466 MR. H. B. BRADY ON THE RHIZOPODAL FAUNA OF THE SHETLANDS. 
five forms which I have not myself noticed, ‘on the authority of Mr. Barlee's specimens 
noted in Professor Williamson's work, and in the few instances in which this has been 
done it is duly acknowledged. 
I have to thank my friends Messrs. Parker and Jones for their kind assistance in many 
doubtful points—assistance they have been ever ready to render, and doubly valuable 
from their great experience and extensive knowledge of all matters connected with the 
Protozoa. 
Notes on the rarer Species and Varieties obtained—chiefly on those not before recorded as 
British. 
[The numbers refer to the corresponding numbers in the annexed list. ] 
No. 5. BrLoCcULINA SPHÆRA, d'Orb. (Plate XLVIII. fig. 1.) 
Two specimens of this rare and interesting Béloculina were found. In its fully 
developed condition it is sufficiently distinguished from its :allies by its spherical shape 
and the large, rounded outer chamber, which almost entirely embraces the inner ones. 
It is described by d'Orbigny in the ‘Voyage dans l'Amérique méridionale;' but his 
figures (pl. 8. figs. 13-16) are defective, and do not show the aperture. Mr. Parker has 
several specimens from the Butt of Lewis. Diameter 4; inch. : 
No. 6. BILOCULINA CONTRARIA, d'Orb. (Plate XLVIII. fig. 2.) 
A large, coarse shell, differing from the other varieties of the same type in the form 
and disposition of the chambers, which are here found in a directly opposite condition to 
that usually observed in the Biloculine. The whole shell is compressed laterally instead 
of from front to back, and the position of the aperture is correspondingly altered, being 
situated near the summit of the narrow, rounded end-view, so to speak, of the shell. It 
appears to be exceedingly rare, only two specimens having oecurred in the examina- 
tion of.alarge quantity of material. Diameter is inch. (See d’Orb. For. Foss. Bas. Tert. 
Vien. p.266, pl. 16. figs. 4—0.) 
No. 12. TRILOCULINA TRICARINATA, d’Orb. (Plate XLVIII. fig. 3.) 
This is a tolerably well-defined modification of the Triloculine subtype, characterized 
by having each of the three external chambers extended to a sharp edge, thus forming 
three keels or ridges running from end to end of the shell. It isa common form in 
many seas, and occurs abundantly in a fossil condition in the Tertiaries of Grignon and 
other deposits. Long diameter szinch. (See d'Orbigny's Modèle’ no. 94.) | 
No. 17. QUINQUELOCULINA PULCHELLA, d'Orb. (Plate XLVIII. fig. 4.) 
T e dienen " numberless species of Triloculina and Quinqueloculina founded by 
"ak icd hess - aen ihe mere surface-ornamentation of the chambers, it will be 
POR: aru io keep this name, applied to one of Soldani's figures (adopted by 
| guy, an, des Sci. Nat. vol. vii. p. 303), for the forms characterized by 6 
longitudinal ridges. سكا‎ the same way, Quingueloculina Brongniartiana should take Pre- 
