中文摘要：

本文采用扫描电子显微镜对7种头足类腕上的吸盘及乌贼的内壳进行观察。结果表明,蛸科（Octopodidae）的短蛸（Octopus ocellatus）、真蛸（O.vulgaris）和长蛸（O.variabilis）腕的吸盘均无齿;乌贼科（Sepiidae）的日本无针乌贼（Sepia japonica）和金乌贼（S.esculenta）的腕和触腕吸盘上的角质环均有齿,且齿的形状不同,虎斑乌贼（S.pharoanis）触腕的吸盘角质环光滑无齿;枪乌贼科（Loliginidae）的中国枪乌贼（Uroteuthis chinensis）腕上吸盘的角质环无齿。对3种乌贼内壳横切面进行扫描电镜观察,乌贼内壳的背表面和腹表面均由文石和铺在上面的球型颗粒构成,但文石的形状和小球的排列存在种间差异,这些差异可以作为头足类分类的辅助特征。

英文摘要：

In this paper,the surface microstructures of suckers and endoskeletons in seven species of Cephalopods,were observed by the scanning electron microscopy. Three samples from each structure were fixed with 2. 5% pentanediol,and then,the suckers were cut,and endoskeletons were separated into 0. 5 cm ×0. 5 cm small pieces. All small pieces were dehydrated with 30%,70%,95% and 100% alcohol before observation by the scanning electron microscope. Samples were measured and pictures were taken after observation. The results showed that suckers of Octopus ocellatus,O. vulgaris and O. variabilis（ belong to Octopodidae） had no teeth. There were teeth,on the suckers surface in populations of Sepia japonica and S.esculenta（ belong to Sepiidae）,and their suckers had cuticular ring. Teeth structures varied in different species. However,in population of S. pharaonis,the suckers contained smoothy cuticular ring but had no teeth,while in the population of Uroteuthis chinensis,the suckers contained cuticular rings but had no teeth. In these cuttlefishes observed by scanning electron microscopy,all the endoskeletons surfaces（ back and ventral）were composed of aragonite and small spherical particles,but the shape of aragonite and the arrangement of thespheric particles varied in different species. These differences could be used to classify Cephalopods species as auxiliary characters.