Bibliographical Notices. 61 
for the great faults occurring in the few papers on this part of 
Swiss paleontology. | 
The results of long researches on the Foraminifera of the 
a Malm shall be published in a short time. For the 
present I hope that these few remarks on the Jurassic Tio- 
chammine may be sufficient to furnish further proofs of the 
wide range and great variability of this interesting genus. 
EXPLANATION OF PLATES III. & IV. 
Figs. 1-3. Trochammina incerta reg. 
Figs. 4,5. T. mcerta reg., passing into 7. incerta irree. 
Figs. 6, 7. T. incerta, elliptical variety, showing the discoidal arrange- 
ment of the older convolutions. 
Figs. 8-20. T. gordialis. 
Fig. 10 a-d. Apertures of same. 
Fig. 21, T. charoides, 
Figs. 22, 22 a, b. T. filum. 
Figs. 23, 24. T. constricta. 
Fig. 25. ’ Aperture of same. 
Fig. 26. T. constricta, coiled up in the opposite manner, showing the. 
last straight chamber with the small circular aperture. 
Fig. 27. T. pusilla. 
Figa 28, 29. The same, the interior convolution hidden by finely arena- 
ceous shell-matter. 
Fig. 30. Ditto, aperture. 
Fig. 30 a. Ditto, showing the fringe of hyaline cement. 
Figs. 31-34. T. jurassica. 
Figs. 35, 36. Ditto, with different development of the last chamber. 
Figs. 37-39. Ditto. 
Fig. 40, Ditto: portion of shell, with grains of sand and spicules. a= 
erystal of pyrites. 
Figs. 4], 42. Trochammina, intermediate form between 7. constricta and 
the rotaline varieties. 
BIBLIOGRAPHICAL NOTICES. 
A Monograph of the British Fossil Cephalopoda. Part I. Introduc- 
tion and Silurian Species. By J. F. Brawn, M.A., F.G.S., Pro- 
fessor of Natural Science in University College, Nottingham, 
Ato. London: J. Van Voorst, 1882, 
Tuts work, uniform in size and style with the Memoirs of the 
Paleontographical Society, will comprise a complete history of 
the British Palseozoic Cephalopoda, a group of Mollusca important 
to the geologist, which, from their distribution and varied forms, 
constitute a characteristic portion of the early fauna of the globe. 
By grants from the Government fund in aid of scientific research, 
the author has been able to collect materials from various museums 
