270 PALEONTOLOGY. 



characters of the genus. The species regarded as belonging to Oholella 

 are 0. chromaUca, 0. polita, 0. crassa, 0, nana, and 0. gemma, all 

 confined to the Potsdam period. H. A. N. 



Blake, Rev. J. F. Lower Silurian Eoraminifera. Geol. Mag. dec. ii. 

 vol. iii. pp. 134, 135. 



Notices the occurrence of well-preserved casts of Poraminifera in 

 laminated Caradoc shales near Aberystwith, the most perfect of which 

 could not be distinguished from those of Dentalina communis. H. A. N. 



. On JRenulina Sorhyana. Micr. Journ. vol. xv. pp. 262-264, 



woodcuts. 

 Certain minute kidney-shaped bodies, noticed by Mr. Sorby in the 

 Calcareous Grit of Scarborough, have now been found in abundance in 

 beds of about the same age at Sturminster Newton, Dorsetshire. The 

 author regards them as Foraminifera, and names them as above. 



E. T. N. 



Bornemann, Dr. L. G., Jr. [Aptychus.'] N. Jahrh. Heft vi. pp. 



646, 647. 

 On microscopic studies of Liassic and Jurassic Aptychi from Italy. 



Brady, H. B. A Monograph of Carboniferous and Permian Forami- 

 nifera (the Genus Fusulina excepted). Pp. 116, plates i.-xii. 

 Pal. Soc. 



After a short introduction, considers the structure and mode of 

 origin of the Mountain Limestone of Britain, which is not composed of 

 Foraminifera to any great extent or as a general rule. The next 

 section (pp. 8-18) deals with classification, and with various zoological 

 considerations. The principal conclusions are : — (1) The prevalent Car- 

 boniferous and Permian Foraminifera (except Fusulina) do not belong, 

 in a strict sense, to either of the two suborders Perforata and Im- 

 perforata, but rather to intermediate types, neither invariably arena- 

 ceous nor uniformly perforate in their shell-texture. (2) In the modi- 

 fications of these primitive intermediate types some varieties occur 

 which are conspicuously sandy and imperforate, others that are essen- 

 tially hyaline and porous ; and there are indications that their varietal 

 peculiarities have been transmitted as permanent characters, thereby 

 originating the two parallel isomorphic series. (3) From negative 

 evidence, the porcellanous imperforate group (Miliolida) is of later 

 creation. (4) The Permian rhizopod-fauna is very^ limited as com- 

 pared with the Carboniferous, being confined to 5 genera — Trocliam- 

 mina, Nodosinella, Noclosaria, Tecctularia, and Fusulina, representing, 

 however, at least 4 families. An outline of the history of the subject 

 is given, followed by a chronological list of the materials upon which 

 the nomenclature of the monograph is based. Pp. 27-51 are devoted 

 to a consideration of localities. A bibliography is given ; and the 

 body of the work (pp. 56-151) is occupied with the description of the 

 genera and species. 59 species (some not yet detected in Britain) are 



