pes 
468 MR. H. B. BRADY ON THE RHIZOPODAL FAUNA OF THE SHETLANDS. 
No. 41. LINGULINA CARINATA, d'Orb. 
No specimen has rewarded my diligent search for it. Mr. Barlee's better fortune (see 
Will. Rec. For. Gt. Brit. p. 14) entitles us to retain it in our list, —a point of interest, for 
the reasons before stated, in connexion with the Norwegian fauna. 
No. 49. GLANDULINA L&VIGATA, d'Orb. (Plate XLVIII. fig. 7.) 
Mr. Waller, in his search for the shells of the Mollusca, has been fortunate enough to 
meet with four specimens of this beautiful species. It is common in a fossil state in 
many strata, but the individuals are usually smaller than those found in a recent con- 
dition. It has considerable geographical range, being noted as far north as the Norwegian 
coast, but does not seem to be abundant in a living state anywhere. G. levigata is 
pretty well known by d'Orbigny's figures (Ann. des Sci. Nat. vol. vii. pl. 10. figs. 1-3, and 
For. Foss. Bas. Tert. Vien. pl. 1. figs. 4 & 5), and may be looked upon as a subtype of 
Nodosaria. Length 35 inch. 
No. 57. BiGENERINA DIGITATA, d'Orb. (Plate XLVIII. fig. 8.) 
Though Bigenerina can scarcely be said to represent a true genus, it is a convenient 
term for a tolerably well-defined group of Textulariæ. Its peculiar mode of growth, 
commencing biserially like the typical Textularia, but becoming uniserial after a certain 
number of chambers are formed, is sufficient to distinguish the group from its allies. 
Like the larger Textularie, its shell is arenaceous in texture, and the arrangement of the 
chambers is often obscured by its rough exterior. The specimens collected are less 
attenuated than d’Orbigny’s *Modéle' no. 58, but the earlier chambers have not the 
wider growth which gives the spear-headed contour to his other species, B. nodosaria. 
It occurs sparingly in several parcels of dredgings from depths of 70 to 90 fathoms. 
Length -y inch. 
No. 66. BOLIVINA PUNCTATA, d'Orb. (Plate XLVIII, fig. 9.) 
Typically, Bolivina punctata belongs to a triserial group, Bulimina; but in the en- 
feebled form in which it is found in Northern seas it becomes biserial, and is isomor- 
phous with Tertularia, from which it is with difficulty distinguished. The twisted mode 
of growth and oblique aperture, as figured by d'Orbigny (Voyage dans l' Amér. mérid. 
pl. 8. figs. 10-12), are tolerably characteristic, but these are by no means invariable 
features in the exceedingly small and delicate specimens found in the Shetland dredgings. 
Length +}; inch. 
No. 70. DISCORBINA OCHRACEA, Will, sp. 
Obtained from Mr. Barlee's Shetland sands. (See Will. Ree. For. Gt. Brit. p. 55, pl. 4. 
fig. 112, & pl. 5. fig. 113.) 
