752 
DE. W. B. CAEPENTEE AND ME. H. B. BEADY ON 
the mountain through which the Ab-l-Bazuft flows,” and then follows this foot-note : — 
“ A few miles N.E. of this stream (but before reaching the left bank of the Ku.ran at Du 
Pulun) I procured from a hard rock of blue marly limestone a gigantic species of Alveo- 
lina , three inches in length.” The station appended to the specimens in the British Mu- 
seum and the Geological Society is the “ Kellapstun Pass, near Dii Pulun, Bakhtiyari 
Mountains, Persia.” Unfortunately scarcely any of the names mentioned appear on the 
“ Sketch-map” that accompanies the paper ; and for scientific purposes the district referred 
to maybe said to be as yet unmapped. I am indebted to Mr. Keith Johnston, of Edin- 
burgh, for a detailed tracing of the region, procured with some pains from unpublished 
German sources ; from which it appears that Du Pulun is on the 32° parallel N. Lat., 
and that a Longitude of 50° 30 E. would indicate a point halfway between it and the 
little mountain stream Ab-l-Bazuft. The district lies between the N.E. corner of the 
Persian Gulf and Isfahan. 
50. Our knowledge of the Geological distribution of the type may be summed up in few 
words. Mr. Loetus appears to regard the “ blue marly limestone ” as belonging to the 
oldest Tertiary rocks, though he does not say so very distinctly ; and the evidence of the 
Foraminifera imbedded in it leads pretty conclusively to the same view. The data 
afforded by the Microzoa are probably sufficient confirmation, in the absence of any satis- 
factory record of larger fossils from the same geological horizon. 
In conclusion I have to express the obligation I am under to my friends Mr. W. K. 
Parker and Dr. Carpenter, for the interest they have taken in the subj ect of the pre- 
sent paper; — to both for suggestions derived from their large knowledge and philo- 
sophic views in connexion with the Protozoa generally, — to the latter for light thrown 
upon obscure points by the study of collateral structures in Par Jeer ia, and above all for 
the opportunity of constant reference to specimens of that genus, without which the 
history now given could not have been so far elaborated. 
Explanation of the Plates of Loftusia. 
PLATE LXXVII. 
Fig. 1. Piece of Loftusia- limestone, the surface of which has been 4 weathered’ by expo- 
sure, and the sections of the fossils thereby brought into relief ( natural size). 
Figs. 2, 3 & 4. Loftusia Persica ( natural size). Of these figs. 2 & 3 represent longer 
and shorter individuals of the normal form, whilst fig. 4 is the compressed 
variety with lenticular transverse section described in § 27. Figs. 2“, 3°, 4“ 
represent the transverse sections of the three specimens drawn to their natural 
size. 
Fig. 5. Section of the Limestone rock forming the matrix of Loftusia, with Foraminifera 
in situ. 
a. Young specimen of Loftusia cut transversely, showing the space enclosed 
