220 FORAMINIFERA OF THE CRAG. 



and pupoides) are essentially the same, differing but slightly in contour and style 

 of growth. Of the three, the little specimens from the Crag best agree with the 

 proxima form. 



PI. vii, fig. 15 (Gredgrave), has the sutures shallower and the riblets smaller 

 than pi. iv, fig. 8 (Bridlington). Brady's figure of N. proxima has the two 

 chambers nearly equal in size, with a deep suture, and he was somewhat inclined 

 to refer it to N. scalaris (Batsch). The number of ribs varied in the specimens 

 collected by the ' Challenger.' 



Some bilocular costate Lagenx (simulating N. proxima) have been figured by 

 Parker and Jones, Wallich, 0. Rymer Jones, &c. ; they have the second or super- 

 added chamber larger than the first, corresponding in some degree to the beginning 

 of microspheric Nodosarise. 



Throughout the series from the Crag there is considerable variation in both the 

 depth of suture and number of riblets. 



Occurrence. — Nodosaria proxima in recent seas appears to be confined to 

 tropical and subtropical latitudes. Specimens were obtained by the ' Challenger' 

 from off the Azores (450 fathoms) ; off Tristan d'Acunha (100 to 150 fathoms), 

 of Raine Island, Torres Strait (155 fathoms) ; off the Phillipines (95 fathoms), 

 and off the coral reef of Honolulu (40 fathoms). The shell figured in 'Phil. 

 Trans.,' vol. civ, 1865, pi. xvi, fig. 2, from the North Atlantic, nnder the name of 

 N. scalaris^ is probably referrible to this species. 



Fossil specimens have been obtained from the Pliocene of San Quirico, near 

 Sienna (Silvestri), and of Ponticello, near Bologna (Fornasini). We have in our 

 own collections numerous specimens from the Miocene of Muddy Creek, and from 

 the Casterlian and Scaldisian of Antwerp. In the Coralline Crag it occurs in 

 nearly every zone examined. 



Genus^ 3. — Dentalina, d'Orhigny, 1826. 



Part 1, 1866, p. 53. 



This subgeneric (or, indeed, only quasi-suhgeneric) form of Nodosaria has 

 been so often referred to by writers on Foraminifera, both separately and under 

 the name of Nodosaria, that it appears to be useless to endeavour to disentangle 

 the reference further than as suggested at page 53 of Part I. So that besides 

 indicating Nodosarina as having been used as a comprehensive generic term by 

 Parker, Jones, Goes, and a few other authors, we need only add to each of the 

 lists there given, under "Nodosaria " and "Dentalina," the words "and others." 



^ Quasi-generic only. 



