Foraminifera from the Coast of Norway. 28 1 



Dentalina hreois, D'Orb. Foram. Foss. Bass. Vienne, p. 48. pi. 2. f. 9, 10. 

 Glandulina cylindrica, G. ovalis, and G. subconica, Alth, Haidinger's Ab- 



handl. iii. p. 270. pi. 13. f. 30, 31, 32. 

 Glandulina pygmcea, G. manifesta, G. cylindracea, Nodosaria proboscidea, 



Dentalina marginuloides, Reuss, Ilaid. Abh. iv. p. 22. pi. 2. f. 3-6, 12. 

 Glandulina discreta, Reuss, Denksch. k. Akad. Wiss. Wien, i. p. 366. pi. 



46. f. 3. 

 Glandulina concinna, Reuss, Zeitschrift Deutsch. Geol. Gesell. vii. p. 263. 



pi. 8. f. 1. 

 Glandulina injlata, G. laevigata, G. elongata, Bornemann, i6. p. 320. pi. 12. 



f. 6-9. 



Shell smooth and hyaline ; varying from acutely pyriforra and 

 spindle-shaped to subcylindrical and pupa-like ; usually circular 

 in cross-section, but sometimes slightly oval ; formed of about six 

 chambers in a single row, closely fitting and somewhat overlapping 

 each other; chambers usually rapidly increasing in size after 

 the early ones (fig. 6), but sometimes the later chambers retain 

 a nearly uniform width (fig. 9), in which case the sutures are 

 more or less constricted. A slight variation from a straight line 

 in the long axis of the shell is occasionally observable (fig. 9, 

 Dentalina brevis, D'Orb.). Aperture small, central, either round 

 or slightly oval and transverse (fig. 7), somewhat projecting, 

 and surrounded by about thirty radiating fissures, more or less 

 distinct. 



About thirteen specimens, exhibiting several variations of 

 form, were dredged from a muddy bottom at 160 fathoms, 

 within the Arctic Circle (Finmark). 



This Nodosaria has been found in the tertiaries of Italy and 

 Austria; it abounds in the London Clay, presenting several of 

 the intermediate forms connecting figs. 6 and 9. It is common 

 also in the Low'er Chalk of Kent and Germany; and is one of 

 the most common Foraminifera in the Kimmeridge Clay near 

 Aylesbury, and in the Lias of Gottingen* and of Ilminsterf. 



Nod. IcBvigata lives in the Adriatic. We have not yet found 

 this species recent elsewhere than in these Norway dredgings, 

 where it is larger than the fossil specimens above referred to. 



The compressed pupa-like variety of this " Nodosaria," pass- 

 ing into '* Lingulina," may be compared with the Lingulince of 



by Bornemann {loc cit.), which are evidently of the same specific type as 

 the smooth, and present a steady gradation in the setting-on of the riblets, 

 5, 6, 7, 8, 9, 11, in individual Nodosarice which have nothing essentially 

 characteristic in shape, size, or structure, to enhance the trivial value of 

 this ornamentation. In Bornemann's figs. 19 & 21 (pi. 3, loc. cit.) there 

 are smooth Linguline forms, nearly related, on the one hand, to the above- 

 mentioned Nodo,<iaria, and on the other, to the smooth and the ribbed 

 FrondicularicB figured on the same plate. See also the ribbed Linguline 

 form of JV. Icevignta (L costafn, D'Orb.), j)l 3. f. 1-5, Foss. Fomm. Vien. 

 * Bornemann, op. cit. t Mr. (J. Moore's Collection. 



