part of the shell we 

 see eight sharply angular ribs. Eeuss' figure exhibits the pecu- 

 liarities of the form perfectly, and in his description he has fully 

 recognized its affinities to N. bacillum Defr. and N. affinis d'Orb. 

 We figure a specimen of the early chambers (fig. 4), and one 

 (fig. 3) showing the relation of the shell to N. raphanus. Five 

 imperfect specimens, Stanley Eailway Bridge, Chelsea. 



