280 Messrs. W. K. Parker and T. Rupert Jones on some 



neath the Lincolnshire fens, and the Grignon tertiary beds, have 

 been the chief sources for these observations. 



The figured specimens illustrate the chief varieties of these 

 shells, which are tolerably numerous in the Norway dredgings. 



In registering the Norwegian forms of these two interesting 

 and variable species, we have taken the trivial term Icevis, which 

 indicates the first in the series of Lagence described by Mr. Wil- 

 liamson, as the most convenient appellation for the typical form ; 

 and globosa as the best and earliest for Entosalenia. The varie- 

 ties are almost as numerous as the individuals ; non-essential 

 characters only occurring as guides for us in the classification of 

 the innumerable forms. 



We must refer the reader to Williamson's admirable and care- 

 ful exposition of the nature and characters of Lagena and Ento- 

 salenia ; merely observing that, for reasons above alluded to, we 

 regard the forms here figured as referable to a single species 

 either of the one or of the other genus*. 



3. Nodosaria l(2vigata-\, D'Orb. PI. X. figs. 6-9. 



Soldani, Testae, et Zoophyt. pi. 101. f. kk; pi. 105. f. Q. R; pi. 118. tig. E. 



(smooth) i pi. 96. f. N. O. P. Q. R. S. (striated). 

 Nodosaria (subgeu. Glundidina) laevigata, D'Orb. Ann. des So. Nat. vol.vii. 



p. 252. no. l.pl. 10. f. 1-3. 

 Nodosaria (Gland.) glans, D'Orb. ih. no. 2 ; Modeles, no. 51 . 3 livr. [finely 



ribbed variety of N. Icevlgatd] . 

 Glandulina Imvigata, D'Orb. Foram. Vien. p. 29. pi. 1. f. 4, 5 ; G. ovula, ib. 



f. 6, 7 ; G. angulata, ib. f. 8, 9. 

 Nodosaria humilis, Roemer, Verst. Nordd. Kreid. p. 95. pi. 15. f. 6. 

 Nodosaria cylindracea, N. conferta, N. oligostegia, Reuss, Verst. Bohm. 



Kreid. i. p. 25-29. pi. 13. f. 1, 2, 10, 19, 20. 

 Glandulina rotundataX, G. tenuis, G. major, G. laguncula, a.nd Orthocerina 



pupoides, Bornemann, Liasform. Gottingen, p. 31. pi. 2. f. 1-5, p. 35. 



pi. 3. f. 14, 15. 



* As Mr. Williamson truly remarks. Walker was the first to give the 

 name " Lagena" to these flask-like Foram inifera. 



t In this instance we have taken some trouble to collate the figures and 

 descriptions of numerous varieties of this shell from those works which are 

 at present accessible to us. This is done to indicate the wide extent of 

 variation in this species ; and it also shows its great range both in time and 

 space. Many of the named varieties in this list are doubtlessly characteristic 

 of the individuals, and useful to geologists ; but we decline the task of 

 pointing out which should be preserved. Nor do we propose to supply 

 similar lists of synonyms for the other species which will here come under 

 notice. 



X The varieties of Nodosaria figured by Bornemann (op. cit.) from the 

 Lias of Gottingen, present an instructive series of gradations of form in 

 one species. The smooth forms (above enumerated) have from three or four 

 to six chambers, and vary considerabl\% both in general size and in the rela- 

 tive i)roportions of their chambers. Several ribbed forms arc also figured 



