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fang evolution in Tertiary forms, where, un-and ribs of modern reptiles, p. 201-310. In: Biolderstandably, the dentition is seldom pre-ogy of the Reptilia, Vol. I. C. Gans (ed.). Acad. served. Press. KARDONG, K. V. 1974. Kinesis of the jaw apparatus during the strike in the cottonmouth snake, Agkistrodon pisczuorus. Forma et funcio 7:327-354.-. 1975. Prey capture in the cottonmouth snake We gratefully acknowledge the support of (Agkzstrodon pisciuorus). J. Herp. 9: 169-175. NSF Grants DEB 78-10831 and PChI-8022980 KLAUBER, L. M. 1972. Rattlesnakes: Their habits, (to JAR). We are indebted to M. Rand, L. Kloslife histories, and influence on mankind. Univ. Calterman, R. Storm and R. Forbes for providing if. Press. many of the specimens used in this study. We PREGILL, G. K. 1977. Axial myology of the racer are particularly grateful to K. V. Kardong for Coluber constrictor with emphasis on the neck rehis incisive criticisms of the manuscript.

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101 homicides caused by stabbing were examined for the presence of defence-injuries. 50 victims showed 174 defence-injuries on hands and forearms (133 incision wounds, 26 stab wounds and 15 cutting through). More than two thirds of lesions were found on left arm. That those lesions mostly were found on left arm is caused by the interaction between perpetrator and victim. Victims left arm is nearest to the perpetrator therefore it is used as a mean of defence first of all. The probability that defence-injuries can be seen is rising with the number of stab wounds. Localisation of a defence-injury on the extensor side ("passive") or on the flexor side ("active") is conditioned by accidentalities. Such a differentiation should be given up because no conclusions on the readiness of defence can be drawn.