褶纹冠蚌鳃的组织学和扫描电镜观察

利用光镜和扫描电镜研究了雌性褶纹冠蚌外瓣鳃的组织学和形态。结果表明，雌性褶纹冠蚌具一对外瓣鳃，每个外瓣鳃都由内，外二鳃小瓣构成，每片鳃小瓣又由许多纵行排列的鳃丝组成，鳃丝表面具前纤毛，前侧纤毛和侧纤毛，其壁主要由角质层，上皮和基膜组成，内含几丁质棒，鳃腺和血管。相邻鳃丝之间由丝间隔相连，鳃小瓣内的空腔被瓣间隔分隔成许多鳃水管。丝间隔和瓣间隔的壁主要由单层柱状上皮和基膜组成，其内均有血管分布，在繁殖期间瓣间隔形态发生变化，将鳃水管分隔成许多小室，形成胚胎发育的卵化室。

Histological and scanning electron microscopic observations on the gill of Cristaria plicata

The histology and morphology of the outer lamina of the female Cristaria plicata were studied with light microscopy and SEM.The results show that the female C.plicata has a pair of outer lamina,and every one of them is composed of the inner and outer lamellae.Every lamella consists of many longitudinal-arranged branchial filaments which have frontal cilia.laterofrontal cilia and lateral cilia on its surface.The branchial filament contains chitious rod,gill gland and blood vessel,and its wall is composed of cuticle layer,epithelium and basal membrane.It is connected by interfilamentary junction between branchial filaments.The chamber between lamellae is partitioned into many water tubes by interlamellar junction.The interfilamentary and interlamellar junction has blood vessels,and the wall of them is composed of basal membrane and a single layer of columnar epithelium.The morphology of the interlamellar junction changes during reproduction,the water tubes are subdivided into many sinail brood chambers which are the site of embryonic development.