GEOCHEMISTRY
Iu. I. Goncharov. Potassium in the waters of the Lower Permian halogen strata of the Donetz Basin . . . 426

PALEONTOLOGY
A. G. Vologdin, K. B. Cordé. Certain species of ancient Cyanophyta and their coenoses . . . 429

GENETICS
V. I. Agol, E. A. Tol’skaia, M. K. Voroshilova. Pleiotropy of guanidine mutations of the poliomyelithis virus . . . 433

BIOPHYSICS
I. D. Alexandrov. The correlation of the two kinds of postradiational destruction of cells in the marrow of mice either protected or unprotected by mexamine . . . 437
E. J. Graevskii, M. M. Konstantinova, O. M. Sokolova, A. G. Tarasenko. On the general mechanism of radiodefensory action of aminothiols and anoxia . . . 441
M. I. Ianushevskaia. The effect produced by intestine screening on the restoration of haemopoiesis in irradiated mice . . . 445

BIOCHEMISTRY
R. A. Zviagil’skaia, A. V. Kotel’nikova. The efficiency of oxidation phosphorylation in yeast mitochondria . . . 448
N. I. Shapiro, I. V. Moskvicheva. On the likeness of molecular weights of the diphteric toxin and anatoxin according to data of gel-filtration . . . 451

PLANT PHYSIOLOGY
M. I. Budyko, L. S. Gandin. A contribution to the theory of photosynthesis taking place in the layer of the vegetative cover . . . 454
O. N. Kulaeva, N. L. Kliachko. The effect of quinines on the synthesis of protein in leaves . . . 458

PHYSIOLOGY
I. L. Vaisfeld, N. I. Grashchenkov, G. N. Kassil’. Histamine, and inactivating systems in the case of acute cranio-cerebral trauma . . . 462
V. L. Lukianenko. A comparative description of the humoral factors of natural immunity in Acepenseridae . . . 466
I. V. Chudakova, O. M. Bocharova-Messner. Variation in functional and structural characters of wing-muscles in the ontogeny of Acheta domestica L. . . . 496

CORRECTION

In the article by F. S. Rofe-Beketov, “A criterion for the finiteness of the number of discrete levels introduced into lacunae of a continuous spectrum by perturbations of a periodic potential,” published in DAN, vol. 156, no. 3, 1964, on p. 516, line 12 from the bottom, where it reads
\((1+|\sqrt{\lambda}|\,\varphi(1,\lambda)|\), it should read
\((1+|\sqrt{\lambda}|)\,|\varphi(1,\lambda)|\); on p. 516, line 3 from the bottom, where it reads

\[ \int_{-\infty}^{\infty}, \]

it should read

\[ \int_{-\infty}^{x}. \]

In the article by F. S. Rofe-Beketov, “On expansion in eigenfunctions of systems with summable potential,” published in DAN, vol. 156, no. 5, 1964, on p. 1031, line 12, where it reads \(x=\|P(x)\|\), it should read \(x\cdot\|P(x)\|\); p. 1031, line 19 from the bottom, where it reads

\[ \int_{0}^{\infty}\|P(x)\|\,dx, \]

it should read

\[ \int_{1}^{\infty}\|P(x)\|\,dx. \]

T-11483
Signed for printing 2/IX-1965
Print run 4315 copies
Order 2762
Paper size \(70\times108^{1/16}\)
Printed sheets \(20.3+2\) inserts
Paper sheets \(7\frac14\)
Publisher’s accounting sheets 19.2

2nd printing house of the publishing house “Nauka,” Moscow, Shubinskii Lane, 10.