NODOSARIN^. 55 



Dextalina acuticosta, D. bifuecata, D. multiline ata, Bornemann, 1855. Zeits. 

 Deul. Geol. Ges., yol. vii, p. 325, pi. 13, figs. 9—12. 



— CBEBicosTATA, 2\euegehoren, 1856. Denks. Akad. Wisseu. JIath.-Natur. 



CI., vol. xii, p. 90, pi. 4, figs. 12, 13. 



— Lamakcki, Id. lb., p. 91, pi. 4, figs. 16 a, 1(3 i. 



— PKiMiEVA, Terquetn, 1858. Mem. Acad. Imp. Metz., 39 annee, p. 603, 



pi. 2, figs. 12 a, b. 



— sdbarcuata, var. jugosa (parte), Williamson, 1858. Rec. For. Gt. Br., 



p. 20, pi. 2, fig. 42. 

 NoDOSARiA rafhanls, Tar. OBLiQUA, Parker and Jones, 1859. Ann. Nat. Hist., ser. 3, 



vol. iv, p. 351. 

 Dentai.ixa JIaucki, Reuss, 1S60. Sitz. Akad. Wien., vol. si, p. 188, pi. 2, fig. 7. 



— polyphragma. Id. lb., p. 189, pi. 3, fig. 1. 



— KoxiNCKi, D. jiicROPTVCHA, D. AECUATA, Id. lb., vol. xlii, p. 356, &c., 



figs. 3 — 5. 



— coxFLVENS, Reuss, 1861- lb., vol. sliv, p. 335, pi. 7, fig. 5. 

 XoDOSARiA SIPJIUNCULOIDES, Costa (n. d.). Foram. Foss. Marne Terziar. Messina, 



p. 9, pi. 1, fig. 27. 

 Dextalixa Martixi, Terquetn, 1862. Mem. Acad. Imp. Jletz, 43 annce, p. 454, 

 pi. 6, fig. 14. 



— AcicULA, ParAsr and /ones, 1862. In Carpenter's Iiitrod., Append., p. 310. 



— LiNEATA, Reuss, 1864. Sitz. Akad. Wiss. Math.-Natur. CI., vol. 1, 1 Abtb., 



p. 22, pi. 4, fig. 11. 



— ACicuLA, Brady, 1864. Trans. Linn. Soc, vol. xxiv, p. 473. 



— ScHWARZii, Karrer, 1864. Sitzung. Akad. Wien., vol. 1, 1 Abtheil., p. 15, 



pi. l,fig. 5. 



— OBSCURA, Stache, 1865. jVovara-Exped., Geol. Theil, part 2, p. 208, 



pi. 22, fig. 37. 

 NoDOSARiA (Dextalixa) pcxgexs, Reuss, 1866. Denks. Akad. Wissen. Matb.-Natur. 



CI., vol. XXV, p. 19, pi. 2, fig. 16. 



Characters. — Shell elongated, arcuate, tapering ; composed of numerous (six to 

 fifteen) chambers, which are subcylindrical and more or less ventricose, with the septal 

 lines generally constiicted, and the surface covered with riblets, varying iu number and 

 size in different specimens. Length ^^th to ^ths inch. 



Dentalina obliqua may be regarded as the curved form of Nodomria raphanistrum. 

 Like the latter, it has usually a large number of chambers, and it is covered with similar 

 parallel longitudinal ribs, and under favorable circumstances it attains to similarly large 

 dimensions, the only difference being a more or less curved mode of growth. Some 

 specimens seem rather to be the curved forms of N. raphanus ; but there is little 

 or no real difference. The draight tapering variety of N. raphanistrum is N. acicula, 

 Lamarck. 



Mr. Searles Wood's specimens from Sutton are fine and numerous ; but we have not 

 obtained it from other Crag beds. It is not an uncommon form in the various Secondary 



