1. The karyotype of the black rat (Rattus rattus L.). Another population with a 38-chromosomes complement

   • E. Capanna
   • Maria Vittoria Civitelli
   • R. Nezer

   Specialia 01 April 1970 Pages: 422 - 425

2. Chromosome polymorphism in deer mouse siblings (Peromyscus maniculatus)

   • D. T. Arakaki
   • Iris Veomett
   • R. S. Sparkes

   Specialia 01 April 1970 Pages: 425 - 426

3. Polymorphism in the somatic chromosomes ofNeotoma micropus Baird, the plains woodrat

   • R. J. Baker
   • J. T. Mascarello
   • R. G. Jordan

   Specialia 01 April 1970 Pages: 426 - 428

4. The mitotic chromosomes of the lamprey,Petromyzon marinus L.

   • I. C. Potter
   • B. Rothwell

   Specialia 01 April 1970 Pages: 429 - 430

5. Prediction and explanation of chemical mutation sites

   • I. Nicholson

   Specialia 01 April 1970 Pages: 430 - 432

6. In vitro induction of vegetative buds on inflorescence segments ofHaworthia

   • K. Kaul
   • P. S. Sabharwal

   Specialia 01 April 1970 Pages: 433 - 434

7. Polarity and symmetry in composite oocytes ofCarausius morosus Br. (Cheleutoptera, Phasmidae)

   • L. P. Pijnacker
   • L. J. Diephuis

   Specialia 01 April 1970 Pages: 434 - 435

8. Klangspektrographische Untersuchung der Lautäusserung beim Krallenfrosch,Xenopus laevis

   • R. Müller
   • U. Scheer

   Specialia 01 April 1970 Pages: 435 - 436

9. Isolation of an antibiotic-resistant, lactose-fermenting strain ofProteus rettgeri

   • W. H. Traub

   Specialia 01 April 1970 Pages: 437 - 438

10. Effects of phenethyl alcohol on influenza virus growth and macromolecular synthesis in chick embryo cells

    • B. W. J. Mahy
    • C. M. Lockwood

    Specialia 01 April 1970 Pages: 438 - 439

11. The host-parasite interface of strigeoid trematodes VIII. Surface specialization of the adhesive organ of cardiocephaloides physalis (Lutz, 1926)

    • D. A. Erasmus

    Specialia 01 April 1970 Pages: 439 - 441

12. Properties of a blue-green algal sheath

    • A. A. Tuffery

    Specialia 01 April 1970 Pages: 441 - 442

13. A simple method for the estimation of yeast-growth in hydrocarbon-substrates by determination of turbidity

    • H. Katinger

    Specialia 01 April 1970 Pages: 442 - 443

14. A new air sampler

    • S. T. Tilak
    • R. L. Kulkarni

    Specialia 01 April 1970 Pages: 443 - 444

15. Bacterial localization: The use of an autographic method for the study of infectious processes in mice

    • E. Tubaro
    • M. J. Bulgini

    Specialia 01 April 1970 Pages: 445 - 446

16. Umweltbezogene Verhaltensanalyse — Tier und Mensch

    • N. Tinbergen

    Specialia 01 April 1970 Pages: 447 - 456

17. Congressus

    Report 01 April 1970 Pages: 456 - 456

18. International cell research organization (ICRO)

    Actualitas 01 April 1970 Pages: 456 - 456