Oxygen consumption, heart rate, and thermal tolerance were measured in week-old embryos of Heermann's gull ( h r u s heermanni). Heart rate and oxygen consumption are temperature independent between 30 and 40 C and average 120 beats/min and 1.87 cm3 Ot/(egg-h). Below 30 C, these rate processes become strongly temperature dependent, and the heart stops beating when cooled to 7-13 C. The beat rec...

genetic relationship between predisposition to schizophrenia and heredito-constitutional resistance to tuberculous infection." Dr. Shuttleworth doubts that the author's figures warrant this claim as they show a decline of the death rate of tuberculosis at a rate to be expected in any population. To me, the author seems to make a very bold guess when he regards it probable that the common origin...

Contents 1. Introduction to the systematic zoology of the Metazoa (Animalia) 2. Animal phylogeny: data sources and interpretation 2.1 Morphology 2.2 Molecules 2.3 Fossils 3. Systematic zoology of the Metazoa 3. 3.12 Some extant " problematica " 4. Alternative hypotheses of metazoan relationships 4.1 Morphology 4.2 Molecules 5. Reconciliation and pathways to future progress Acknowledgments Gloss...