376 
ME. W. K. PAEKEE AND PEOFESSOE T. E. JONES ON SOME 
gradual modifications in form lead us from Virgulina squamosa , D’Orb. (Modele, 
No. 64), before us, through V. Schreibersii (fig. 18), to the more regular Bulimince. 
This variety has the same world-wide distribution as V. Schreibersii ; but is never 
common: at the Hunde Islands it is rare and small at 30-40 and 60-70 fathoms; and 
it was rare and large in the mixed sands from Norway. 
As an enfeeblement of Bulimina, it points in one direction to V. Schreibersii , and in 
another to the Bolivince. Fig. 20 is a specimen that can scarcely be separated from 
Bolivina 'punctata. 
Bulimina Presli, Reuss, Yar. (Bolivina) costcita, D’Orbigny. Plate XVII. fig. 75 (North 
Atlantic). 
“ A more decided modification of the Bulimine type is presented by those forms which 
have been ranked by D’Orbigny in his genus Bolivina ; the arrangement of the segments 
being here regularly biserial and alternating, as in Textularia ; but the aperture never 
loses the elongation and the inversion of its lips, characteristic of the Bulimine type, 
and its direction is usually somewhat oblique. In the B. costata of D’Orbigny (For. 
Amer. Merid. p. 62, pi. 8. figs. 8, 9) there is a set of right parallel costae, running con- 
tinuously from one segment to another along the entire length of the shell, giving to it 
a very peculiar aspect” (Carpenter, ‘ Introd.’ p. 196). 
The inversion of the lip of the aperture, characteristic of Bulimina , and homologous 
with the intussusception of the neck-tube in Lagena , is well seen in some young trans- 
parent Bolivince. 
B. costata is rare and large at 223 fathoms on the marginal plateau off the coast of 
Ireland. D’Orbigny found it common at 20 metres at Cobija, South America; an 
allied and small variety, B. plicata (op. cit. pi. 8. figs. 4-7), he found in deeper water at 
Valparaiso. 
B. costata lives on muds and is found fossil in clays, like other Bulimince ; flourishing 
down to about 100 fathoms ; it is never common, but is found on the west coast of Scot- 
land, and from the south coast of England (Eastbourne) to the tropics. 
Bulimina Presli , Reuss, Var. (Bolivina) punctata , D’Orbigny. Plate XVII. fig. 74 
(North Atlantic). 
The figured specimen is a short and vesicular subvariety of B. punctata , D’Orbigny. 
(For. Amer. Merid. p. 63, pi. 8. figs. 10-12), which is the centre of a group of many 
forms. The one before us is perfectly Textulariform, and can be diagnosed as a Bulimina 
only by the shape and subobliquity of its aperture. 
We find it rare and small at 43 and 415 fathoms, and rather common and small at 
223 fathoms, on the marginal plateau off Ireland. 
D’Orbigny got it rather common at from 40 to 50 metres at Valparaiso. 
B. punctata is world-wide, reaching as low as 100 fathoms. In the Mediterranean 
area it is both recent and fossil. It is present in the Oxford and Kimmeridge Clays. 
