. Herpetological cinesi di ricerca. Anfibi e Rettili. I aprile 1989 Herpetological cinese Research Vol. 2, n. 2, pagg. 55-591 Karyotypic studi di Sphenomorphus indicus (Scincidae) e Takydromus septentrionalis (Lacertidae) YUHUA YANGl- ZHENGFA GAO^, ANfD ERMI ZHAO^ ^Dipartimento di Bioingegneria, Università di Sichuan, Chengdu Sichuan, Cina ^County Middle School ofAnxian, Sichuan , Cina ^Chengdu Istituto di Biologia, Academia Sinica, Chengdu Sichuan , Cina astratta. -Sphenomorphus indicus (grigio) ha un numero diploide di 28 con 14 macrochromosomes metacentrica e 14 microchromosomes. Il

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. Chinese herpetological research. Amphibians; Reptiles. I April 1989 Chinese Herpetological Research Vol. 2, No. 2, pp. 55-591 Karyotypic studies of Sphenomorphus indicus (Scincidae) and Takydromus septentrionalis (Lacertidae) YUHUA YANGl- ZHENGFA GAO^, ANfD ERMI ZHAO^ ^Department of Bioengineering, Sichuan University, Chengdu, Sichuan, China ^County Middle School ofAnxian, Sichuan , China ^Chengdu Institute of Biology, Academia Sinica, Chengdu, Sichuan , China Abstract. -Sphenomorphus indicus (Gray) has a diploid number of 28 with 14 metacentric macrochromosomes and 14 microchromosomes. The NF value is 42. Takydromus septentrionalis (Guenther) has a karyotype with 36 acrocentric macrochromosomes and only 2 microchromosomes (2n=38). The NF value is 38. These karyotypic data are compared with related species. Key words: Sauria, Scincidae, Lacertidae, Sphenomorphus, Takydromus, Cytotaxonomy, Sichuan, China. I*rovince, China. The specimens were injected intraperitoneally with 0.01 ml colchicine solution (3mg/ml) per gram of body weight. Sixteen hours after the injection, he specimens were killed. The bone marrow cells were flushed with 1% sodium citrate, the testes were removed, and cell suspensions were prepared. Then the chromosome preparations were made using an air-drying technique. The diploid number (2n) was determined by observing the preparations under an oil objective. Ten selected cells were photographed, enlarged, and measured for calculating the chromosome parameters. The chromosomes were classified with the standard proposed by Levan et al. (1964). The abbreviations for the morphology of chromosomes are as follows: "M" is used for a macrochromosome, "m" for a microchromosome, "V" for a metacentric chromosome and "I" for an acrocentric chromosome. The "Nombre Fondamental" (NF) is the total number of arms in the karyotype. A metacentric (V) has two arms, an acrocentric (I) has one arm, and a microchromosome

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